CN113624677B - Attachment coefficient utilization rate testing method, system, equipment and storage medium - Google Patents
Attachment coefficient utilization rate testing method, system, equipment and storage medium Download PDFInfo
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Abstract
The invention provides a method for testing the utilization rate of an attachment coefficient, which comprises the steps of establishing communication with a tested vehicle control system; selecting a single wheel axle of a tested vehicle as a single-axle braking wheel axle and generating a single-axle braking control command, and simultaneously setting a plurality of slip rates to be tested to generate a plurality of target slip rates corresponding to the single-axle braking control command; sequentially sending a single-axis braking control command and a target slip rate to the vehicle control system, respectively obtaining a plurality of braking times of the tested vehicle, which are respectively braked based on the single-axis braking control command and the target slip rate, and obtaining optimal braking time based on the plurality of braking times; the other wheel axles of the tested vehicle are switched one by one until the optimal braking time of each wheel axle is obtained to calculate the utilization rate of the adhesion coefficient. The method utilizes a vehicle control system of a decoupling braking system, realizes single-axle braking by sending a control instruction to the vehicle control system, and also realizes automatic test of the utilization rate of the attachment coefficient by the calculation capability of the vehicle control system on the wheel speed and the slip rate.
Description
Technical Field
The present invention relates to the field of vehicle detection, and in particular, to a method, a system, an apparatus, and a storage medium for testing an adhesion coefficient utilization rate.
Background
The adhesion coefficient utilization rate Epsilon (Epsilon) is an important braking system parameter required by regulations such as GB21670 (5.6.4) and ECE-R13h, and is mainly used for testing whether the adhesion coefficient provided by the braking system on the ground is fully utilized (the regulation requirement Epsilon is more than or equal to 75%).
The traditional test method is to add a tee joint through a brake pipeline or control a front axle and a rear axle to independently brake through an ESC module, measure the braking time of 40km/h to 20km/h, calculate the braking intensity and finally measure and calculate the ground attachment coefficient, and in the process of independently braking the front axle and the rear axle, a driver is required to control the optimal slip rate according to the driving experience, wheels cannot be locked and constant braking force is maintained.
However, in the implementation process of the test method, as tee joints are required to be added or the ESC module is used for carrying out single-shaft braking, the operation process is troublesome, so that the efficiency is low, and on the other hand, the operation dependence on a driver in the single-shaft braking process of the test method is large, so that the accuracy and the reliability of the test result are directly influenced by the operation skill of the driver.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide a method, a system, equipment and a storage medium for testing the utilization rate of an attachment coefficient. The method specifically comprises the following steps:
s1, establishing communication with a tested vehicle control system;
s2, selecting a single wheel axle of the tested vehicle as a single-axle braking wheel axle, generating a single-axle braking control command, and simultaneously setting a plurality of slip rates to be tested to generate a plurality of target slip rates corresponding to the single-axle braking control command;
s3, when the vehicle speed is increased to a preset value, sequentially sending a single-axle braking control command and a target slip rate to the vehicle control system, and respectively obtaining a plurality of braking times of the tested vehicle fed back by the vehicle control system, wherein the braking times are respectively braked based on the single-axle braking control command and the target slip rates;
s4, based on the plurality of braking times, acquiring the minimum value of the braking times as the optimal braking time;
s5, returning to S2, and switching other wheel axles of the tested vehicle one by one to serve as single-axle braking wheel axles until the optimal braking time of each wheel axle serving as the single-axle braking wheel axle is obtained;
s6, obtaining the utilization rate of the adhesion coefficient based on the obtained optimal braking time of the independent braking of each wheel axle.
Further, the specific process of acquiring the plurality of braking times in step S3 is as follows:
based on detection of a wheel speed of a braking process by a vehicle control system, acquiring a slip rate of the braking process in real time, and controlling wheel cylinder pressure of a braking wheel shaft through deviation of the slip rate of the braking process and the target slip rate so as to keep the wheel shaft to brake respectively according to the target slip rates; the method comprises the steps of,
based on detection and record of the vehicle speed in the braking process by the vehicle control system, the braking time of the detected vehicle from the first preset vehicle speed to the second preset vehicle speed is respectively obtained.
