Title :
A Partial-updated adaptive algorithm applied to multi-channel active control system for time-varying secondary paths
Author_Institution :
Sch. of Electron. & Inf., Northwestern Polytech. Univ., Xi´´an, China
Abstract :
For a multi-channel active control system with time-varying secondary paths, the more the number of the channels the system has,. the greater the computational load will be increased. In this paper, a new Partial-updated Filtered-x LMS (PFxLMS) Algorithm is proposed to reduce computational load. Firstly a Filtered-x LMS (FxLMS) Algorithm based on on-line modeling for secondary paths is derived. And then according to time-varying characteristics for secondary paths the weight coefficients of adaptive filters for active control and adaptive modeling are respectively updated partially such that the computational load can be largely reduced. The simulation results showed that the proposed algorithm reduces considerable noise with reasonable computational complexity compared with standard FxLMS and runs well.
Keywords :
active noise control; adaptive filters; adaptive filter; adaptive modeling; computational complexity; computational load; multi-channel active control system; on-line modeling; partial-updated adaptive algorithm; partial-updated filtered-x LMS algorithm; time-varying characteristics; time-varying secondary path; weight coefficient; Adaptive algorithm; Adaptive control; Adaptive filters; Computational complexity; Computational modeling; Control systems; Least squares approximation; Noise reduction; Programmable control; Time varying systems; active noise control; adaptive system; multichannel; partial update; secondary path modeling;
Conference_Titel :
Industrial Electronics and Applications (ICIEA), 2010 the 5th IEEE Conference on
Conference_Location :
Taichung
Print_ISBN :
978-1-4244-5045-9
Electronic_ISBN :
978-1-4244-5046-6
DOI :
10.1109/ICIEA.2010.5515333
