Fault detection method of secondary sound source in ANC system based on impedance characteristics

基于阻抗特性的ANC系统次级声源故障检测方法

¹ School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China
² Shaanxi Fenghuo Communication Group Co., Ltd, Baoji 721006, China
³ School of Computer Science, Xi'an Shiyou University, Xi'an 710065, China

Received: 28 March 2022

Abstract

As an indispensable component in an active noise control system, the working states of the secondary sound sources affect directly noise reduction and the robustness of the system. Therefore, it is very crucial to detect the working states of the secondary sound sources in the process of active control in real time. In this study, a real-time fault detection method for secondary sound sources during the process of active control is presented, and the corresponding detection algorithm is numerically given and experimentally verified. By collecting the input voltage and output current of the speaker unit, the sound quality factor is calculated to comprehensively judge the working state of the secondary sound sources. The simulation and experimental results show that the present method is simple and has low computational cost, can accurately reflect accurately the working states of the secondary sound sources in real time, and provides a basis for judging the operation of the active noise control system.

摘要

次级声源作为有源噪声控制系统中一个必不可少的组件, 其工作状态直接影响降噪效果及系统的稳健性, 因此在有源降噪过程中实时检测次级声源的工作状至关重要。提出了一种噪声控制过程中次级声源实时故障检测方法, 并对检测算法进行了数值分析和实验验证。通过采集次级声源喇叭单元的输入电压和输出电流, 计算出次级声源的发声品质因数, 综合判断次级声源工作状态。理论和实验结果表明, 所提方法计算简单、高效, 可以实时地准确反映出次级声源的工作状态, 为有源噪声控制系统正常运行提供关键的判断依据。