Active control method and device for automobile noise

A technology of automotive noise and active control, applied in the direction of mufflers, engine components, machines/engines, etc., can solve the problems of large mufflers, achieve cost saving, shorten development cycle, and ensure stable and long-lasting work

Active Publication Date: 2017-04-26
AUTOMOBILE RES INST OF TSINGHUA UNIV IN SUZHOU XIANGCHENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for active control of automobile noise to solve various problems caused by the large volume of the muffler in the prior art and the need to use a microphone

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  • Active control method and device for automobile noise
  • Active control method and device for automobile noise
  • Active control method and device for automobile noise

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[0050] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0051] The invention discloses an active control device for automobile noise, which includes a control unit 1 and an actuator 2 added in the exhaust system, such as figure 1 shown. The control unit judges the current operating condition by reading the engine speed and load information, selects the filter stored in the memory of the controller...

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Abstract

The embodiment of the invention provides an active control device and method for automobile noise. The device comprises a control unit and an execution mechanism connected with the control unit. The control unit comprises a reference signal acquisition unit, a working condition determination unit and a calibrated filter. The reference signal acquisition unit is used for acquiring a reference signal related to the automobile noise. The reference signal is obtained based on the engine rotation speed and the load information. The condition determination unit is used for determining a current working condition based on the reference signal and selecting the corresponding filter. The filter is used for generating an excitation signal based on the reference signal after being selected and outputting the excitation signal to the execution mechanism. The execution mechanism is used for generating secondary sound output based on the excitation signal. By the adoption of the active control device and method for the automobile noise, a main muffing part in a traditional muffler can be simplified, the occupied space and complexity of an exhaust system are lowered, only re-calibration is needed and the control unit needs to be updated for different vehicle models, the development cycle is shortened remarkably, and the active control device and method are suitable for modular development.

Description

technical field [0001] The invention belongs to the field of noise elimination, and in particular relates to an active control-based automobile noise elimination method and device. Background technique [0002] Existing automobile mufflers mostly adopt passive mufflers, which are bulky, take up too much space, and have a long design and development cycle. Moreover, for different types of mufflers such as different displacements, the layout and form of the mufflers need to be redesigned. [0003] The subsequent development of the feedforward active noise control device collects the reference signal and inputs it into the filter, and combines the error signal at the control point to obtain a secondary signal output for noise elimination. In this device, the reference signal and error signal are usually collected by a microphone. Due to the complex and harsh working environment of the exhaust system, the durability and reliability of the microphone are highly required, which i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N1/06
CPCF01N1/065
Inventor 齐松明郑四发王宇柳仲达
Owner AUTOMOBILE RES INST OF TSINGHUA UNIV IN SUZHOU XIANGCHENG
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