Title :
The effect of structured uncertainty in multichannel feedforward control systems
Author :
Omoto, A. ; Elliott, S.J.
Author_Institution :
Dept. of Acoust. Design, Kyushu Inst. of Design, Fukuoka, Japan
Abstract :
The algorithms used for adaptive feedforward control often require a model of the acoustic plant being controlled to update the signals driving the secondary sources. This paper describes the effect of practically realistic plant estimation errors on the stability and performance of such a control algorithm. We have considered the structured plant errors due to changes in the error sensors location, changes in the secondary sources location and drift in the excitation frequency. These errors have very different effects on the stability and performance of the control system. The characteristics of each types of plant error are examined by singular value decomposition of the transfer matrix
Keywords :
acoustic noise; acoustic signal processing; active noise control; adaptive control; adaptive signal processing; control systems; error analysis; matrix algebra; measurement errors; parameter estimation; singular value decomposition; stability; telecommunication channels; acoustic plant; active noise control; adaptive feedforward control algorithms; control algorithm stability; control system performance; control system stability; error sensors location; excitation frequency drift; multichannel feedforward control systems; plant estimation errors; secondary sources; secondary sources location; singular value decomposition; steepest descent algorithm; structured plant errors; structured uncertainty; transfer matrix; Acoustic sensors; Adaptive control; Control systems; Error correction; Estimation error; Frequency; Programmable control; Sensor phenomena and characterization; Stability; Uncertainty;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3192-3
DOI :
10.1109/ICASSP.1996.543283
