CN115101037A - Active noise reduction system and automobile - Google Patents
Active noise reduction system and automobile Download PDFInfo
- Publication number
- CN115101037A CN115101037A CN202210682328.0A CN202210682328A CN115101037A CN 115101037 A CN115101037 A CN 115101037A CN 202210682328 A CN202210682328 A CN 202210682328A CN 115101037 A CN115101037 A CN 115101037A
- Authority
- CN
- China
- Prior art keywords
- omega
- noise
- vehicle
- road
- reduction system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17879—General system configurations using both a reference signal and an error signal
- G10K11/17883—General system configurations using both a reference signal and an error signal the reference signal being derived from a machine operating condition, e.g. engine RPM or vehicle speed
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17813—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/128—Vehicles
- G10K2210/1282—Automobiles
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3055—Transfer function of the acoustic system
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention relates to the technical field of automobiles, and provides an active noise reduction system and an automobile, wherein the active noise reduction system comprises: the automatic driving road sensing system is used for acquiring road information in real time; the power domain is used for acquiring vehicle power information in real time; a processor configured to: the road surface information and the vehicle power information are used for obtaining a virtual road spectrum G (omega) through time-frequency transformation; the noise Q (omega) generated at the human ear by the road excitation is obtained according to the virtual road spectrum G (omega) and a transfer function H (omega) preset in the processor; wherein the transfer function H (omega) represents a noise response function of the automobile from four wheels to human ears in the automobile; and the noise elimination control module is used for generating a noise elimination signal, controlling an in-vehicle sound system to play the noise elimination signal D (omega), and controlling the in-vehicle sound system to play the noise elimination signal D (omega), so that the in-vehicle noise E (omega) obtained by offsetting the noise elimination signal D (omega) and the noise Q (omega) is in a set target range.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an active noise reduction system and an automobile.
Background
Along with the improvement of people's self health consciousness, also not only be as a vehicle to the requirement of car, people also constantly improve to the requirement of car internal environment health travelling comfort. As an environmental pollution, the noise in the vehicle is an important factor affecting human health and driving safety, and how to effectively reduce and reduce the noise in the vehicle is a continuous pursuit target of automobile manufacturers and consumers.
Road vibration noise is caused by the excitation of tires by rough road surfaces during the running of vehicles. In the prior art, an active noise reduction system needs to arrange a plurality of accelerometers on a chassis to extract a vibration reference signal and reduce road vibration noise according to the vibration reference signal, so that the cost is high, and the response result of some sudden road input systems is easy to disperse.
Disclosure of Invention
The invention provides an active noise reduction system and an automobile, which are used for effectively reducing the noise of the environment in the automobile and providing a more comfortable driving environment for users by combining the latest noise reduction technology aiming at a pollution source of road vibration noise.
According to a first aspect of the present invention, there is provided an active noise reduction system comprising:
the automatic driving road sensing system is used for acquiring road information in real time, and the road information represents the road information in front of the vehicle;
the power domain is used for acquiring vehicle power information in real time, and the vehicle power information represents the speed and the power output torque of the vehicle during driving;
a processor configured to:
the road surface information and the vehicle power information are used for obtaining a virtual road spectrum G (omega) through time-frequency transformation;
the noise Q (omega) generated at the human ear by the road excitation is obtained according to the virtual road spectrum G (omega) and a transfer function H (omega) preset in the processor; wherein the transfer function H (ω) characterizes a four-wheel noise response function of the vehicle to the human ear in the vehicle; and
the device is used for generating a noise-canceling signal D (omega) and controlling an in-vehicle sound system to play the noise-canceling signal D (omega) so that an in-vehicle noise E (omega) obtained after the noise-canceling signal D (omega) and the noise Q (omega) are cancelled is within a set target range, the in-vehicle noise E (omega) is a microphone noise monitoring value at the ear of a person in the vehicle, and the target range is a range in which the human ear senses well.
Optionally, the processor is further configured to:
and the controller is used for carrying out closed-loop control on the noise-canceling signal D (omega) according to the monitored sound field in the vehicle, so that the noise E (omega) in the vehicle after the noise-canceling signal D (omega) and the noise Q (omega) are offset is in a set target range.
Optionally, the calculation formula of the noise Q (ω) is:
Q(ω)＝H(ω)*G(ω)*H(ω)H，
where H (ω) H is the conjugate transpose of the transfer function H (ω) matrix.
