Active noise reduction system for power-assisted steering motor and control method thereof

Abstract

The invention relates to an active noise reduction system for a power-assisted steering motor and a control method of the active noise reduction system. The system comprises a power-assisted steering motor; the signal collection module is used for acquiring vehicle information; a microphone that collects noise; a speaker that outputs a sound for suppressing noise; a storage device that stores vehicle information and noise corresponding to the vehicle information in advance; when the first controller receives the real-time vehicle information from the signal collection module, the real-time vehicle information is matched with the vehicle information pre-stored in the storage device so as to determine the noise generated by the steering power-assisted motor corresponding to the real-time vehicle information during operation; therefore, the loudspeaker outputs sound with the phase opposite to that of noise generated during operation of the power-assisted steering motor. According to the invention, the noise of the power-assisted steering motor can be effectively suppressed under the condition that the structure of the power-assisted steering motor is not changed.

Description

Technical Field

[0001] The invention relates to an active noise reduction system for a power steering motor and a control method thereof, which can generate sound for suppressing noise generated by the power steering motor during operation according to vehicle information. Background Art

[0002] The vehicle's electric power steering system (EPS) is equipped with a power steering motor to assist the vehicle's steering. During the operation of the power steering motor, when the power steering motor rotates rapidly, a "buzzing" noise is generated. A noise reduction system has been developed to suppress the noise generated when the power steering motor rotates rapidly.

[0003] One type of noise reduction system generates a sound with the same amplitude and frequency as the generated noise but with an opposite phase by setting a noise suppression winding in the power steering motor to offset the noise generated by the power steering motor. This noise reduction system requires additional noise suppression windings to be added to the stator core slots of the power steering motor, which changes the structure of the power steering motor and is not suitable for existing electric power steering systems. In addition, since the power steering motor operates in a noisy environment, the noise components are complex and the noise cannot be completely suppressed by the noise suppression winding.

[0004] Another type of noise reduction system generates a sound with the same amplitude and frequency as the noise generated, but with an opposite phase, based on the relationship between the inverter parameters, motor parameters, and noise generated, to offset the noise generated by the power steering motor. This noise reduction system mainly considers the influence of the inverter on the noise of the power steering motor. However, due to the influence of the processing and assembly of the power steering motor, the noise generated by the same inverter parameters and motor parameters is quite different, and it is impossible to accurately establish the relationship between the inverter parameters and motor parameters and the noise generated. Therefore, the noise reduction effect of this noise reduction system is limited.

[0005] Therefore, it is necessary to provide an active noise reduction system that does not require modification of the structure of the power steering motor and can generate a sound that can effectively suppress noise.

[0006] The information disclosed in this Background of the Invention section is only intended to enhance understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0007] An object of the present invention is to provide an active noise reduction system for a power steering motor, which can effectively suppress the noise of the power steering motor without changing the structure of the power steering motor.

[0008] To achieve the above-mentioned object, on the one hand, the present invention provides an active noise reduction system for a power steering motor, which system may include: a power steering motor, a signal collection module, a microphone, a speaker, a storage device and a first controller, wherein the power steering motor may be arranged in a steering device of a vehicle to assist the steering of the vehicle; the signal collection module may obtain vehicle information for controlling the power steering motor; the microphone may be used to collect noise generated when the power steering motor is running; the speaker may output a sound for suppressing the noise generated when the power steering motor is running; the storage device may be used to pre-store vehicle information and noise generated when the power steering motor is running corresponding to the vehicle information; the first controller may be electrically connected to the power steering motor, the signal collection module, the microphone and the storage device to receive vehicle information from the signal collection module, and output a motor control signal for controlling the operation of the power steering motor to the power steering motor according to the received vehicle information, thereby controlling the operation of the power steering motor; when the power steering motor is running, the noise generated by the power steering motor is received from the microphone, the vehicle information and the noise generated when the power steering motor is running corresponding to the vehicle information are matched, and the matched vehicle information and the noise generated when the power steering motor is running corresponding to the vehicle information are sent to the storage device for pre-storage. When the first controller receives real-time vehicle information from the signal collection module, the first controller can match the real-time vehicle information with the vehicle information pre-stored in the storage device to determine the noise generated when the power steering motor corresponding to the real-time vehicle information is running, so that the speaker outputs a sound with an opposite phase to the noise generated when the power steering motor is running.

[0009] In an exemplary embodiment of the present invention, the signal collection module may include: a vehicle speed sensor and a torque angle sensor, wherein the vehicle speed sensor may be used to obtain the vehicle speed; the torque angle sensor may be provided at a steering device of the vehicle to obtain the torque of the steering wheel and the rotation speed of the steering wheel. The vehicle information may include the vehicle speed, the torque of the steering wheel and the rotation speed of the steering wheel.

[0010] In an exemplary embodiment of the present invention, the signal collection module may include: a vehicle speed sensor and a torque angle sensor, wherein the vehicle speed sensor may be used to obtain the vehicle speed; the torque angle sensor may be provided at the steering device of the vehicle to obtain the steering direction of the steering wheel, the torque of the steering wheel, and the rotation speed of the steering wheel. The vehicle information may include: the vehicle speed, the steering direction of the steering wheel, the torque of the steering wheel, and the rotation speed of the steering wheel.

[0011] In an exemplary embodiment of the present invention, the first controller may perform Fourier transform on the noise generated by the power steering motor when it is running, which is received from the microphone, to obtain the spectrum information of the noise. The storage device may pre-store the vehicle information and the spectrum information of the noise generated by the power steering motor when it is running, which corresponds to the vehicle information.

[0012] In an exemplary embodiment of the present invention, the active noise reduction system for the power steering motor may further include: a second controller electrically connected to the first controller and the speaker to receive spectrum information of the noise generated when the power steering motor is running corresponding to real-time vehicle information from the first controller, generate a spectrum with an opposite phase to the noise generated when the power steering motor is running corresponding to the real-time vehicle information, and output a speaker control signal to the speaker for controlling the speaker to output the spectrum.

[0013] In an exemplary embodiment of the present invention, the microphone and the speaker may be disposed near the power steering motor or near the driver.

[0014] On the other hand, the present invention provides a control method for an active noise reduction system for a power steering motor, which may include: receiving vehicle information from a signal collection module through a first controller, and outputting a motor control signal for controlling the operation of the power steering motor to the power steering motor according to the received vehicle information, thereby controlling the operation of the power steering motor; when the power steering motor is running, receiving noise generated by the power steering motor from a microphone through the first controller, matching the vehicle information with the noise generated when the power steering motor is running corresponding to the vehicle information, and sending the matched vehicle information and the noise generated when the power steering motor is running corresponding to the vehicle information to a storage device for pre-storage; wherein, when real-time vehicle information is received from the signal collection module, matching the real-time vehicle information with the vehicle information pre-stored in the storage device through the first controller to determine the noise generated when the power steering motor is running corresponding to the real-time vehicle information, so that the speaker outputs a sound having an opposite phase to the noise generated when the power steering motor is running.

[0015] In an exemplary embodiment of the present invention, the vehicle information may include at least one of a vehicle speed, a turning direction of a steering wheel, a torque of the steering wheel, and a rotation speed of the steering wheel.

[0016] In an exemplary embodiment of the present invention, the control method may further include: performing Fourier transform on the noise generated by the power steering motor when it is running and received from the microphone by a first controller to obtain frequency spectrum information of the noise; and pre-storing vehicle information and frequency spectrum information of the noise generated by the power steering motor when it is running and corresponding to the vehicle information by a storage device.

[0017] In an exemplary embodiment of the present invention, the control method may further include: receiving, through a second controller, frequency spectrum information of the noise generated when the power steering motor corresponding to the real-time vehicle information is running from the first controller, generating a frequency spectrum having an opposite phase to the noise generated when the power steering motor corresponding to the real-time vehicle information is running, and outputting a speaker control signal to the speaker for controlling the speaker to output the said frequency spectrum.

[0018] The active noise reduction system for a power steering motor and the control method thereof according to the exemplary embodiment of the present invention have the following beneficial effects:

[0019] The active noise reduction system for a power steering motor according to an exemplary embodiment of the present invention can realize an active noise reduction system with a simple structure and low cost without changing the structure of the power steering motor or even adding additional vehicle components.

[0020] The active noise reduction system for a power steering motor according to an exemplary embodiment of the present invention can establish a relationship between vehicle information and noise of the power steering motor according to vehicle information including vehicle speed, torque and rotation speed of a steering wheel, thereby generating a sound capable of effectively suppressing noise.

[0021] According to an exemplary embodiment of the present invention, an active noise reduction system for a power steering motor can collect noise generated when the power steering motor is running under different vehicle information in advance through a microphone, and suppress the noise generated by the power steering motor by matching real-time vehicle information with pre-stored vehicle information.