Preferably, the wheel cylinder pressure of the brake wheel shaft is controlled by a deviation of the brake process slip rate from the target slip rate, specifically:
when the slip rate in the braking process is higher than the preset upper limit of the target slip rate, controlling a pressure reducing unit to regulate and control the pressure of a wheel cylinder of a target braking wheel shaft through the vehicle control system;
when the slip rate in the braking process is higher than the preset lower limit of the target slip rate, the vehicle control system controls the pressurizing unit to regulate and control the pressure of the wheel cylinder of the target braking wheel shaft.
Preferably, the specific manner of setting the plurality of slip ratios to be measured in step S2 is as follows: and gradually increasing the sliding rate according to a set gradient until the sliding rate test interval is traversed by taking the minimum value of the sliding rate as an initial value in the test interval.
In a second aspect, the present invention further provides a system for testing the utilization of an attachment coefficient, the system comprising:
the communication module is used for establishing an instruction transmission and information interaction communication path with the vehicle control system;
the wheel axle switching module is used for selecting single wheel axles from the wheel axles of the tested vehicle one by one to serve as single-axle braking wheel axles;
the single-axle braking control module is used for sending a single-axle braking control instruction to the vehicle control system so as to enable the vehicle control system to perform single-axle braking according to a set wheel axle;
the slip rate control module is used for gradually issuing a target slip rate to the vehicle control system so as to gradually brake the single-shaft brake wheel shaft according to the set slip rate;
the braking time analysis module is used for receiving the braking time recorded and fed back by the vehicle control system and acquiring the optimal braking time of each wheel axle based on the braking time;
and the adhesion coefficient utilization rate calculation module is used for receiving the optimal braking time fed back by the braking time analysis module and obtaining the adhesion coefficient utilization rate according to a set calculation rule.
Preferably, the test system further comprises a display control module for displaying a control interface, process parameters in the test process and test results.
In a third aspect of the invention, an electronic device is provided, comprising a processor and a memory;
the memory stores at least one instruction or code set of at least one section of program;
the code set of at least one instruction or at least one program is loaded and executed by the processor, to implement the method for testing the utilization rate of the adhesion coefficient according to any one of the above.
Preferably, the electronic device further comprises a display and an input device, wherein the display is used for displaying the process parameters related to the testing method and the testing result; the input device is a touch input device or a key input device.
In a fourth aspect of the present invention, a storage medium is provided that includes instructions that, when executed on an electronic device, cause the electronic device to perform the above-described method of testing the utilization of an attachment coefficient.
By adopting the technical scheme, the adhesion coefficient utilization rate testing method, the adhesion coefficient utilization rate testing system, the adhesion coefficient utilization rate testing equipment and the storage medium have the following beneficial effects:
1. according to the adhesion coefficient utilization rate testing method provided by the invention, the characteristic that the brake master cylinder and the booster cylinder of the decoupling brake system are decoupled is utilized, the control of single-shaft braking is realized by sending a control command to the ECU control system, and the optimal braking time is obtained by the processing capability of the wheel speed and the calculation capability of the slip rate of the wheel speed, so that the adhesion coefficient utilization rate is calculated.
2. The system for testing the utilization rate of the adhesion coefficient can be used for executing automatic testing of the utilization rate of the adhesion coefficient.
3. The electronic equipment provided by the invention is loaded with the relevant instructions or codes of the adhesion coefficient utilization rate testing method, and can be used as the adhesion coefficient utilization rate testing equipment.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the following description will make a brief introduction to the drawings used in the description of the embodiments or the prior art. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a method for testing adhesion coefficient utilization according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for implementing an attachment coefficient utilization rate test by an upper computer according to an embodiment of the present invention;
fig. 3 is an application architecture diagram of an embodiment of the present invention for adhesion coefficient utilization testing using a host computer test system.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above 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 invention described herein may be implemented in sequences other than those illustrated or otherwise 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, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or device.
Example 1
The embodiment provides a method for testing the utilization rate of an adhesion coefficient, as shown in fig. 1, and the embodiment provides a logic schematic diagram of the method for testing the utilization rate of the adhesion coefficient, which specifically comprises the following steps:
s1, establishing communication with a tested vehicle control system; the vehicle control system of the invention refers to an ECU control system;
s2, selecting a single wheel axle of the tested vehicle as a single-axle braking wheel axle, generating a single-axle braking control command, and simultaneously setting a plurality of slip rates to be tested to generate a plurality of target slip rates corresponding to the single-axle braking control command; the specific mode for setting the slip ratios to be tested is as follows: and gradually increasing the sliding rate according to a set gradient until the sliding rate test interval is traversed by taking the minimum value of the sliding rate as an initial value in the test interval.