Optionally, the calculation formula of the transfer function H (ω) is:
H(ω)＝P(ω)/G(ω)
wherein P (omega) is the virtual road spectrum G (omega) four-wheel excitation-to-in-vehicle sound frequency domain response.
Optionally, the P (ω) is obtained by testing an in-vehicle sound signal through an in-vehicle microphone.
Optionally, the performing closed-loop control on the noise cancellation signal specifically includes:
and carrying out self-adaptive processing on the frequency, amplitude and phase of the sound denoising signal D (omega) so that the noise E (omega) in the vehicle after denoising is in a target range.
Optionally, the time-frequency transform is a fast fourier transform.
Optionally, the noise cancellation signal D (ω) and the noise Q (ω) are opposite in phase and equal in amplitude and frequency.
Optionally, the processor is further configured to:
the active noise reduction system is used for monitoring the opening and closing state of the door and window system of the automobile body area so as to control the opening and closing of the active noise reduction system.
According to a second aspect of the invention, there is provided an automobile comprising an active noise reduction system according to the first aspect of the invention.
In the active noise reduction system and the automobile provided by the invention, a processor processes road information acquired by an automatic driving road sensing system and vehicle power information acquired by a vehicle power domain to obtain a virtual road spectrum G (omega) representing vehicle four-wheel road vibration excitation; the processor is used for obtaining noise Q (omega) generated by road excitation at the ears of a person according to the virtual road spectrum G (omega) and a transfer function H (omega) which is preset in the processor and is used for representing noise from four wheels of an automobile to the ears of the person in the automobile, generating a noise elimination signal D (omega) which is offset from the noise Q (omega), and controlling an in-automobile sound system to play according to the noise elimination signal, so that the effect of reducing road vibration noise caused by the fact that tires are excited by rugged road in the driving process of the automobile is finally achieved, and a more comfortable driving environment is provided for users.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an active noise reduction system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of the closed-loop control of the noise cancellation signal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, 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.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Referring to fig. 1, an embodiment of the present invention provides an active noise reduction system, including:
the system 101 for sensing the driving surface of the vehicle comprises an automatic driving surface sensing system 101, wherein the automatic driving surface sensing system 101 is used for acquiring the road surface information in real time, and the road surface information represents the road surface information in front of the vehicle.
The automatic driving perception system 101 in the embodiment of the invention is a system which takes data of various sensors and information of a high-precision map as input and accurately perceives the surrounding environment of an automatic driving vehicle through a series of calculations and processing.
And the power domain 102 is used for acquiring vehicle power information in real time, and the vehicle power information represents the speed and the power output torque of the vehicle during driving.
The power domain 102 referred to in the embodiments of the present invention may calculate and distribute torque for various power system units (e.g., internal combustion engine, generator, battery, transmission, etc.) in the vehicle and derive real-time speed of the vehicle while driving.
A processor 100, the processor 100 configured to: the road surface information acquisition unit is used for acquiring a virtual road spectrum G (omega) through time-frequency transformation according to the road surface information and the vehicle power information; wherein the time-frequency transform is a fast Fourier transform.
In a specific embodiment, the automatic driving road sensing system 101 scans road information in front of the vehicle in real time to obtain real-time road information, such as the height amplitude f (x) of the road surface, roughness and other spatial domains relative to the road length, and uses the information as the input excitation of the active noise reduction system; the power domain 102 calculates and distributes torque for various power system units in the vehicle to obtain vehicle power information during vehicle driving, for example, the instantaneous vehicle speed calculated according to the power domain is v, the processor 100 combines road surface information and vehicle power information, and the specific combination is that the spatial domain amplitude f (x) obtained by the road surface information is divided by the instantaneous vehicle speed v obtained by the vehicle power information, and a virtual road spectrum G (omega) is obtained through fast fourier transform, and the virtual road spectrum G (omega) combines the road surface information and the vehicle power information, so that road surface vibration excitation of four wheels of the vehicle passing through a certain road surface at a certain speed can be accurately expressed.
The processor 100 mentioned in the real-time example of the present invention is further configured to obtain noise Q (ω) generated by road excitation at human ears according to the virtual road spectrum G (ω) and a transfer function H (ω) preset in the processor; wherein the transfer function H (ω) characterizes a four-wheel noise function of the vehicle to the human ear in the vehicle.
Wherein the transfer function H (ω) is calculated by the formula:
H(ω)＝P(ω)/G(ω)
p (omega) is obtained by testing the sound signal of human ears in the car under the excitation of the virtual road spectrum G (omega) through a microphone in the car.
