Active control system and method for automobile road noise and automobile system

An active control system and road technology, applied in the direction of sound-generating devices, instruments, etc., can solve the problems of unfavorable passengers' experience of the acoustic environment in the car, and the noise level is not optimal

Pending Publication Date: 2020-10-27
AUTOMOBILE RES INST OF TSINGHUA UNIV IN SUZHOU XIANGCHENG +1
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Problems solved by technology

During the initial adaptation of the RNC system, the cabin noise level at the listener's ear position is not optimal, and may also be high

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  • Active control system and method for automobile road noise and automobile system
  • Active control system and method for automobile road noise and automobile system
  • Active control system and method for automobile road noise and automobile system

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Embodiment Construction

[0043] In order to enable those skilled in the art to better understand the solution of the present invention, and understand the purpose, technical solution and advantages of the present invention more clearly, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with specific embodiments and with reference to the accompanying drawings. Describe it completely. It should be noted that implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of ...

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Abstract

The invention discloses an active control system and method for automobile road noise and an automobile system. The active control system comprises a vibration sensor, a microphone, a loudspeaker anda controller. The vibration sensor and the microphone are both connected with the input terminal of the controller, and the loudspeaker is connected with the output terminal of the controller. The vibration sensor is used for collecting a road excitation signal generated by interaction of a road surface and wheels; the microphone is used for collecting an error noise signal in a vehicle and sending the signal as a feedback signal to the controller; the controller processes the error noise signal and the road excitation signal so as to update the time domain coefficient of adaptive filtering, and the controller is used for carrying out adaptive filtering processing on the road excitation signal and generating an offset noise signal. According to the invention, the convergence rate of the RNC system can be effectively increased when the vehicle driving working condition changes, and continuous updating of main control parameters of the RNC system is achieved based on the cloud.

Description

technical field [0001] The invention relates to the field of noise and vibration control, in particular to an active control system, method and vehicle system for automobile road noise. Background technique [0002] Active noise control systems used in automobiles generally use feedforward, feedback, or a combination of feedforward structures to attenuate target noise sources. When the car is running, the road noise generated by the interaction between the road surface and the tires is transmitted to the cabin through the suspension and the body as ambient noise. The ANC technology that eliminates this type of noise is called Road Noise Control (RNC). The RNC system is an adaptive least mean square system (Least Mean System, LMS). Its feedforward signal is generally the vibration signal that causes the vibration of the automobile suspension, and the feedback signal is generally measured by the error microphone arranged near the human ear in the car. The sound pressure signa...

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Application Information

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IPC IPC(8): G10K11/178
CPCG10K11/17854G10K11/1781G10K11/17873G10K11/17875
Inventor 彭博琚林锋范佳亮郑四发
Owner AUTOMOBILE RES INST OF TSINGHUA UNIV IN SUZHOU XIANGCHENG
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