Title :
Stability analysis of robust adaptive filter used in feedforward and feedback compensation
Author :
Kajiki, M. ; Xin, J. ; Ohmori, H. ; Sano, A.
Author_Institution :
Dept. of Electr. Eng., Keio Univ., Yokohama, Japan
Abstract :
This paper proposes robust adaptive algorithms for adjusting coefficients of an adaptive filter which is used for feedforward control together with a feedback compensator. The filtered-x algorithm which is widely employed in adaptive signal processing cannot always assure the stability. Stability-guaranteed adaptive algorithms are given in time domain and frequency domain on a basis of the strictly positive real property of adaptive systems in the presence of unknown disturbances. Time domain algorithms can be applied to an IIR or FIR adaptive filter, while frequency domain approaches use a structure of adaptive frequency sampling filter. Numerical simulations and experimentally obtained results exhibited significant improvement on convergency and stability of the proposed adaptive algorithms in application to adaptive active noise control
Keywords :
FIR filters; IIR filters; acoustic noise; active noise control; adaptive filters; adaptive signal processing; convergence of numerical methods; feedback; feedforward; noise abatement; signal sampling; FIR adaptive filter; IIR adaptive filter; adaptive active noise control; adaptive algorithms; adaptive frequency sampling filter; adaptive signal processing; adaptive systems; coefficients; convergence; experimental results; feedback compensation; feedforward compensation; feedforward control; filtered-x algorithm; frequency domain algorithms; numerical simulations; robust adaptive filter; stability analysis; stability-guaranteed adaptive algorithms; strictly positive real property; time domain algorithms; Adaptive algorithm; Adaptive filters; Adaptive signal processing; Feedback; Finite impulse response filter; Frequency domain analysis; Robust control; Robust stability; Signal processing algorithms; Stability analysis;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on
Conference_Location :
Detroit, MI
Print_ISBN :
0-7803-2431-5
DOI :
10.1109/ICASSP.1995.480328