The calculation formula of the noise Q (omega) is as follows:
Q(ω)＝H(ω)*G(ω)*H(ω) H ，
wherein, H (omega) H The method is the conjugate transpose of the matrix of the transfer function H (omega), namely, the conjugate is taken firstly and then the transpose is taken. The matrix with complex numbers as elements, and the conjugate matrix refers to a matrix obtained by conjugating each element.
The processor 100 mentioned in the embodiment of the present invention is further configured to perform closed-loop control on the noise-canceling signal D (ω) according to the monitored in-vehicle sound field, so that the in-vehicle noise E (ω) after the noise-canceling signal D (ω) and the noise Q (ω) are cancelled is within a set target range; the target range is a range with good human ear sensation, and the in-vehicle noise E (omega) is a microphone noise monitoring value at the ear of a human in the vehicle.
Referring to fig. 2, the performing closed-loop control on the noise cancellation signal specifically includes:
s1: the processor generates a noise elimination signal D (omega) with the same frequency and amplitude as the noise Q (omega) and opposite phase (different by 180 degrees), and controls the sound system in the vehicle to play;
s2: and monitoring the noise E (omega) in the vehicle after the noise elimination through a microphone in the vehicle, and adjusting a noise elimination signal D (omega).
Specifically, the processor monitors the square of the amplitude E2(ω) of each frequency point of the in-vehicle noise E (ω), and if Ei2(ω) exceeds the target value range, the processor adjusts the post-processor to continue to the step S1 by increasing the amplitude of the frequency point of the noise canceling signal Di (ω).
The processor 100 mentioned in the real-time example of the present invention generates the noise cancellation signal D (ω) that cancels the noise Q (ω) according to the noise Q (ω) adjusted accordingly, that is, the noise cancellation signal and the noise Q (ω) have opposite phases and equal amplitudes and frequencies, and the processor 100 controls the in-vehicle acoustic system 103 to play according to the noise cancellation signal, so as to achieve the effect of reducing the road vibration noise generated by the tire excited by the rugged road surface during the running of the vehicle.
The processor 100 mentioned in the embodiment of the present invention is further configured to monitor an open/close state of the body area door and window system 104 to control the active noise reduction system to open and close, specifically, if the processor 100 monitors the open state of the body area door and window system 104, the processor 100 does not generate the noise cancellation signal D (ω) to control the active noise reduction system to close.
In the active noise reduction system and the automobile provided by the invention, a processor processes road information acquired by an automatic driving road sensing system and vehicle power information acquired by a vehicle power domain to obtain a virtual road spectrum G (omega) representing vehicle four-wheel road vibration excitation; the processor is used for obtaining noise Q (omega) generated at the ear by road excitation according to the virtual road spectrum G (omega) and a transfer function H (omega) of a noise function which is preset in the processor and is used for representing the four wheels of the automobile to the ear in the automobile, generating a noise elimination signal D (omega) which is offset with the noise Q (omega), and controlling the noise elimination signal to be played through an in-automobile sound system according to the noise elimination signal, so that the effect of reducing the road vibration noise generated by the excitation of the tire on the rugged road in the driving process of the automobile is finally achieved, and a more comfortable driving environment is provided for a user.
The embodiment of the invention provides an automobile which comprises the active noise reduction system.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An active noise reduction system, comprising:
the automatic driving road sensing system is used for acquiring road information in real time, and the road information represents the road information in front of the vehicle;
the power domain is used for acquiring vehicle power information in real time, and the vehicle power information represents the speed and the power output torque of the vehicle during driving;
a processor configured to:
the road surface information acquisition unit is used for acquiring road surface information of the vehicle and vehicle power information of the vehicle according to the road surface information and the vehicle power information;
the noise Q (omega) generated at the human ear by the road excitation is obtained according to the virtual road spectrum G (omega) and a transfer function H (omega) preset in the processor; wherein the transfer function H (ω) characterizes a four-wheel noise response function of the vehicle to the human ear in the vehicle; and
the device is used for generating a noise elimination signal D (omega) and controlling an in-vehicle sound system to play the noise elimination signal D (omega), so that the in-vehicle noise E (omega) after the noise elimination signal D (omega) and the noise Q (omega) are counteracted is in a set target range, and the in-vehicle noise E (omega) is a microphone noise monitoring value at the position of human ears in the vehicle.
