CN116048159B - Satellite thermal management method and device based on matching degree and storage medium - Google Patents
Satellite thermal management method and device based on matching degree and storage medium Download PDFInfo
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Abstract
The application discloses a satellite thermal management method and device based on matching degree and a storage medium. The method comprises the following steps: comprising the following steps: acquiring a first temperature sequence of a temperature measuring point corresponding to the heater in the process of controlling the heater to heat, wherein in the process of heating, the heater is controlled to stop heating when the temperature of the temperature measuring point is greater than a first temperature threshold value, and the heater is controlled to start heating when the temperature of the temperature measuring point is less than a second temperature threshold value; acquiring a preset second temperature sequence, wherein the second temperature sequence oscillates around the target temperature between a first temperature threshold and a second temperature threshold at a preset frequency; determining a degree of matching between the first temperature sequence and the second temperature sequence; and controlling an output power of a power supply for supplying power to the heater based on the degree of matching.
Description
Technical Field
The present application relates to the field of satellite technologies, and in particular, to a satellite thermal management method and apparatus based on matching degree, and a storage medium.
Background
Thermal management techniques play a very important role in the satellite operation. By means of a thermal management system, the satellite interior can be kept at a constant temperature during operation. FIG. 1 shows a schematic diagram of a known thermal management system. Referring to fig. 1, the thermal management system 100 includes a processor 110, a temperature sensor 120, a heater 130, a power supply 140, and a switch 150.
Wherein the temperature sensor 120 is disposed at a temperature measuring point corresponding to the heater 130, for measuring a temperature of the temperature measuring point. The heater 130 is connected to a power source 140 through a switch 150. The processor 110 is connected to the temperature sensor 120 and the switch 150, and controls on and off of the switch 150 according to temperature information received from the temperature sensor 120. And further controls the power supply 140 to supply power to the heater 130.
Specifically, when the temperature information received by the processor 110 is greater than the first temperature threshold Tth 1, the switch 150 is turned off, so that the power supply 140 stops supplying power to the heater 130. When the temperature information received by the processor 110 is less than the second temperature threshold Tth 2 (where Tth 2＜Tth1). Processor 110 turns on switch 150 so that power supply 140 begins to supply power to heater 130. Thus, the temperature of the temperature measuring point (i.e., the temperature information detected by the temperature sensor 120) takes the form of oscillation between the first temperature threshold value Tth 1 and the second temperature threshold value Tth 2, as shown in fig. 2.
Wherein fig. 2 shows a graph of the temperature measured by the temperature sensor 120 at the temperature measuring point over time. Referring to fig. 2, first, at time t 0, the processor 110 turns on the switch 150 to supply power to the heater 130, so that the temperature of the temperature measurement point increases with time, and at time t 1, the temperature rises to the first temperature threshold Tth 1. Then at time t 1, the processor 110 turns off the switch 150, the power supply 140 stops supplying power to the heater 130, and the temperature of the temperature measurement point starts to drop accordingly, so that the temperature immediately drops to the second temperature threshold Tth 2 at time t 2. Then at time t 2, the processor 110 turns on the switch 150, and the power supply 140 supplies power to the heater 130, so that the temperature of the temperature measurement point increases with time, and at time t 3, the temperature rises to the first temperature threshold Tth 1. Then at time t 3, the processor 110 turns off the switch 150, the power supply 140 stops supplying power to the heater 130, and the temperature of the temperature measurement point starts to drop accordingly, so that the temperature immediately drops to the second temperature threshold Tth 2 at time t 4. The process is repeated so that the temperature of the temperature measuring point oscillates around the target temperature Tref between the first temperature threshold value Tth 1 and the second temperature threshold value Tth 2.
In this manner, the thermal management system 100 thus controls the temperature of the temperature measurement point between the first temperature threshold value Tth 1 and the second temperature threshold value Tth 2.
Nevertheless, the inventors have found that the frequency at which the temperature measurement point oscillates between the first temperature threshold Tth 1 and the second temperature threshold Tth 2 still has an effect on the ambient temperature within the satellite. I.e. a relatively smooth temperature change with respect to high frequency oscillations of the temperature, is more advantageous for maintaining the environment within the satellite.
Specifically, referring to fig. 3A, although the temperatures represented by the temperature profile 1 and the temperature profile 2 are both oscillated around the target temperature Tref between the first temperature threshold Tth 1 and the second temperature threshold Tth 2, the temperature variation represented by the temperature profile 2 is more advantageous to maintain stability within the satellite environment and also to save the output of the power supply 140 because the temperature variation represented by the temperature profile 2 is smoother with respect to the temperature profile 1. In addition, fig. 3B shows a temperature curve 3 of a temperature measurement point in another case. As shown in fig. 3B, in this case, the change of the temperature curve 3 is too gentle, so that the control action of the first temperature threshold value Tth 1 and the second temperature threshold value Tth 2 on the temperature cannot be fully exerted, so that the temperature of the temperature measurement point is in a state of being far from the target temperature Tref for a long period of time.
However, the conventional thermal management system can only oscillate the temperature of the temperature measuring point between the first temperature threshold value Tth 1 and the second temperature threshold value Tth 2, and cannot control the oscillation frequency.
Aiming at the technical problem that the thermal control system in the prior art can not control the frequency of temperature oscillation, no effective solution is proposed at present.
Disclosure of Invention
The embodiment of the disclosure provides a satellite thermal management method, a device and a storage medium based on matching degree, which at least solve the technical problem that a thermal management system in the prior art cannot control the frequency of temperature oscillation.
