Title :
Active noise cancellation in ducts using internal model based control algorithms
Author_Institution :
Dept. of Control Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
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;
Conference_Titel :
Industrial Technology, 1994., Proceedings of the IEEE International Conference on
Conference_Location :
Guangzhou
Print_ISBN :
0-7803-1978-8
DOI :
10.1109/ICIT.1994.467202
