Active noise cancellation in ducts using internal model based control algorithms

Author

Hu, Jwu-Sheng

Author_Institution

Dept. of Control Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

fYear

1994

fDate

5-9 Dec 1994

Firstpage

169

Lastpage

173

Abstract

A feedback control algorithm based on the “internal model principle” is proposed to the active noise control (ANC) problem in ducts. Because of its infinite open-loop gain, the controller is able to block noise transmission of selected frequencies at the cancellation speaker position. In other words, the speaker acts like a totally reflective boundary. Stability analysis of the closed loop system is given using the Nyquist criterion. Experimental results agree with the theoretical analysis and show an average of 30 to 40 dB reduction in noise level at target frequencies

Keywords

Nyquist criterion; acoustic noise; active noise control; closed loop systems; level control; stability; Nyquist criterion; active noise cancellation; cancellation speaker position; closed loop system; ducts; feedback control; infinite open-loop gain; internal model based control; noise level reduction; noise transmission; stability analysis; Acoustic noise; Active noise reduction; Adaptive filters; Ducts; Finite impulse response filter; Frequency; Noise cancellation; Noise level; Open loop systems; Signal processing algorithms;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Technology, 1994., Proceedings of the IEEE International Conference on

Conference_Location

Guangzhou

Print_ISBN

0-7803-1978-8

Type

conf

DOI

10.1109/ICIT.1994.467202

Filename

467202