[0022] According to the active noise reduction system for a power steering motor according to an exemplary embodiment of the present invention, when the power steering motor generates noise, the spectrum information of the noise can be obtained by only matching the real-time vehicle information with the pre-stored vehicle information, without the need to collect and analyze the noise in real time, thereby improving the working efficiency of the active noise reduction system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and other advantages of the present invention will be more clearly understood through the following detailed description presented in conjunction with the accompanying drawings, in which:

[0024] Figure 1 A control block diagram showing an active noise reduction system for a power steering motor according to an exemplary embodiment of the present invention;

[0025] Figure 2 A control flowchart showing an active noise reduction system for a power steering motor according to an exemplary embodiment of the present invention.

[0026] It should be understood that the drawings are not drawn to scale, but show various features that illustrate the basic principles of the invention in a slightly simplified manner. In the drawings of the present invention, the same reference numerals represent the same or equivalent parts of the present invention. DETAILED DESCRIPTION

[0027] Reference will be made in detail to various embodiments of the present invention, examples of which are shown in the accompanying drawings and are described below. Although the present invention will be described in conjunction with exemplary embodiments of the present invention, it will be understood that this specification is not intended to limit the present invention to those exemplary embodiments. On the contrary, the present invention is intended to cover not only the exemplary embodiments of the present invention, but also various alternatives, modifications, equivalents and other embodiments included within the spirit and scope of the present invention as defined in the appended claims.

[0028] Hereinafter, various exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0029] Figure 1 A control block diagram showing an active noise reduction system for a power steering motor according to an exemplary embodiment of the present invention.

[0030] like Figure 1 As shown, the active noise reduction system for a power steering motor may include: a power steering motor 10 , a signal collection module 20 , a microphone 30 , a speaker 40 , a storage device 50 and a first controller 60 .

[0031] The power steering motor 10 may be a motor for an electric power steering system of a vehicle, and is used to assist the driver in completing the steering operation of the vehicle. Since the power steering motor 10 is disposed in a steering device close to the driver, the noise generated when the power steering motor 10 is running may affect the driver.

[0032] The signal collection module 20 may include various sensors provided in the vehicle to obtain vehicle information for controlling the power steering motor 10. Preferably, the signal collection module 20 may include a vehicle speed sensor 21 and a torque angle sensor (TAS) 22. The vehicle speed sensor 21 may sense the vehicle speed, and the torque angle sensor 22 may be provided in the steering device of the vehicle to sense the torque of the steering wheel and the rotation speed of the steering wheel. The vehicle information may include the vehicle speed, the torque of the steering wheel, and the rotation speed of the steering wheel.

[0033] The power steering motor 10 can operate according to the vehicle speed, steering wheel torque and rotation speed acquired by the signal collection module 20. Different vehicle speeds, steering wheel torque and rotation speeds mean that the rotation speed of the power steering motor 10 is different, and the noise generated is also different, so the sound used to suppress the noise is also different. Therefore, the sound used to suppress the noise can be generated according to the vehicle speed, steering wheel torque and rotation speed.

[0034] In order to collect the noise generated by the power steering motor 10 during operation, a microphone 30 may be provided near the power steering motor 10. The microphone 30 may collect different noises generated by the power steering motor 10 at different vehicle speeds, steering wheel torques and rotation speeds in advance.

[0035] In order to output a sound for suppressing noise generated when the power steering motor 10 is operated, a speaker 40 may be provided near the power steering motor 10 .

[0036] In another exemplary embodiment, a Bluetooth speaker may be used instead of a wired speaker to increase the freedom of installation space.

[0037] The microphone 30 and the speaker 40 may be disposed near the power steering motor (e.g., the housing of the power steering motor), but the present invention is not limited thereto, and the microphone 30 and the speaker 40 may also be disposed near the driver. Alternatively, the microphone 30 may be disposed near the power steering motor, and the speaker 40 may be disposed near the driver. Alternatively, the microphone and the speaker already in the vehicle may be used without adding additional components.

[0038] The first controller 60 may be an electronic control unit (ECU) of the vehicle. The first controller 60 may be electrically connected to the signal collection module 20 to receive vehicle information for controlling the power steering motor from the signal collection module. Specifically, the first controller 60 may generate a motor control signal for controlling the power steering motor according to the vehicle speed, the torque of the steering wheel, and the rotation speed of the steering wheel, and send the generated motor control signal to the power steering motor, thereby controlling the operation of the power steering motor.