According to an aspect of the disclosed embodiments, there is provided a satellite thermal management method based on matching degree, including: acquiring a first temperature sequence of a temperature measuring point corresponding to a heater in the process of controlling the heater to heat, wherein in the process of heating, when the temperature of the temperature measuring point is greater than a first temperature threshold value, the heater is controlled to stop heating, and when the temperature of the temperature measuring point is less than a second temperature threshold value, the heater is controlled to start heating; acquiring a preset second temperature sequence, wherein the second temperature sequence oscillates around a target temperature between the first temperature threshold and the second temperature threshold at a preset frequency; determining a degree of match between the first temperature sequence and the second temperature sequence; and controlling an output power of a power supply for supplying power to the heater based on the degree of matching.
According to another aspect of the embodiments of the present disclosure, there is also provided a storage medium including a stored program, wherein the method described above is performed by a processor when the program is run.
According to another aspect of the embodiments of the present disclosure, there is also provided a satellite thermal management device based on matching degree, including: a first temperature sequence obtaining module, configured to obtain a first temperature sequence of a temperature measurement point corresponding to a heater during heating by controlling the heater, wherein during the heating, when the temperature of the temperature measurement point is greater than a first temperature threshold, the heater is controlled to stop heating, and when the temperature of the temperature measurement point is less than a second temperature threshold, the heater is controlled to start heating; a second temperature sequence acquisition module for acquiring a preset second temperature sequence, wherein the second temperature sequence oscillates around a target temperature between the first temperature threshold and the second temperature threshold at a preset frequency; the matching degree determining module is used for determining the matching degree between the first temperature sequence and the second temperature sequence; and a power control module for controlling an output power of a power supply for supplying power to the heater based on the degree of matching.
According to another aspect of the embodiments of the present disclosure, there is also provided a satellite thermal management device based on matching degree, including: a processor; and a memory, coupled to the processor, for providing instructions to the processor to process the steps of: acquiring a first temperature sequence of a temperature measuring point corresponding to a heater in the process of controlling the heater to heat, wherein in the process of heating, when the temperature of the temperature measuring point is greater than a first temperature threshold value, the heater is controlled to stop heating, and when the temperature of the temperature measuring point is less than a second temperature threshold value, the heater is controlled to start heating; acquiring a preset second temperature sequence, wherein the second temperature sequence oscillates around a target temperature between the first temperature threshold and the second temperature threshold at a preset frequency; determining a degree of match between the first temperature sequence and the second temperature sequence; and controlling an output power of a power supply for supplying power to the heater based on the degree of matching.
According to the embodiment of the disclosure, the output power of the power supply can be regulated to enable the frequency of temperature change of the temperature measuring point to reach the expected requirement, so that the maintenance of the temperature environment of the satellite is facilitated, and the technical problem that the thermal control system in the prior art cannot control the frequency of temperature oscillation is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate and explain the present disclosure, and together with the description serve to explain the present disclosure. In the drawings:
FIG. 1 is a schematic diagram for implementing a thermal management system according to the prior art;
FIG. 2 is a schematic diagram of a change in temperature at a temperature measurement point in a thermal management system according to the prior art;
FIG. 3A is a schematic diagram showing temperature curves of different temperature changes of temperature measuring points;
FIG. 3B is a schematic diagram showing a temperature curve in which the temperature change at the temperature measurement point is too gentle;
FIG. 4 is a schematic diagram of a thermal management system according to embodiment 1 of the present disclosure;
FIG. 5 is a flow chart of a matching-based satellite thermal management method according to a first aspect of embodiment 1 of the present disclosure;
FIG. 6 shows a schematic diagram of a temperature profile based on the measured temperature sequence Qt 1 in example 1;
Fig. 7 shows a schematic diagram of a temperature profile based on the reference temperature sequence Qr in example 1;
FIG. 8A is a schematic diagram showing the temperature profile of the adjusted measured temperature sequence Qt 2 in example 1;
FIG. 8B shows a comparison of temperature curves of the measured temperature sequence Qt 1 before adjustment, the measured temperature sequence Qt 2 after adjustment, and the reference temperature sequence Qr in example 1;
fig. 9A shows a schematic diagram when the measured temperature sequence Qt 1 and the reference temperature sequence Qr are not aligned in example 1;
Fig. 9B shows a schematic diagram in which in embodiment 1, a first reference sample point is determined at a measured temperature sequence Qt 1 and a second reference sample point is determined at a reference temperature sequence Qr;
fig. 9C shows a schematic diagram when the measured temperature sequence Qt 1 is aligned with the reference temperature sequence Qr in example 1;
Fig. 10 shows a schematic diagram of a first candidate sample set PO 1,1～PO1.8 in which a temperature value equal to the target temperature Tref is determined in the measured temperature sequence Qt 1 and a second candidate sample set PO 2,1～PO2.5 in which a temperature value equal to the target temperature Tref is determined in the reference temperature sequence Qr in example 1;
FIG. 11 is a schematic diagram of a satellite thermal management device based on matching according to embodiment 2; and
Fig. 12 is a schematic diagram of a satellite thermal management device based on matching according to embodiment 3 of the present disclosure.
Detailed Description
In order to better understand the technical solutions of the present disclosure, the following description will clearly and completely describe the technical solutions of the embodiments of the present disclosure with reference to the drawings in the embodiments of the present disclosure. It will be apparent that the described embodiments are merely embodiments of a portion, but not all, of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure, shall fall within the scope of the present disclosure.
