Vibration control strategy based on FxRLS adaptive inverse compensation

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (23) : 215-222.

WANG Min1,2,LIAO Songquan1,ZHONG Yuxuan1,3

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Abstract

To meet the increasing requirement of ultra-precision equipment carried in spacecraft for environmental vibration, the combination of Filtered-X Recursive Least Square (FxRLS) adaptive algorithm and inverse compensation method was proposed. Firstly, theoretical analysis was carried out from the dynamics model of isolator and adaptive inverse compensation. FxRLS was used to accurately track the response, and the inverse compensation was used to actively eliminate the vibration. To verify the effectiveness of this control strategy, verification systems were built in Simulink and experiment respectively. The results show that the control output can effectively track the vibration signal of payload under different excitations, and the tracking ratio can reach up to 99.97%. Compared with Filtered-X Least Mean Square (FxLMS), FxRLS has better comprehensive performance in tracking speed and tracking accuracy. In the experiment, the isolation ratio of random disturbance reaches 66.7% after applying FxRLS adaptive inverse compensation. Experimental and simulation results both prove the effectiveness of this control strategy.

Key words

vibration isolation / adaptive algorithm / inverse compensation control / tracking control

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WANG Min1,2,LIAO Songquan1,ZHONG Yuxuan1,3. Vibration control strategy based on FxRLS adaptive inverse compensation[J]. Journal of Vibration and Shock, 2023, 42(23): 215-222

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