Improved structure for hybrid acoustic quality control system

A control system and feedback control technology, applied in active noise control, sound-generating devices, instruments, etc., can solve problems such as poor convergence and stability of filters, and achieve the effect of ensuring noise reduction and improving stability

Pending Publication Date: 2020-06-16
HARBIN ENG UNIV
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Problems solved by technology

Poor convergence and stability of filters in traditional control systems

Method used

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  • Improved structure for hybrid acoustic quality control system
  • Improved structure for hybrid acoustic quality control system
  • Improved structure for hybrid acoustic quality control system

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Embodiment Construction

[0016] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0017] to combine Figure 1-4 , figure 1 The structure of the improved hybrid active sound quality control system is shown. The system mainly includes three parts: the feedforward line spectrum noise sound quality control structure, the feedback broadband interference noise cancellation structure and the line spectrum noise cancellation control structure. The filter in the feedforward line spectrum noise sound quality control structure uses the FxLMS algorithm. By setting different gain factors, the offset, maintenance and amplification of the line spectrum noise amplitude can be controlled, so as to achieve the purpose of improving the line spectrum noise sound quality. The filter in the broadband interference noise cancellation structure of the feedback uses the FxLMS algorithm to mainly cancel the broadband interference noise in the system. The filter in the ...

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Abstract

The invention aims to provide an improved structure for a hybrid acoustic quality control system. The structure comprises a self-adaptive feedforward control structure, a self-adaptive feedback control structure and a line spectrum noise cancellation control structure, and sound quality control and a hybrid active noise control system are combined, so that the sound quality of line spectrum noisecan be controlled, and the interference of broadband noise on the system can be cancelled. By improving the synthesis mode of the feedback control structure reference signal in the hybrid active soundquality control system, the influence of updating of the weight coefficients of the feedback control filter and the line spectrum noise offset control filter on updating of the weight coefficients ofthe feedforward control filter can be reduced. According to the improved structure, the updating stability of the weight coefficient of the control filter can be improved, the convergence speed of the control filter is increased, and the noise reduction performance is improved.

Description

technical field [0001] The present invention relates to an active noise control system. Background technique [0002] With the development of active noise control technology, the study of sound comfort, that is, sound quality, has attracted widespread attention. Under broadband disturbance interference, in order to achieve sound quality control of line spectrum noise, a traditional hybrid active sound quality Control System. The convergence and stability of the filter in the traditional control system is poor. Contents of the invention [0003] The purpose of the present invention is to provide an improved structure for a mixed sound quality control system that improves the stability of a feedback-forward structure control filter while ensuring the amount of noise reduction. [0004] The purpose of the present invention is achieved like this: [0005] The present invention is an improved structure for mixed sound quality control system, which is characterized in that it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/178
CPCG10K11/17879G10K11/17817G10K11/17854G10K11/17815G10K2210/3026G10K2210/3027G10K2210/3028
Inventor 靳国永李善军叶天贵陈玉坤
Owner HARBIN ENG UNIV
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