Title :
Active attenuation of the sound outflowing from a one-dimensional duct
Author :
Sawada, Yuichi ; Ohsumi, Akira
Author_Institution :
Dept. of Mech. & Syst. Eng., Kyoto Inst. of Technol., Japan
Abstract :
In this paper, a feedback controller for reducing intensity of sound waves outflowing from a one-dimensional duct is established based on the modal representation approach. The duct is supposed to have a fan at one end and several electric speakers as actuators equipped on the wall of the duct. The noisy sound due to the fan is modeled by white Gaussian noise. The mathematical model of sound pressure in the duct is described by a kind of wave equations. In order to derive finite-dimensional controller, the solution of the mathematical model is expanded by modal functions. The controller is constructed using the LQG theory, and its efficacy is demonstrated by simulation studies
Keywords :
Gaussian noise; acoustic intensity; active noise control; control system synthesis; feedback; linear quadratic Gaussian control; multidimensional systems; wave equations; white noise; 1D duct; LQG controller; active noise attenuation; active sound attenuation; actuators; electric speakers; fan; feedback controller; finite-dimensional controller; noisy sound; sound wave intensity reduction; wave equations; white Gaussian noise; Acoustic noise; Adaptive control; Attenuation; Ducts; Feedback; Gaussian noise; Loudspeakers; Mathematical model; Noise cancellation; Noise reduction;
Conference_Titel :
Control Applications, 2001. (CCA '01). Proceedings of the 2001 IEEE International Conference on
Conference_Location :
Mexico City
Print_ISBN :
0-7803-6733-2
DOI :
10.1109/CCA.2001.974002