It should be noted that the terms "first," "second," and the like in the description and claims of the present disclosure and in the foregoing figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the disclosure described herein may be capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to the present embodiment, a thermal management method for a satellite system is provided. FIG. 4 illustrates a schematic diagram of a thermal management system that operates the thermal management method. Referring to fig. 4, the thermal management system 100 includes a processor 110, a temperature sensor 120, a heater 130, a power supply 140, a switch 150, and a pulse width modulator 160.
Wherein the temperature sensor 120 is disposed at a temperature measuring point corresponding to the heater 130, for measuring a temperature of the temperature measuring point. The heater 130 is connected to a power source 140 through a switch 150. The processor 110 is connected to the temperature sensor 120 and the switch 150, and controls on and off of the switch 150 according to temperature information received from the temperature sensor 120. And further controls the power supply 140 to supply power to the heater 130. The processor 110 is also connected to the power supply 140 through a pulse width modulator 160, so that the output electric power of the power supply 140 to the heater 130 is controlled through the pulse width modulator 160.
In the above-described operating environment, according to a first aspect of the present embodiment, there is provided a thermal management method for a satellite, which is implemented by the processor 110 shown in fig. 4. Fig. 5 shows a schematic flow chart of the method, and referring to fig. 5, the method includes:
S502: acquiring a first temperature sequence of a temperature measuring point corresponding to the heater in the process of controlling the heater to heat, wherein in the process of heating, the heater is controlled to stop heating when the temperature of the temperature measuring point is greater than a first temperature threshold value, and the heater is controlled to start heating when the temperature of the temperature measuring point is less than a second temperature threshold value;
s504: acquiring a preset second temperature sequence, wherein the second temperature sequence oscillates around the target temperature between a first temperature threshold and a second temperature threshold at a preset frequency;
S506: determining a degree of matching between the first temperature sequence and the second temperature sequence; and
S508: based on the degree of matching, the output power of a power supply for supplying power to the heater is controlled.
Specifically, referring to fig. 4, the processor 110 controls the heater 130 to perform heating, wherein, referring to fig. 2, the processor 110 acquires the temperature of the temperature measuring point through the temperature sensor 120 provided at the temperature measuring point corresponding to the heater 130 in the process of controlling the heater 130 to perform heating. As shown in fig. 2, when the temperature of the temperature measuring point increases over time to be greater than the first temperature threshold Tth 1, the processor 110 controls the heater 130 to stop heating through the switch 150. And, when the temperature of the temperature measuring point falls below the second temperature threshold Tth 2, the processor 110 controls the heater 130 to heat through the switch 150. So that the temperature of the temperature measuring point oscillates around the target temperature Tref over time.
Thus, in the first adjustment period in the process, the processor 110 acquires the measured temperature sequence Qt 1 (i.e., the first temperature sequence) of the temperature measurement point within the predetermined length period through the temperature sensor 120 (S502). Wherein, the measured temperature sequence Qt 1 includes a plurality of temperature values T 1,i which are detected at the temperature measuring points and are arranged in time sequence:
Wherein fig. 6 shows a schematic diagram of a temperature profile based on a measured temperature sequence Qt 1.
Then, the processor 110 acquires a preset reference temperature sequence Qr (i.e., a second temperature sequence) (S504). Wherein the reference temperature sequence Qr also includes a plurality of temperature values Tr i arranged in time sequence:
Further, referring to fig. 7, the reference temperature sequence Qr oscillates between the first temperature threshold value Tth 1 and the second temperature threshold value Tth 2 around the target temperature Tref at a preset frequency. For example, the maximum value of the reference temperature sequence Qr is the first temperature threshold Tth 1, and the minimum value is the second temperature threshold Tth 2.
Moreover, according to the technical scheme of the disclosure, the frequency of the reference temperature sequence Qr is a designated temperature change frequency which is beneficial to maintaining the environment in the satellite. For example, the reference temperature sequence Qr may be transmitted to the satellite by the ground system in a remote control manner so as to be previously set on the satellite.
The processor 110 then determines the degree of matching between the measured temperature sequence Qt 1 and the reference temperature sequence Qr. Specifically, the processor 110 may calculate the degree of matching between the measured temperature sequence Qt 1 and the reference temperature sequence Qr according to a formula for statistically solving the degree of matching. The specific calculation method will be described in detail later.
Then, the processor 110 controls the output power of the power supply 140 to the heater 130 according to the degree of matching. Specifically, when the matching degree is lower than the predetermined threshold value, it is explained that there is a large difference in the curve of the measured temperature sequence Qt 1 and the reference temperature sequence Qr.
Thus, the processor 110 adjusts the frequency of the temperature change at the temperature measurement point by controlling the output power of the power supply 140. Specifically, for example, the processor 110 may reduce the output power of the power supply 140 by reducing the output voltage of the power supply 140, or by reducing the output current of the power supply 140. So that the frequency of the temperature change of the temperature measuring point is adjusted downwards. So that the frequency of the temperature change of the temperature measuring point is closer to the reference temperature sequence Qr. Alternatively, the processor 110 may increase the output power of the power supply 140 by increasing the output voltage of the power supply 140, or by increasing the output current of the power supply 140. Thereby the change frequency of the temperature measuring point is improved. So that the change frequency of the temperature measuring point is more approximate to the reference temperature sequence Qr
That is, the present disclosure enables the temperature of the temperature measurement point to vary between the first temperature threshold value Tth 1 and the second temperature threshold value Tth 2 at a specified frequency and period by adjusting the output power of the power supply 140. Although the inventors have found that the frequency of oscillation of the temperature at the temperature measurement point is related to the power output by the power supply 140. However, since the environment where the satellite is located is more complex, it is difficult to set an optimal output power value so that the temperature of the temperature measuring point can be changed at an ideal frequency and period during the thermal management process.
Therefore, the technical scheme of the present disclosure deploys a reference temperature sequence Qr serving as a reference standard in the satellite in advance. Thus, by determining the degree of matching between the measured temperature sequence Qt 1 and the reference temperature sequence Qr of the temperature measurement point acquired from the temperature sensor 120 of the temperature measurement point, it can be determined whether there is a large difference between the measured temperature sequence Qt 1 and the reference temperature sequence Qr. Thus, when it is determined that there is a large difference between the measured temperature sequence Qt 1 and the reference temperature sequence Qr according to the degree of matching, the processor 110 adjusts the output power of the power supply 140, thereby changing the frequency of change of the temperature measuring point so that it is closer to the frequency of change of the reference temperature sequence Qr.
And then repeating the steps until the matching degree between the measured temperature sequence Qt 1 and the reference temperature sequence Qr meets the preset condition. Therefore, in this way, the technical scheme of the present disclosure can enable the frequency of the temperature change of the temperature measuring point to reach the desired requirement by adjusting the output power of the power supply 140, thereby being beneficial to maintaining the temperature environment of the satellite and solving the technical problem that the thermal control system in the prior art cannot control the frequency of the temperature oscillation.
It is also preferred that the processor 110 regulate the power supply 140 to first supply power to the heater 130 at an initial power that is greater than the target power (e.g., the initial power may be empirically predicted), and obtain a measured temperature sequence Qt 1 corresponding to the initial power via the temperature sensor 120.
Then, when the processor 110 determines that there is still a large difference in the matching degree between the measured temperature sequence Qt 1 and the reference temperature sequence Qr, the output power of the power supply 140 is reduced by a preset step power value. So that the processor 110 can receive a temperature sequence Qt 2 (i.e., a third temperature sequence) from the temperature sensor 120 that is closer to the reference temperature sequence Qr. The measurement temperature sequence Qt 2 includes a plurality of temperature values T 2,i, which are detected at the temperature measurement points and are arranged in time sequence:
For example, fig. 8A shows a schematic diagram of a temperature profile of the adjusted measured temperature sequence Qt 2. Further, fig. 8B shows a comparison of temperature curves of the temperature sequence Qt 1 before adjustment, the measured temperature sequence Qt 2 after adjustment, and the reference temperature sequence Qr. As can be seen from fig. 8A and 8B, the temperature profile of the adjusted measured temperature sequence Qt 2 is closer to the temperature profile of the reference temperature sequence Qr.
The processor 110 then repeats the above operation until the degree of matching between the measured temperature sequence received from the temperature sensor 120 and the reference temperature sequence Qr is greater than a predetermined degree of matching threshold.
Optionally, based on the matching degree, an operation of controlling output power of a power source for supplying power to the heater includes: in the case where the degree of matching is smaller than a preset degree of matching threshold, the output power of a power supply for supplying power to the heater is controlled. Specifically, after determining the degree of matching between the measured temperature sequence Qt 1 (i.e., the first temperature sequence) and the reference temperature sequence Qr (i.e., the second temperature sequence), the processor 110 compares the determined degree of matching with a predetermined degree of matching threshold. When the determined degree of matching is smaller than the degree of matching threshold, this means that there is a large difference between the measured temperature sequence Qt 1 and the reference temperature sequence Qr, so that the output power of the power supply 140 needs to be adjusted.
Optionally, controlling the operation of the output power of the power supply for powering the heater comprises: extracting frequency characteristic values of the first temperature sequence and the second temperature sequence; and decreasing the output power of the power supply if the frequency characteristic value of the first temperature sequence is greater than the frequency characteristic value of the second temperature sequence, or increasing the output power of the power supply if the frequency characteristic value of the first temperature sequence is less than the frequency characteristic value of the second temperature sequence.
Specifically, the processor 110 determines that the degree of matching between the measured temperature sequence Qt 1 and the reference temperature sequence Qr is less than a preset degree of matching threshold. First, the frequency characteristic value ω 1 of the measured temperature sequence Qt 1 and the frequency characteristic value ω r of the reference temperature sequence Qr are extracted. The method for extracting the frequency characteristic of the temperature sequence may be extracted by adopting the existing signal frequency analysis method, which is not described herein.
Then, the processor 110 compares the frequency characteristic value ω 1 of the measured temperature sequence Qt 1 with the frequency characteristic value ω r of the reference temperature sequence Qr. When the frequency characteristic value omega 1 of the measured temperature sequence Qt 1 is larger than the frequency characteristic value omega r of the reference temperature sequence Qr, it is indicated that the frequency of the temperature curve of the temperature measuring point is larger than the frequency of the temperature curve of the reference temperature sequence Qr. Therefore, in order to make the temperature curve of the temperature measuring point more consistent with the temperature curve of the reference temperature sequence Qr of the reference temperature sequence, the output power of the power supply 140 needs to be reduced, so that the temperature change of the temperature measuring point is more gentle.
On the contrary, when the frequency characteristic value ω 1 of the measured temperature sequence Qt 1 is smaller than the frequency characteristic value ω r of the reference temperature sequence Qr, it is indicated that the frequency of the temperature curve of the temperature measuring point is smaller than the frequency of the temperature curve of the reference temperature sequence Qr. Therefore, in order to make the temperature curve of the temperature measuring point more consistent with the temperature curve of the reference temperature sequence Qr of the reference temperature sequence, the output power of the power supply 140 needs to be increased, so that the frequency of the temperature change of the temperature measuring point is increased.
Therefore, by comparing the frequency characteristic value of the measured temperature sequence with the frequency characteristic value of the reference temperature sequence, whether the output power of the power supply 140 is higher or lower can be accurately judged according to the measured temperature sequence of the temperature measuring point, thereby facilitating the control of the heater 130 in the subsequent processing.
Optionally, the operation of determining the degree of matching between the first temperature sequence and the second temperature sequence comprises: determining a first reference sample point in the first temperature sequence and a second reference sample point in the second temperature sequence, wherein the first reference sample point corresponds to the second reference sample point; aligning the first temperature sequence and the second temperature sequence according to the first reference sample point and the second reference sample point; and determining the matching degree between the first temperature sequence and the second temperature sequence according to the temperature values of the aligned first temperature sequence and second temperature sequence.
Specifically, referring to fig. 9A, it is generally not aligned with the reference temperature sequence Qr. That is, there is a phase deviation between the measured temperature sequence Qt 1 and the reference temperature sequence Qr, resulting in misalignment between the measured temperature sequence Qt 1 and the reference temperature sequence Qr. In this case, if the matching degree between the measured temperature sequence Qt 1 and the reference temperature sequence Qr is directly calculated, the calculated matching degree is easily inaccurate.
In view of this, according to the technical solution of the present disclosure, the processor 110 first aligns the measured temperature sequence Qt 1 with the reference temperature sequence Qr during the operation of determining the degree of matching between the measured temperature sequence Qt 1 and the reference temperature sequence Qr.
Specifically, referring to fig. 9B, the processor 110 first determines a first reference sample point PO 1 in the measured temperature sequence Qt 1 and a second reference sample point PO 2 in the reference temperature sequence Qr. Wherein the first reference sample point PO 1 corresponds to the second reference sample point PO 2. For example, in the present embodiment, the first reference sample point PO 1 and the second reference sample point PO 2 may each be a sample point corresponding to the target temperature Tref.
Then, referring to fig. 9C, the processor 110 aligns the measured temperature sequence Qt 1 with the reference temperature sequence Qr according to the first reference sample point PO 1 and the second reference sample point PO 2. That is, the first reference sample point PO 1 is taken as the first sample point of the measurement temperature sequence Qt 1, and the second reference sample point PO 2 is taken as the first sample point of the reference temperature sequence Qr.
The processor 110 then determines a degree of matching between the measured temperature sequence Qt 1 and the reference temperature sequence Qr from the aligned measured temperature sequence Qt 1 and the reference temperature sequence Qr.
Thus, in this way, the phase difference between the measured temperature sequence Qt 1 and the reference temperature sequence Qr can be corrected, so that the determined degree of matching is more accurate.
Optionally, the operation of determining a first reference sample point in the first temperature sequence and a second reference sample point in the second temperature sequence comprises: determining a first set of candidate sample points in the first temperature sequence having a temperature value equal to the target temperature, and determining a second set of candidate sample points in the second temperature sequence having a temperature value equal to the target temperature; and determining a first reference sample point in the first set of candidate sample points and a second reference sample point in the second set of candidate sample points, wherein the first reference sample point and the second reference sample point have the same direction of slope.
Specifically, referring to fig. 10, in determining a first reference sample point in the measured temperature sequence Qt 1 (i.e., a first temperature sequence) and a reference sample point in the reference temperature sequence Qr (i.e., a second temperature sequence), the processor 110 first determines a first candidate sample set PO 1,1～PO1.8 having a temperature value equal to the target temperature Tref in the measured temperature sequence Qt 1 and determines a second candidate sample set PO 2,1～PO2.5 having a temperature value equal to the target temperature Tref in the reference temperature sequence Qr.
The processor 110 then determines a first reference sample point in the first candidate sample set PO 1,1～PO1.8 and a second reference sample point in the second candidate sample set. Wherein the slope direction of the first reference sample point is the same as the slope direction of the second reference sample point. For example, referring to fig. 10, the candidate sample points PO 1,1 in the first candidate sample set are in the same slope direction (positive slope) as the candidate sample points PO 2,1 in the second candidate sample set. The candidate sample point PO 1,1 may thus be determined as a first reference sample point, while the candidate sample point PO 2,1 may be determined as a corresponding second reference sample point.
In addition, the candidate sample points PO 1,2 in the first candidate sample set have the same slope direction as the candidate sample points PO 2,2 in the second candidate sample set (both slopes are negative). The candidate sample point PO 1,2 may thus be determined as a first reference sample point, while the candidate sample point PO 2,2 may be determined as a corresponding second reference sample point. And so on.
Therefore, through the mode, the proper reference sample point can be selected from the measured temperature sequence Qt 1 and the reference temperature sequence Qr for alignment operation, so that the matching degree calculation performed after alignment can be ensured to reflect the approximation between the measured temperature sequence and the reference temperature sequence more accurately. Further, as an exemplary illustration, the present disclosure aligns a measured temperature sequence with a reference temperature sequence in the manner shown in fig. 9C.
Optionally, the operation of determining the degree of matching between the first temperature sequence and the second temperature sequence according to the aligned temperature values of the first temperature sequence and the second temperature sequence includes calculating the degree of matching between the first temperature sequence and the second temperature sequence according to the following formula:
Wherein,
R represents the matching degree between the aligned first temperature sequence and the aligned second temperature sequence;
T 1,i denotes the consecutive n sample points in the aligned first temperature sequence starting from the first reference sample point; and
T 2,i denotes the consecutive n sample points in the aligned second temperature sequence starting from the second reference sample point.
Specifically, reference is made to fig. 9C. The processor 110 aligns the measured temperature sequence Qt 1 (i.e., the first temperature sequence) with the reference temperature sequence Qr (i.e., the second temperature sequence).
Then, the degree of matching between the aligned measured temperature sequence Qt 1 and the reference temperature sequence Qr is calculated. Specifically, for example, the processor 110 extracts n consecutive sample points from the measured temperature sequence Qt 1 with the first reference sample point PO 1 as T 1,1. Taking the second reference sample point PO 2 as T 2,1, n consecutive sample points are extracted from the measured temperature sequence Qr. Thus, the sample points T 1,i extracted from the measured temperature sequence Qt 1 correspond one-to-one (1.ltoreq.i.ltoreq.n) with the sample points T 2,i extracted from the reference temperature sequence Qr.
Then, the processor 110 calculates the degree of matching between the measured temperature sequence Qt 1 and the reference temperature sequence Qr according to the following equation (1):
wherein, R represents the matching degree between the first temperature sequence and the second temperature sequence after alignment.
Thus, when the measured temperature sequence Qt 1 and the reference temperature sequence Qr are completely coincident, the matching degree R obtains a maximum value of 1. And as the deviation between the measured temperature sequence Qt 1 and the reference temperature sequence Qr is larger, the value of the matching degree R is smaller.
Thus, when the calculated matching degree R is greater than a predetermined threshold (e.g., 0.9), the technical solution according to the present disclosure means that the measured temperature sequence Qt 1 and the reference temperature sequence Qr are matched, so that the output power of the power supply 140 is stopped to be regulated at this time, and thus the operation of the heater 130 reaches a stable state.
According to the technical scheme of the disclosure, the matching degree between the measured temperature sequence and the reference temperature sequence can be determined by calculating the matching degree, and the output power of the power supply 140 is adjusted according to the matching degree, so that the output power of the power supply 140 can be accurately adjusted to an ideal state, and the heater 130 can work in the ideal state.
Optionally, based on the matching degree, an operation of controlling output power of a power source for supplying power to the heater includes: the output power of the power supply is controlled by means of pulse width modulation.
Specifically, referring to fig. 4, the processor 110 is also connected to the power supply 140 through a pulse width modulator 160, so that the output electric power of the power supply 140 to the heater 130 is controlled through the pulse width modulator 160. So that the output power of the power supply 140 can be controlled by the pulse width modulator 160. So that in this way the output power of the power supply 140 can be controlled more accurately.
Further, according to a second aspect of the present embodiment, there is provided a storage medium. The storage medium includes a stored program, wherein the method of any one of the above is performed by a processor when the program is run.
Therefore, according to the embodiment, the output power of the power supply can be regulated to enable the frequency of temperature change of the temperature measuring point to reach the expected requirement, so that the maintenance of the temperature environment of the satellite is facilitated, and the technical problem that the thermal control system in the prior art cannot control the frequency of temperature oscillation is solved.
It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present invention is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present invention. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present invention.
From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software plus the necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
Example 2
Fig. 11 shows a satellite thermal management apparatus 1100 based on matching degree according to the present embodiment, the apparatus 1100 corresponding to the method according to the first aspect of embodiment 1. Referring to fig. 11, the apparatus 1100 includes: a first temperature sequence obtaining module 1110, configured to obtain a first temperature sequence of a temperature measurement point corresponding to the heater during heating by controlling the heater, wherein during heating, when the temperature of the temperature measurement point is greater than a first temperature threshold, the heater is controlled to stop heating, and when the temperature of the temperature measurement point is less than a second temperature threshold, the heater is controlled to start heating; a second temperature sequence acquisition module 1120 configured to acquire a preset second temperature sequence, where the second temperature sequence oscillates around the target temperature between a first temperature threshold and a second temperature threshold at a preset frequency; a matching degree determining module 1130, configured to determine a matching degree between the first temperature sequence and the second temperature sequence; and a power control module 1140 for controlling an output power of a power source for supplying power to the heater based on the degree of matching.
Optionally, the power control module 1140 includes: and the power control sub-module is used for controlling the output power of a power supply for supplying power to the heater under the condition that the matching degree is smaller than a preset matching degree threshold value.
Optionally, the power control module 1140 includes: the frequency characteristic extraction submodule is used for extracting frequency characteristic values of the first temperature sequence and the second temperature sequence; and a power control sub-module for reducing the output power of the power supply if the frequency characteristic value of the first temperature sequence is greater than the frequency characteristic value of the second temperature sequence, or increasing the output power of the power supply if the frequency characteristic value of the first temperature sequence is less than the frequency characteristic value of the second temperature sequence.
Optionally, the matching degree determining module 1130 includes: a reference sample point determination sub-module for determining a first reference sample point in a first temperature sequence and a second reference sample point in a second temperature sequence, wherein the first reference sample point corresponds to the second reference sample point; an alignment sub-module for aligning the first temperature sequence and the second temperature sequence according to the first reference sample point and the second reference sample point; and the matching degree determining submodule is used for determining the matching degree between the first temperature sequence and the second temperature sequence according to the temperature values of the aligned first temperature sequence and second temperature sequence.
Optionally, the reference sample point determining submodule includes: a candidate sample set determining unit configured to determine a first candidate sample point set having a temperature value equal to a target temperature in a first temperature sequence, and determine a second candidate sample point set having a temperature value equal to the target temperature in a second temperature sequence; and a reference sample point determination unit configured to determine a first reference sample point in the first candidate sample point set and a second reference sample point in the second candidate sample point set, wherein the first reference sample point and the second reference sample point have the same slope direction.
Optionally, the reference sample point determining submodule includes a reference sample point determining unit for calculating the degree of matching between the first temperature sequence and the second temperature sequence according to the following formula:
Wherein,
R represents the matching degree between the aligned first temperature sequence and the aligned second temperature sequence;
T 1,i denotes the consecutive n sample points in the aligned first temperature sequence starting from the first reference sample point; and
T 2,i denotes the consecutive n sample points in the aligned second temperature sequence starting from the second reference sample point.
Optionally, the power control module 1140 includes: and the pulse width modulation control sub-module is used for controlling the output power of the power supply in a pulse width modulation mode.
Therefore, according to the embodiment, the output power of the power supply can be regulated to enable the frequency of temperature change of the temperature measuring point to reach the expected requirement, so that the maintenance of the temperature environment of the satellite is facilitated, and the technical problem that the thermal control system in the prior art cannot control the frequency of temperature oscillation is solved.
Example 3
Fig. 12 shows a satellite thermal management apparatus 1200 based on matching degree according to the present embodiment, the apparatus 1200 corresponding to the method according to the first aspect of embodiment 1. Referring to fig. 12, the apparatus 1200 includes: comprising the following steps: a processor 1210; and a memory 1220, coupled to the processor, for providing instructions to the processor for processing the steps of: acquiring a first temperature sequence of a temperature measuring point corresponding to the heater in the process of controlling the heater to heat, wherein in the process of heating, the heater is controlled to stop heating when the temperature of the temperature measuring point is greater than a first temperature threshold value, and the heater is controlled to start heating when the temperature of the temperature measuring point is less than a second temperature threshold value; acquiring a preset second temperature sequence, wherein the second temperature sequence oscillates around the target temperature between a first temperature threshold and a second temperature threshold at a preset frequency; determining a degree of matching between the first temperature sequence and the second temperature sequence; and controlling an output power of a power supply for supplying power to the heater based on the degree of matching.
Optionally, based on the matching degree, an operation of controlling output power of a power source for supplying power to the heater includes: in the case where the degree of matching is smaller than a preset degree of matching threshold, the output power of a power supply for supplying power to the heater is controlled.
Optionally, controlling the operation of the output power of the power supply for powering the heater comprises: extracting frequency characteristic values of the first temperature sequence and the second temperature sequence; and decreasing the output power of the power supply if the frequency characteristic value of the first temperature sequence is greater than the frequency characteristic value of the second temperature sequence, or increasing the output power of the power supply if the frequency characteristic value of the first temperature sequence is less than the frequency characteristic value of the second temperature sequence.
Optionally, the operation of determining the degree of matching between the first temperature sequence and the second temperature sequence comprises: determining a first reference sample point in the first temperature sequence and a second reference sample point in the second temperature sequence, wherein the first reference sample point corresponds to the second reference sample point; aligning the first temperature sequence and the second temperature sequence according to the first reference sample point and the second reference sample point; and determining the matching degree between the first temperature sequence and the second temperature sequence according to the temperature values of the aligned first temperature sequence and second temperature sequence.
Optionally, the operation of determining a first reference sample point in the first temperature sequence and a second reference sample point in the second temperature sequence comprises: determining a first set of candidate sample points in the first temperature sequence having a temperature value equal to the target temperature, and determining a second set of candidate sample points in the second temperature sequence having a temperature value equal to the target temperature; and determining a first reference sample point in the first set of candidate sample points and a second reference sample point in the second set of candidate sample points, wherein the first reference sample point and the second reference sample point have the same direction of slope.
Optionally, the operation of determining the degree of matching between the first temperature sequence and the second temperature sequence according to the aligned temperature values of the first temperature sequence and the second temperature sequence includes calculating the degree of matching between the first temperature sequence and the second temperature sequence according to the following formula:
Wherein,
R represents the matching degree between the aligned first temperature sequence and the aligned second temperature sequence;
T 1,i denotes the consecutive n sample points in the aligned first temperature sequence starting from the first reference sample point; and
T 2,i denotes the consecutive n sample points in the aligned second temperature sequence starting from the second reference sample point.
Optionally, based on the matching degree, an operation of controlling output power of a power source for supplying power to the heater includes: the output power of the power supply is controlled by means of pulse width modulation.