S3, when the vehicle speed is increased to a preset value, sequentially sending a single-shaft braking control command and a target slip rate to the ECU control system, and respectively obtaining a plurality of braking times of the tested vehicle fed back by the ECU control system based on the single-shaft braking control command and the target slip rates; in particular, the specific process of acquiring a plurality of braking times is:
based on the detection of the ECU control system to the braking process wheel speed, the braking process slip rate is obtained in real time, and the wheel cylinder pressure of a braking wheel shaft is controlled through the deviation of the braking process slip rate and the target slip rate so as to keep the wheel shaft to respectively brake according to the target slip rates; the method comprises the steps of,
based on detection and record of the vehicle speed in the braking process by the ECU control system, the braking time of the detected vehicle from the first preset vehicle speed to the second preset vehicle speed is respectively obtained.
In the implementation process, the wheel cylinder pressure of the brake wheel shaft is controlled by the deviation of the slip rate in the braking process and the target slip rate, specifically:
when the slip rate in the braking process is higher than the preset upper limit of the target slip rate, the ECU control system controls the pressure reducing unit to regulate and control the pressure of the wheel cylinder of the target braking wheel shaft;
and when the slip rate in the braking process is higher than the preset lower limit of the target slip rate, controlling a pressurizing unit to regulate and control the wheel cylinder pressure of the target braking wheel shaft through the ECU control system.
S4, based on the plurality of braking times, acquiring the minimum value of the braking times as the optimal braking time;
it should be noted that, the minimum value obtaining manner may be set to obtain the minimum value of the plurality of braking times, and three test values between the minimum value and the minimum value of 1.05 times are selected by using the minimum value as the reference point, and the arithmetic average value thereof is taken as the optimal braking time. One skilled in the art may select one of the ways to obtain the minimum value in S4 as the optimal braking time based on the test situation.
In one embodiment of the invention it may be provided that: the test interval of the slip rate is 10% -20%, according to gradient of 1%, the slip rate to be measured (including 10%,11%,12%. 20%) is obtained, 11 target slip rates corresponding to the single-shaft braking control instruction are correspondingly generated, in the test process, the target slip rates are sequentially issued to an ECU control system of a tested vehicle, the ECU control system controls a decoupling braking system to execute a single shaft according to the target slip rates, and after 11 tests are completed, 11 braking times corresponding to the 11 target slip rates are obtained and uploaded to the test system; the test system obtains the minimum value from the 11 braking times as the optimal braking time.
S5, returning to the step S2, and switching other wheel axles of the tested vehicle one by one to serve as single-axle braking wheel axles until the optimal braking time of each wheel axle serving as the single-axle braking wheel axle is obtained;
the step is a cyclic test process, the number of cycles depends on the number of wheel axles of a tested vehicle, taking the tested vehicle with a front axle and a rear axle as an example, selecting the front axle as a single-axle brake wheel axle in the first step S2, obtaining the optimal braking time of the front axle, and returning to the step S2 only by completing the repeated test process of selecting the rear axle as the single-axle brake wheel axle. If the tested vehicle also comprises a central shaft or more other wheel shafts, multiple times of circulation are needed until the testing process of each wheel shaft of the tested vehicle as a single-shaft brake wheel shaft is completed.
S6, obtaining the utilization rate of the adhesion coefficient based on the obtained optimal braking time of the independent braking of each wheel axle.
