An Improved Filtered x-LMS Algorithm Based On Feedforward Damping Compensation Of Secondary Path

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Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (4) : 113-116.

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An Improved Filtered x-LMS Algorithm Based On Feedforward Damping Compensation Of Secondary Path

LI Jia-quan, WANG Yong

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Abstract

Feedforward damping compensation method, a realization of damping compensation of secondary path, is studied, and it can be used to improve the performance of filtered x-LMS algorithm. Then, by combining the feedforward compensator and the adaptive feedforward controller, an improved filtered x-LMS algorithm based on feedforward damping compensation is designed. The improved algorithm still holds the virtues of filtered x-LMS algorithm, such as simple structure, excellent robustness, etc. A simulation of active control on a flexible cantilever’s first two modal vibration is carried out, in which standard and improved filtered x-LMS algorithm are respectively used. Simulation results show that the improved algorithm is capable of suppressing the first two modal vibration of cantilever in far less time than standard one.

Key words

secondary path / feedforward damping compensation / improved filtered x-LMS algorithm / robustness / cantilever

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LI Jia-quan;WANG Yong. An Improved Filtered x-LMS Algorithm Based On Feedforward Damping Compensation Of Secondary Path[J]. Journal of Vibration and Shock, 2009, 28(4): 113-116