Title :
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
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;
Conference_Titel :
Decision and Control, 2001. Proceedings of the 40th IEEE Conference on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-7061-9
DOI :
10.1109/.2001.980657