It should be noted that, the specific calculation rule refers to the calculation process setting of the utilization rate of the road adhesion coefficient of GB21670, and the calculation rule can be set for the tested vehicles equipped with the anti-lock braking systems of class 1 and class 2 according to the following parameters and calculation relations:
for the sake of more clear description, the optimal braking time t in the present embodiment m The brake time analysis module obtains the optimal brake time t of the front axle during the single-axle brake of the front axle m The method comprises the steps of carrying out a first treatment on the surface of the Correspondingly, when the rear axle is braked uniaxially, the braking time analysis module acquires the optimal braking time t of the rear axle m 。
Calculating the braking strength of the front axle and the rear axle, and optimizing the braking time t through the front axle m And the optimal braking time t of the rear axle m The braking strength of the front axle and the rear axle are respectively obtained:
the dynamic axle load of the braking force machine is calculated according to the measured braking strength and the rolling resistance of the non-braking wheels, and a rear axle driven two-axle vehicle is taken as an example:
when the front axle is braked,
F f ＝z m ×P×g-0.015 F 2
front axle dynamic axle load:
when the rear axle is braked,
Fr＝z m ×P×g-0.010 F 1
rear axle dynamic axle load:
wherein z is AL Calculating the maximum braking strength: and braking at an initial speed of 55km/h, and measuring the time of 15km/h from 45km/h, wherein the full cycle of the anti-lock braking system is ensured in the braking process. Taking the average t of three tests m Obtained by the formula:
the adhesion coefficients of the front axle and the rear axle and the adhesion coefficient of the whole automobile are calculated respectively, and the k value is rounded to the micrometer position:
front axle attachment coefficient:
rear axle attachment coefficient
For the tested vehicles equipped with the anti-lock braking systems of type 1 and type 2,
adhesion coefficient utilization rate:
where p=vehicle weight, g=gravitational acceleration, f1=front axle weight, f2=rear axle weight, h=vehicle center of gravity height, e=vehicle wheelbase.
In particular, the calculation rule of the adhesion coefficient utilization rate calculation module is not limited to the rule of assembling the anti-lock braking systems of class 1 and class 2 listed here, but may be a calculation rule of other anti-lock braking systems set with reference to the regulation of the road adhesion coefficient utilization rate of GB 21670.
In particular, maximum braking strength z AL The data obtained by the advanced test may be pre-stored in the adhesion coefficient utilization rate calculation module of the upper computer, or may be obtained by adjusting the braking speed range test based on the upper computer of the embodiment.
Example 2
The embodiment provides an embodiment of a host computer test system, and the host computer test system completes the test of the utilization rate of the adhesion coefficient of the tested vehicle by executing the method of the embodiment 1. The specific mode of implementing the test method and completing the utilization rate of the tested vehicle attachment coefficient by the upper computer test system is described in detail as follows:
fig. 3 provides an application architecture diagram of an embodiment of the adhesion coefficient utilization test using the upper computer test system of the present invention, showing the upper computer test system of the present invention and related modules of a vehicle under test of an embodiment, wherein,
the tested vehicle is provided with a decoupled braking system, the ECU control system can control the decoupled braking system to execute a braking process, the decoupled braking system has the characteristic of decoupling a brake master cylinder from a power cylinder, and the brake system can perform active linear pressurization independently through the power cylinder and realize independent control of four wheels; meanwhile, the ECU control system also has the capability of processing the wheel speed of the wheel and calculating the slip rate.
The upper computer test system comprises a communication module, a wheel axle switching module, a single-shaft braking control module, a slip rate control module, a braking time analysis module and an attachment coefficient utilization rate calculation module. In order to better explain the test system and the test method of the present embodiment, a specific description is given of a flowchart of a method for implementing an attachment coefficient utilization rate test by an upper computer in connection with an embodiment shown in fig. 2:
when the test is started, the upper computer test system establishes a communication path with the ECU control system of the tested vehicle through the communication module, the communication mode provided in the embodiment is UDS communication, and the communication module establishes UDS communication connection with the ECU control system and is used for establishing instruction transmission and information interaction with the ECU control system of the tested vehicle.
And selecting a brake wheel shaft to generate a single-shaft brake control command through a wheel shaft switching module and correspondingly generating a plurality of target slip rates.
When the vehicle speed is increased to a preset vehicle speed, a single-axle braking control command is issued to the ECU control system of the tested vehicle through the single-axle braking control module, and meanwhile, a target slip rate is issued to the ECU control system of the tested vehicle through the slip rate control module.