[0039] The first controller 60 can be electrically connected to the microphone 30 to receive the noise generated when the power steering motor is running from the microphone. The first controller 60 can perform signal processing on the received noise generated when the power steering motor is running. Preferably, the first controller 60 can perform Fourier transform on the noise to obtain the spectrum information of the noise.

[0040] For different steering wheel torques and rotation speeds, the noise generated by the power steering motor when it is running is also different. The first controller 60 can match the vehicle information received from the signal collection module with the noise generated by the power steering motor when it is running corresponding to the vehicle information received from the microphone one by one to generate a mapping relationship between the vehicle information and the spectrum information of the noise. Further, the first controller 60 can send the generated mapping relationship including the vehicle information and the spectrum information of the noise to the storage device 50 for pre-storage.

[0041] The storage device 50 may pre-store a large amount of vehicle information and spectrum information of noise having a mapping relationship with the vehicle information. Thus, when the signal collection module again acquires vehicle information consistent with the vehicle information pre-stored in the storage device 50, the first controller 60 may determine the spectrum information of noise corresponding to the vehicle information through the mapping relationship pre-stored in the storage device 50.

[0042] When the vehicle is driving, the first controller 60 can receive real-time vehicle information from the signal collection module, match the real-time vehicle information with the vehicle information pre-stored in the storage device, and determine the frequency spectrum information of the noise generated when the power steering motor is running corresponding to the real-time vehicle information. Thus, in response to the determined frequency spectrum information of the noise, the speaker can output a sound with an opposite phase to the determined noise generated when the power steering motor is running.

[0043] In this way, when the power steering motor generates noise, the spectrum information of the noise can be obtained by simply matching the real-time vehicle information with the pre-stored vehicle information, without the need to collect and analyze the noise in real time, thereby improving the working efficiency of the active noise reduction system.

[0044] In another exemplary embodiment, the storage device 50 may also be integrated into the first controller 60. The first controller 60 may include a processor and a memory, and the memory of the first controller 60 may be used as the storage device 50.

[0045] The active noise reduction system for the power steering motor according to the exemplary embodiment may further include: a second controller 70, which may be electrically connected to the first controller 60 to receive the spectrum information of the noise generated when the power steering motor is running corresponding to the real-time vehicle information from the first controller. According to the spectrum information of the noise generated when the power steering motor is running, the second controller 70 may generate a spectrum with the same amplitude and frequency as the noise generated when the power steering motor is running, but with an opposite phase, for suppressing the noise generated when the power steering motor is running. The superposition of two audio signals with the same amplitude and frequency but opposite phases will coherently cancel each other, and noise can be suppressed by using this principle.

[0046] The second controller 70 may generate a speaker control signal for controlling the speaker according to the generated frequency spectrum for suppressing noise, so that the speaker outputs a sound for suppressing noise generated when the power steering motor is operated.

[0047] In another exemplary embodiment, the second controller 70 may also be integrated with the first controller 60 into one controller.

[0048] In addition to the "buzzing" noise generated by the rapid rotation of the power steering motor, the collision of mechanical components in the electric power steering system also generates noise when the steering wheel changes direction. In order to suppress the noise generated when the steering wheel changes direction, the signal collection module 20 can additionally collect information on the steering wheel's direction of rotation.

[0049] In another exemplary embodiment, the torque angle sensor 22 of the signal collection module 20 can further sense the direction of rotation of the steering wheel. At this time, the vehicle information may include the vehicle speed, the direction of rotation of the steering wheel, the torque of the steering wheel, and the rotation speed of the steering wheel. According to the direction of rotation of the steering wheel, the first controller 60 can determine whether the direction of rotation of the steering wheel has changed. In response to determining that the direction of rotation of the steering wheel has changed, the microphone 30 can collect different noises generated by the collision of mechanical parts and the operation of the steering power motor when the direction of rotation of the steering wheel changes. Accordingly, the speaker 40 can output a sound with an opposite phase to the noise generated by the collision of mechanical parts and the operation of the steering power motor.

[0050] The active noise reduction system for a power steering motor according to an exemplary embodiment can pre-collect the noise generated by the power steering motor when it is running through a microphone, match and pre-store the noise and vehicle information, so as to suppress the noise generated by the power steering motor when it is running in real time.

[0051] Figure 2 A control flowchart showing an active noise reduction system for a power steering motor according to an exemplary embodiment of the present invention.

[0052] The active noise reduction system for the power steering motor can collect and store the noise generated when the power steering motor is running under different vehicle information in advance, and when the real-time vehicle information matches the pre-stored vehicle information, output the sound used to suppress the noise generated when the power steering motor is running.