2. The active noise reduction system of claim 1, wherein the processor is further configured to:
and the controller is used for carrying out closed-loop control on the noise-canceling signal D (omega) according to the monitored sound field in the vehicle, so that the noise E (omega) in the vehicle after the noise-canceling signal D (omega) and the noise Q (omega) are offset is in a set target range.
3. The active noise reduction system of claim 2, wherein the noise Q (ω) is calculated by the formula:
Q(ω)＝H(ω)*G(ω)*H(ω)H，
where H (ω) H is the conjugate transpose of the transfer function H (ω) matrix.
4. Active noise reduction system according to claim 3, characterized in that the transfer function H (ω) is calculated by:
H(ω)＝P(ω)/G(ω)
wherein P (omega) is the virtual road spectrum G (omega) four-wheel excitation-to-in-vehicle sound frequency domain response.
5. The active noise reduction system of claim 4, wherein the P (ω) is obtained by testing an in-vehicle sound signal with an in-vehicle microphone.
6. The active noise reduction system according to claims 2-5, wherein the closed-loop controlling the noise cancellation signal specifically comprises:
and performing adaptive processing on the frequency, amplitude and phase of the sound denoising signal D (omega) so that the denoised E (omega) is in a set target range.
7. The active noise reduction system of claim 1, wherein the time-frequency transform is a fast fourier transform.
8. The active noise reduction system of claim 1, wherein the noise cancellation signal D (ω) is in opposite phase and equal frequency and amplitude to the noise Q (ω).
9. The active noise reduction system of claim 1, wherein the processor is further configured to:
the active noise reduction system is used for monitoring the opening and closing state of the door and window system of the automobile body area so as to control the opening and closing of the active noise reduction system.
10. An automobile, characterized in that it comprises an active noise reduction system according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210682328.0A CN115101037A (en) | 2022-06-16 | 2022-06-16 | Active noise reduction system and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210682328.0A CN115101037A (en) | 2022-06-16 | 2022-06-16 | Active noise reduction system and automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115101037A true CN115101037A (en) | 2022-09-23 |
Family
ID=83291647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210682328.0A Pending CN115101037A (en) | 2022-06-16 | 2022-06-16 | Active noise reduction system and automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115101037A (en) |
-
2022
- 2022-06-16 CN CN202210682328.0A patent/CN115101037A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Samarasinghe et al. | Recent advances in active noise control inside automobile cabins: Toward quieter cars | |
| EP3244400B1 (en) | Method and system for selecting sensor locations on a vehicle for active road noise control | |
| US9240176B2 (en) | Active noise control system and method | |
| CN108470562A (en) | The active noise controlling adjusted using variable step size | |
| CN108140376A (en) | Engine order and road noise control | |
| CN111916044A (en) | Dynamic in-vehicle noise cancellation divergence control | |
| Wang et al. | An improved LMS algorithm for active sound-quality control of vehicle interior noise based on auditory masking effect | |
| KR102408323B1 (en) | Virtual location noise signal estimation for engine order cancellation | |
| CN111862927B (en) | In-vehicle road noise control method for primary channel feedforward-feedback hybrid online modeling | |
| CN115171639A (en) | Vehicle noise reduction method and system | |
| Zafeiropoulos et al. | Active control of structure-borne road noise based on the separation of front and rear structural road noise related dynamics | |
| Kim et al. | Comprehensive active control of booming noise inside a vehicle caused by the engine and the driveline | |
| CN112151001B (en) | PHEV active noise reduction method and system thereof | |
| EP4148725A1 (en) | Adaptive active noise cancellation based on head movement | |
| JP2021510848A (en) | Active noise control methods and systems involving variable actuators and sensors | |
| Wang et al. | Hybrid vibro-acoustic active control method for vehicle interior sound quality under high-speed | |
| CN115101037A (en) | Active noise reduction system and automobile | |
| CN112328949B (en) | Reference signal generation method and device for active noise reduction system of automobile engine | |
| JPH07248781A (en) | Method for setting characteristic of vibration reduction device | |
| CN116052630A (en) | Active control system and method for automobile road noise | |
| CN112951195A (en) | Vehicle-mounted active noise reduction dynamic regulation and control method and system | |
| Zafeiropoulos et al. | Active control of structure-borne road noise: A control strategy based on the most significant inputs of the vehicle | |
| CN114255727A (en) | Active noise reduction method, vehicle-mounted active noise reduction system and automobile | |
| CN112334971A (en) | Concurrent FXLMS system using common reference signal and error signal | |
| JP2876896B2 (en) | Active noise control system for vehicles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |