一种基于延迟系数技术的次级通道在线辨识新方法

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (23) : 74-80.

论文

一种基于延迟系数技术的次级通道在线辨识新方法

浦玉学张方姜金辉徐菁蒋祺

作者信息 +

A new online secondary path modeling method based on Delay Coefficient Technique

Pu Yuxue Zhang Fang Jiang Jinhui Xu Jing Jiang Qi

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文章历史 +

摘要

工程中控制目标区域改变、误差传感器位置变化或其他因素会引起的次级通路的实时改变，精确的辨识次级通道传递函数可以有效的提高噪声主动控制效率。本文基于人工延迟系数技术提出一种新的次级通道在线辨识方法，推导出主动控制环节收敛步长和次级通路建模环节收敛步长的调整表达式，从收敛性能和算法计算量两方面跟传统算法进行比较，得出其改进优势。给出新的附加噪声功率控制策略，实现对附加随机噪声功率的调节，在保证系统稳定的情况尽量消除其对残余噪声的影响。最后，进行了算法仿真和噪声主动控制实验，结果表明本文算法具有收敛性好，降噪性能高的特点。

Abstract

Changes of control target area and errors sensor position or other factors may lead to the real-time change of the secondary path in practical engineering. Accurate identification of secondary path transfer function can effectively improve the efficiency of active noise control. This paper proposed a new online secondary path modeling method based on Delay Coefficient Technique. The proposed algorithm derived adjustment rules of the convergence step sizes of active control process and secondary path modeling. Comparing with the traditional algorithms in convergence performance and the computational complexity, the improvement advantages are gotten. The proposed algorithm also introduced an auxiliary noise power scheduling for achieving the adjustment of the additional random noise power to ensure system stability and eliminate its influence on the residual noise as soon as probability. Computer simulations and experiments show that the proposed method gives better performance in convergence and noise reduction than the existing methods.

导出引用

浦玉学张方姜金辉徐菁蒋祺 . 一种基于延迟系数技术的次级通道在线辨识新方法[J]. 振动与冲击, 2014, 33(23): 74-80

Pu Yuxue Zhang Fang Jiang Jinhui Xu Jing Jiang Qi. A new online secondary path modeling method based on Delay Coefficient Technique[J]. Journal of Vibration and Shock, 2014, 33(23): 74-80