[0053] like Figure 2 As shown, in step S101, the signal collection module can collect vehicle information. The vehicle speed sensor of the signal collection module can collect vehicle speed information, and the torque angle sensor of the signal collection module can collect steering wheel torque and rotation speed information, and send the collected vehicle information to the first controller.

[0054] In step S102, the first controller may generate a motor control signal for controlling the power steering motor according to the received vehicle information, and send the generated motor control signal to the power steering motor. The power steering motor may operate in response to the received motor control signal.

[0055] In step S103 , the microphone may collect noise generated when the power steering motor is running and may send the collected noise to the first controller.

[0056] In step S104, the first controller may perform signal processing on the received noise to obtain frequency spectrum information of the noise.

[0057] In step S105, the first controller may match the vehicle information with the frequency spectrum information of the noise generated when the power steering motor corresponding to the vehicle information is running, and send the matched vehicle information and the frequency spectrum information of the noise corresponding to the vehicle information to the storage device for pre-storage. Steps S101 to S105 may be repeatedly performed multiple times to obtain different noises generated when the power steering motor is running under different vehicle information.

[0058] In step S106, the signal collection module may acquire real-time vehicle information, and send the acquired real-time vehicle information to the first controller.

[0059] Since a large amount of vehicle information and spectrum information of noise having a mapping relationship with the vehicle information are pre-stored in the storage device, in step S107, the first controller may match the received real-time vehicle information with the vehicle information pre-stored in the storage device to determine the pre-stored vehicle information having the highest matching degree with the real-time vehicle information. The first controller may determine the noise corresponding to the pre-stored vehicle information having the highest matching degree as the noise to be suppressed, and send the determined spectrum information of the noise to be suppressed to the second controller.

[0060] In step S108 , based on the received spectrum information of the noise to be suppressed, the second controller may generate a spectrum having the same amplitude and frequency as the noise to be suppressed but an opposite phase, for suppressing the noise.

[0061] In step S109 , the second controller may generate a speaker control signal for controlling the speaker according to the generated frequency spectrum for suppressing noise, and transmit the generated speaker control signal to the speaker.

[0062] In step S110 , the speaker may generate a sound having the same amplitude and frequency as the noise to be suppressed but an opposite phase according to the received speaker control signal and output the sound.

[0063] Through the above process, when the power steering motor generates noise during vehicle driving, a sound for suppressing the noise can be output according to the spectrum information of the noise pre-stored in the storage device, thereby suppressing the noise generated by the power steering motor.

[0064] The active noise reduction system for a power steering motor according to an exemplary embodiment of the present invention can realize an active noise reduction system with a simple structure and low cost without changing the structure of the power steering motor or even adding additional vehicle components.

[0065] The active noise reduction system for a power steering motor according to an exemplary embodiment of the present invention can establish a relationship between vehicle information and noise of the power steering motor according to vehicle information including vehicle speed, torque and rotation speed of a steering wheel, thereby generating a sound capable of effectively suppressing noise.

[0066] According to an exemplary embodiment of the present invention, an active noise reduction system for a power steering motor can collect noise generated when the power steering motor is running under different vehicle information in advance through a microphone, and suppress the noise generated by the power steering motor by matching real-time vehicle information with pre-stored vehicle information.

[0067] According to the active noise reduction system for a power steering motor according to an exemplary embodiment of the present invention, when the power steering motor generates noise, the spectrum information of the noise can be obtained by only matching the real-time vehicle information with the pre-stored vehicle information, without the need to collect and analyze the noise in real time, thereby improving the working efficiency of the active noise reduction system.

[0068] The above descriptions of the specific exemplary embodiments of the present invention are presented for the purpose of illustration and description. They are not intended to be exhaustive or to limit the present invention to the precise form disclosed, and it is obvious that many modifications and changes can be made according to the above teachings. The selection and description of the exemplary embodiments are to explain certain principles of the present invention and their practical applications, so that those skilled in the art can make and use various exemplary embodiments of the present invention and their different alternative forms and modified forms. The scope of the present invention is intended to be limited by the appended claims and their equivalents.

