基于DSP的主动噪声控制系统研究与硬件实现

发布时间：2018-04-04 15:19

本文选题：主动噪声控制　切入点：自适应滤波器　出处：《浙江工业大学》2013年硕士论文

【摘要】：工业发展带来的噪声成为一种污染,它严重影响了人们的身体健康及社会发展,因而对噪声的控制研究十分必要。主动噪声控制具有中低频段噪声控制效果好,系统轻便等优点,可以弥补传统控制方法的不足,使用高性能、低功耗的DSP实现自适应算法使主动噪声控制逐渐发展成一门新兴的实用技术。主动噪声控制系统针对不同的实际场景有不同的系统结构以及算法,基于FX-LMS自适应滤波器降噪算法及其各种改进型算法是目前最为最为广泛采用的算法。本文主要学习与研究了主动噪声控制的基本原理及实现技术,具体内容及贡献如下： 1.研究了主动噪声控制系统,主要包括前馈主动噪声控制系统及反馈主动噪声控制系统,并对在实际应用中主要采用的前馈主动噪声控制系统进行了重点分析及讨论。 2.介绍了前馈主动噪声控制系统中的几种降噪算法,其中重点介绍了FX-LMS算法原理及其性能分析。对前馈主动噪声控制系统中的几种降噪算法进行MATLAB仿真,并对仿真结果进行分析比较。 3.学习了基于TMS320C5509A DSP板的硬件实现原理,并对实际环境下硬件资源的合理配置进行了优化分析研究。 4.搭建了一个基于DSP的前馈主动噪声控制管道平台,并对降噪算法FX-LMS进行软件设计。在此基础上,进行了降噪实验,实验结果表明,主动噪声控制有一定的降噪效果。
[Abstract]:The noise brought by industrial development becomes a kind of pollution, which seriously affects people's health and social development, so it is necessary to study the control of noise.Active noise control has the advantages of good noise control effect in medium and low frequency band, portable system and so on. It can make up for the shortcomings of traditional control methods and use high performance.Low power DSP implementation adaptive algorithm makes active noise control gradually develop into a new practical technology.Active noise control systems have different system structures and algorithms according to different actual scenes. Noise reduction algorithm based on FX-LMS adaptive filter and its various improved algorithms are the most widely used algorithms at present.This paper mainly studies the basic principle and realization technology of active noise control. The specific contents and contributions are as follows:1.The active noise control system, including feedforward active noise control system and feedback active noise control system, is studied, and the feedforward active noise control system used in practical application is analyzed and discussed emphatically.2.In this paper, several noise reduction algorithms in feedforward active noise control system are introduced, and the principle and performance analysis of FX-LMS algorithm are emphasized.Several noise reduction algorithms in feedforward active noise control system are simulated by MATLAB, and the simulation results are analyzed and compared.3.The principle of hardware implementation based on TMS320C5509A DSP board is studied, and the optimal allocation of hardware resources in actual environment is studied.4.A feedforward active noise control pipeline platform based on DSP is built, and the noise reduction algorithm FX-LMS is designed.The experimental results show that the active noise control has a certain effect on noise reduction.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TB535

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