Therefore, according to the embodiment, the output power of the power supply can be regulated to enable the frequency of temperature change of the temperature measuring point to reach the expected requirement, so that the maintenance of the temperature environment of the satellite is facilitated, and the technical problem that the thermal control system in the prior art cannot control the frequency of temperature oscillation is solved.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present invention, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, such as the division of the units, is merely a logical function division, and may be implemented in another manner, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. A satellite thermal management method based on matching, comprising:
Acquiring a first temperature sequence of a temperature measuring point corresponding to a heater in the process of controlling the heater to heat, wherein in the process of heating, when the temperature of the temperature measuring point is greater than a first temperature threshold value, the heater is controlled to stop heating, and when the temperature of the temperature measuring point is less than a second temperature threshold value, the heater is controlled to start heating;
Acquiring a preset second temperature sequence, wherein the second temperature sequence oscillates around a target temperature between the first temperature threshold and the second temperature threshold at a preset frequency;
determining a degree of match between the first temperature sequence and the second temperature sequence; and
Controlling an output power of a power source for supplying power to the heater based on the degree of matching, and wherein,
Based on the degree of matching, an operation of controlling output power of a power source for supplying power to the heater, comprising: controlling an output power of a power supply for supplying power to the heater in a case where the degree of matching is smaller than a preset degree of matching threshold, and wherein,
An operation of controlling output power of a power supply for supplying power to the heater, comprising:
extracting frequency characteristic values of the first temperature sequence and the second temperature sequence; and
The output power of the power supply is reduced if the frequency characteristic value of the first temperature sequence is greater than the frequency characteristic value of the second temperature sequence, or is increased if the frequency characteristic value of the first temperature sequence is less than the frequency characteristic value of the second temperature sequence.
2. The method of claim 1, wherein determining a degree of match between the first temperature sequence and the second temperature sequence comprises:
Determining a first reference sample point in the first temperature sequence and a second reference sample point in the second temperature sequence, wherein the first reference sample point corresponds to the second reference sample point;
Aligning the first temperature sequence and the second temperature sequence according to the first reference sample point and the second reference sample point; and
And determining the matching degree between the first temperature sequence and the second temperature sequence according to the aligned temperature values of the first temperature sequence and the second temperature sequence.
3. The method of claim 2, wherein determining a first reference sample point in the first temperature sequence and a second reference sample point in the second temperature sequence comprises:
Determining a first set of candidate sample points in the first temperature sequence having a temperature value equal to the target temperature, and determining a second set of candidate sample points in the second temperature sequence having a temperature value equal to the target temperature; and
Determining the first reference sample point in the first candidate sample point set and the second reference sample point in the second candidate sample point set, wherein the first reference sample point and the second reference sample point have the same slope direction.
4. A method according to claim 3, wherein determining the degree of matching between the first and second temperature sequences from the aligned temperature values of the first and second temperature sequences comprises calculating the degree of matching between the first and second temperature sequences according to the following formula:
；
Wherein,
R represents the matching degree between the first temperature sequence and the second temperature sequence after alignment;
Representing consecutive n sample points in the aligned first temperature sequence starting from the first reference sample point; and
Representing consecutive n sample points in the aligned second temperature sequence starting from the second reference sample point.
5. The method of claim 1, wherein controlling operation of the output power of a power supply for powering the heater based on the degree of matching comprises: and controlling the output power of the power supply by a pulse width modulation mode.
6. A storage medium comprising a stored program, wherein the method of any one of claims 1 to 5 is performed by a processor when the program is run.
7. A satellite thermal management device based on matching, comprising:
a first temperature sequence obtaining module, configured to obtain a first temperature sequence of a temperature measurement point corresponding to a heater during heating by controlling the heater, wherein during the heating, when the temperature of the temperature measurement point is greater than a first temperature threshold, the heater is controlled to stop heating, and when the temperature of the temperature measurement point is less than a second temperature threshold, the heater is controlled to start heating;
A second temperature sequence acquisition module for acquiring a preset second temperature sequence, wherein the second temperature sequence oscillates around a target temperature between the first temperature threshold and the second temperature threshold at a preset frequency;
the matching degree determining module is used for determining the matching degree between the first temperature sequence and the second temperature sequence; and
A power control module for controlling output power of a power source for supplying power to the heater based on the degree of matching, and wherein
The power control module includes: a power control sub-module for controlling output power of a power supply for supplying power to the heater in case that the degree of matching is smaller than a preset degree of matching threshold, and wherein,
The power control module includes: the frequency characteristic extraction submodule is used for extracting frequency characteristic values of the first temperature sequence and the second temperature sequence; and a power control sub-module for reducing the output power of the power supply if the frequency characteristic value of the first temperature sequence is greater than the frequency characteristic value of the second temperature sequence, or increasing the output power of the power supply if the frequency characteristic value of the first temperature sequence is less than the frequency characteristic value of the second temperature sequence.
8. A satellite thermal management device based on matching, comprising:
a processor; and
A memory, coupled to the processor, for providing instructions to the processor to process the following processing steps:
Acquiring a first temperature sequence of a temperature measuring point corresponding to a heater in the process of controlling the heater to heat, wherein in the process of heating, when the temperature of the temperature measuring point is greater than a first temperature threshold value, the heater is controlled to stop heating, and when the temperature of the temperature measuring point is less than a second temperature threshold value, the heater is controlled to start heating;
Acquiring a preset second temperature sequence, wherein the second temperature sequence oscillates around a target temperature between the first temperature threshold and the second temperature threshold at a preset frequency;
determining a degree of match between the first temperature sequence and the second temperature sequence; and
Controlling an output power of a power source for supplying power to the heater based on the degree of matching, and wherein,
Based on the degree of matching, an operation of controlling output power of a power source for supplying power to the heater, comprising: controlling an output power of a power supply for supplying power to the heater in a case where the degree of matching is smaller than a preset degree of matching threshold, and wherein,
An operation of controlling output power of a power supply for supplying power to the heater, comprising:
extracting frequency characteristic values of the first temperature sequence and the second temperature sequence; and
The output power of the power supply is reduced if the frequency characteristic value of the first temperature sequence is greater than the frequency characteristic value of the second temperature sequence, or is increased if the frequency characteristic value of the first temperature sequence is less than the frequency characteristic value of the second temperature sequence.
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