Claims

1. An active noise reduction system for a power steering motor, comprising: A power steering motor, which is arranged in the steering device of the vehicle to assist the steering of the vehicle; A signal collection module that obtains vehicle information for controlling a power steering motor; A microphone, which is used to collect the noise generated when the power steering motor is running; a speaker whose output is used to suppress the sound of noise generated when the power steering motor is operated; A storage device, which is used to pre-store vehicle information and noise generated when the power steering motor corresponding to the vehicle information is running; as well as a first controller electrically connected to the power steering motor, the signal collection module, the microphone and the storage device, to receive vehicle information from the signal collection module, and output a motor control signal for controlling the operation of the power steering motor to the power steering motor according to the received vehicle information, thereby controlling the operation of the power steering motor; when the power steering motor is running, receiving noise generated by the power steering motor from the microphone, matching the vehicle information with the noise generated when the power steering motor is running corresponding to the vehicle information, and sending the matched vehicle information and the noise generated when the power steering motor is running corresponding to the vehicle information to the storage device for pre-storage; When the first controller receives real-time vehicle information from the signal collection module, the real-time vehicle information is matched with the vehicle information pre-stored in the storage device to determine the noise generated when the power steering motor corresponding to the real-time vehicle information is running, so that the speaker outputs a sound with an opposite phase to the noise generated when the power steering motor is running.

2. The active noise reduction system for a power steering motor according to claim 1, wherein: The signal collection module comprises: a vehicle speed sensor for acquiring vehicle speed; and A torque angle sensor is provided on the steering device of the vehicle to obtain the torque of the steering wheel and the rotation speed of the steering wheel; The vehicle information includes vehicle speed, steering wheel torque and steering wheel rotation speed.

3. The active noise reduction system for a power steering motor according to claim 1, wherein: The signal collection module comprises: a vehicle speed sensor for acquiring vehicle speed; and A torque angle sensor is provided on the steering device of the vehicle to obtain the rotation direction of the steering wheel, the torque of the steering wheel and the rotation speed of the steering wheel; The vehicle information includes: vehicle speed, steering wheel rotation direction, steering wheel torque and steering wheel rotation speed.

4. The active noise reduction system for a power steering motor according to claim 2 or 3, wherein: The first controller performs Fourier transform on the noise generated by the power steering motor during operation received from the microphone to obtain frequency spectrum information of the noise; The storage device pre-stores vehicle information and frequency spectrum information of noise generated when a power steering motor corresponding to the vehicle information is in operation.

5. The active noise reduction system for a power steering motor according to claim 4, further comprising: The second controller is electrically connected to the first controller and the speaker to receive the spectrum information of the noise generated when the power steering motor is running corresponding to the real-time vehicle information from the first controller, generate a spectrum with an opposite phase to the noise generated when the power steering motor is running corresponding to the real-time vehicle information, and output a speaker control signal to the speaker for controlling the speaker to output the spectrum.

6. The active noise reduction system for a power steering motor according to claim 1, wherein: The microphone and the speaker are arranged near the power steering motor or near the driver.

7. A control method for an active noise reduction system for a power steering motor, comprising: The first controller receives vehicle information from the signal collection module, and outputs a motor control signal for controlling the operation of the power steering motor to the power steering motor according to the received vehicle information, thereby controlling the operation of the power steering motor; When the power steering motor is running, receiving the noise generated by the power steering motor from the microphone through the first controller, matching the vehicle information with the noise generated when the power steering motor is running corresponding to the vehicle information, and sending the matched vehicle information and the noise generated when the power steering motor is running corresponding to the vehicle information to the storage device for pre-storage; When real-time vehicle information is received from the signal collection module, the real-time vehicle information is matched with the vehicle information pre-stored in the storage device through the first controller to determine the noise generated when the power steering motor corresponding to the real-time vehicle information is running, so that the speaker outputs a sound with an opposite phase to the noise generated when the power steering motor is running.

8. The control method according to claim 7, wherein: The vehicle information includes at least one of a vehicle speed, a turning direction of a steering wheel, a torque of a steering wheel, and a rotation speed of a steering wheel.

9. The control method according to claim 8, further comprising: Performing Fourier transform on the noise generated by the power steering motor during operation and received from the microphone by the first controller to obtain frequency spectrum information of the noise; The storage device stores in advance vehicle information and frequency spectrum information of noise generated when the power steering motor corresponding to the vehicle information is operated.

10. The control method according to claim 9, further comprising: The second controller receives the spectrum information of the noise generated when the power steering motor is running corresponding to the real-time vehicle information from the first controller, generates a spectrum with an opposite phase to the noise generated when the power steering motor is running corresponding to the real-time vehicle information, and outputs a speaker control signal to the speaker for controlling the speaker to output the spectrum.

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