On selecting sensor and actuator locations for ANC in ducts

Author

Toochinda, V. ; Hollot, C.V. ; Chait, Y

Author_Institution

MIE Dept., Massachusetts Univ., Amherst, MA, USA

Volume

3

fYear

2001

fDate

2001

Firstpage

2593

Abstract

We investigate the effects of microphone and speaker locations on the performance of active noise control in ducts. We study a so-called "symmetric" configuration in which the collocated performance microphone/control speaker and the collocated measurement microphone/disturbance source pairs are located equidistance from the duct center. By applying an "alignment angle" analysis to a duct model, we show this configuration to be prone to plant-disturbance misalignment. As a result, amplification at the measurement microphone and reduced stability margins occur. Stability robustness to modeling uncertainty is improved if the measurement microphone/disturbance source are de-collocated

Keywords

H^∞ control; active noise control; actuators; control system synthesis; feedback; feedforward; microphones; robust control; sensors; transfer functions; ANC; active noise control; actuator locations; alignment angle analysis; collocated measurement microphone/disturbance source pairs; collocated performance microphone/control speaker; duct acoustics; duct model; microphone locations; plant-disturbance misalignment; reduced stability margins; sensor locations; speaker locations; stability robustness; symmetric configuration; uncertainty; Acoustic sensors; Acoustic waves; Active noise reduction; Actuators; Control systems; Ducts; Loudspeakers; Measurement errors; Microphones; Robust stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Decision and Control, 2001. Proceedings of the 40th IEEE Conference on

Conference_Location

Orlando, FL

Print_ISBN

0-7803-7061-9

Type

conf

DOI

10.1109/.2001.980657

Filename

980657