And the ECU control system of the tested vehicle receives the single-axle braking control instruction and controls the decoupling braking system to realize the single-axle braking of the tested vehicle according to the target slip rate. Specifically, the ECU control system detects the speed of a braking process wheel, acquires the slip rate of the braking process from time to time, and controls the wheel cylinder pressure of a braking wheel shaft through the deviation of the slip rate of the braking process and the target slip rate so as to keep the wheel shaft to brake according to the target slip rate. To achieve this, one possible way is to: when the slip rate in the braking process is detected to be higher than the preset upper limit of the target slip rate, the ECU control system controls the pressure reducing unit to regulate and control the pressure of the wheel cylinder of the target braking wheel shaft; and when the slip rate in the braking process is higher than the preset lower limit of the target slip rate, controlling a pressurizing unit to regulate and control the wheel cylinder pressure of the target braking wheel shaft through the ECU control system.
Specifically, the ECU control system of the vehicle under test acquires the braking time simultaneously during the front axle braking process, and feeds back the acquired braking time to the braking time analysis module. The implementation process is that the ECU control system can detect the speed of the braking process, record and feed back the braking time of the detected vehicle from the first preset speed to the second preset speed, wherein the first preset speed is 40km/h, and the second preset speed is 20km/h.
And the braking time analysis module is used for receiving the braking time recorded and fed back by the ECU control system and acquiring the optimal braking time of each wheel axle based on the braking time.
And the adhesion coefficient utilization rate calculation module is used for receiving the optimal braking time fed back by the braking time analysis module and obtaining the adhesion coefficient utilization rate according to a set calculation rule.
The upper computer control system can respectively obtain the front axle optimal braking time, the front axle attachment coefficient, the rear axle optimal braking time, the rear axle attachment coefficient and the whole vehicle attachment coefficient, and then combine the maximum braking intensity z AL And finally calculating the utilization rate Epsilon (Epsilon) of the adhesion coefficient.
Example 3
Embodiment 3 of the present invention further provides an electronic device, including a processor and a memory, on the basis of embodiment 1; the memory stores at least one instruction or code set of at least one section of program; the code set of at least one instruction or at least one program is loaded into and executed by the processor for use in the test method described in embodiment 1.
In an alternative embodiment, the device further comprises a display and an input device, wherein the display is used for displaying the process parameters related to the testing method and the testing result, and the input device is a touch input device or a key input device.
The electronic device in this embodiment may establish communication with the vehicle under test through the UDS communication protocol, and the tester may perform the test of the utilization rate of the attachment coefficient through the electronic device in this embodiment.
Example 4
Embodiment 4 of the present invention provides a storage medium including instructions that, when executed on an electronic device, cause the electronic device to perform a method of testing an adhesion coefficient utilization rate as described in embodiment 1.
Since the instructions can be used to calculate the utilization of the attachment coefficient, the storage medium can be used to calculate the utilization of the attachment coefficient when running on the electronic device.
The foregoing description of the preferred embodiment of the present invention is not intended to be limiting, and it will be apparent to those skilled in the art that the present invention is not limited to the details of the foregoing exemplary embodiment, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (9)
1. The test method is characterized in that the test method is based on a vehicle control system of a decoupling braking system, and the decoupling braking system performs active linear pressurization through a booster cylinder to realize independent control of four wheels; the method comprises the following steps:
s1, establishing communication with a tested vehicle control system;
s2, selecting a single wheel axle of the tested vehicle as a single-axle braking wheel axle, generating a single-axle braking control command, and simultaneously setting a plurality of slip rates to be tested to generate a plurality of target slip rates corresponding to the single-axle braking control command;
s3, when the vehicle speed is increased to a preset value, sequentially sending a single-axle braking control command and a target slip rate to the vehicle control system, and respectively obtaining a plurality of braking times of the tested vehicle fed back by the vehicle control system, wherein the braking times are respectively braked based on the single-axle braking control command and the target slip rates;
s4, based on the plurality of braking times, acquiring the minimum value of the braking times as the optimal braking time;
s5, returning to S2, and switching other wheel axles of the tested vehicle one by one to serve as single-axle braking wheel axles until the optimal braking time of each wheel axle serving as the single-axle braking wheel axle is obtained;
s6, obtaining the utilization rate of the adhesion coefficient based on the obtained optimal braking time of the independent braking of each wheel axle.
