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Modeling, Control and Experiment of a Feedback Active Noise Control System

Summary: 0
Modeling, Control and Experiment
of a Feedback Active Noise Control System
for Free Sound Fields
Shuichi Adachi and Hisashi Sano
Key words : active noise control, acoustics, physical modeling, system identification,
H control, automobile
Shuichi Adachi is with the Department of Electrical and Electronic Engineering, Utsunomiya University, 7-1-2
Yoto, Utsunomiya, Tochigi, 321-8585 Japan, E-mail:adachis@cc.utsunomiya-u.ac.jp
DRAFT June 4, 2003
Feedback active noise control (FB-ANC) systems need no reference signal sensors and their
implementation cost is therefore attractive due to the relatively simple configuration. This paper
reports the design of an FB-ANC system for free sound fields by H control theory based on a
lower-order infinite impulse response (IIR) model of the acoustic plant. The acoustic plant, which
is an acoustic transmission system from a loudspeaker (i.e. the actuator) to an error microphone
(i.e. the sensor), is first devised by using the physical modeling method in conjunction with a
system identification result. The feedback controller is next designed to attenuate the noise level
in the vicinity of the error sensor by reducing the sensitivity function over the frequency range of


Source: Adachi, Shuichi - Electrical and Electronic Engineering, Faculity of Engineering, Utsunomiya University


Collections: Engineering