2. The method for testing the utilization rate of an adhesion coefficient according to claim 1, wherein the specific process of obtaining the plurality of braking times in step S3 is as follows:
based on detection of a wheel speed of a braking process by a vehicle control system, acquiring a slip rate of the braking process in real time, and controlling wheel cylinder pressure of a braking wheel shaft through deviation of the slip rate of the braking process and the target slip rate so as to keep the wheel shaft to brake respectively according to the target slip rates; the method comprises the steps of,
based on detection and record of the vehicle speed in the braking process by the vehicle control system, the braking time of the detected vehicle from the first preset vehicle speed to the second preset vehicle speed is respectively obtained.
3. The method according to claim 2, wherein the wheel cylinder pressure of the brake wheel shaft is controlled by the deviation of the brake process slip rate from the target slip rate, specifically:
when the slip rate in the braking process is higher than the preset upper limit of the target slip rate, controlling a pressure reducing unit to regulate and control the pressure of a wheel cylinder of a target braking wheel shaft through the vehicle control system;
when the slip rate in the braking process is higher than the preset lower limit of the target slip rate, the vehicle control system controls the pressurizing unit to regulate and control the pressure of the wheel cylinder of the target braking wheel shaft.
4. The method for testing the utilization rate of adhesion coefficient according to claim 1, wherein the specific manner of setting the plurality of slip rates to be tested in step S2 is as follows: and gradually increasing the sliding rate according to a set gradient until the sliding rate test interval is traversed by taking the minimum value of the sliding rate as an initial value in the test interval.
5. The test system is characterized by being based on a vehicle control system of a decoupling braking system, wherein the decoupling braking system performs active linear pressurization through a booster cylinder to realize independent control of four wheels; comprising the following steps:
the communication module is used for establishing an instruction transmission and information interaction communication path with the vehicle control system;
the wheel axle switching module is used for selecting single wheel axles from the wheel axles of the tested vehicle one by one as single-axle braking wheel axles and correspondingly generating a plurality of target slip rates;
the single-axle braking control module is used for sending a single-axle braking control instruction to the vehicle control system so as to enable the vehicle control system to perform single-axle braking according to a set wheel axle;
the slip rate control module is used for gradually issuing a target slip rate to the vehicle control system so as to gradually brake the single-shaft brake wheel shaft according to the set slip rate;
the braking time analysis module is used for receiving the braking time recorded and fed back by the vehicle control system and acquiring the optimal braking time of each wheel axle based on the braking time;
and the adhesion coefficient utilization rate calculation module is used for receiving the optimal braking time fed back by the braking time analysis module and obtaining the adhesion coefficient utilization rate according to a set calculation rule.
6. The system of claim 5, further comprising a display control module for displaying the control interface and process parameters and test results during the test.
7. An electronic device comprising a processor and a memory;
the memory stores at least one instruction or code set of at least one section of program;
the code set of at least one instruction or at least one program loaded and executed by the processor for implementing a method of testing the utilization of an attachment factor according to any of claims 1-4.
8. The electronic device of claim 7, further comprising a display for displaying process parameters and test results related to the test method and an input device that is a touch input device or a key input device.
9. A computer storage medium comprising instructions which, when run on an electronic device, cause the electronic device to perform a method of testing the utilization of an attachment factor as claimed in any of claims 1-4.
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| CN101414188B (en) * | 2008-12-03 | 2011-06-29 | 重庆邮电大学 | Automobile ABS ECU on-line calibration system and method based on CCP protocol |
| CN104880321B (en) * | 2015-05-18 | 2018-02-06 | 京西重工（上海）有限公司 | For testing the environment simulator of anti-lock braking system |
| DE102016015268B4 (en) * | 2016-12-21 | 2019-06-06 | Compagnie Générale Des Etablissements Michelin | Method for controlling a vehicle brake system for optimizing the braking process |
| CN107239069A (en) * | 2017-06-12 | 2017-10-10 | 奇瑞汽车股份有限公司 | A kind of intelligent vehicle line control brake system, brake apparatus and testboard |
| CN112519737B (en) * | 2019-09-19 | 2021-11-02 | 广州汽车集团股份有限公司 | Control method and device for electric braking strength of vehicle, vehicle and storage medium |
| CN110836781A (en) * | 2019-11-26 | 2020-02-25 | 中汽研汽车检验中心(武汉)有限公司 | Trailer EBS braking response time simulation device and control method thereof |
| CN111959469B (en) * | 2020-08-21 | 2022-08-09 | 上海拿森汽车电子有限公司 | Wheel anti-lock control method and device and vehicle |
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