Active vibration isolation platform based on feedback FxLMS-robust hybrid control algorithm

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (19) : 59-67.

YANG Jinan1,2, JIAO Sujuan1,2, LONG Xinhua1,2

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Abstract

To address the contradiction between the convergence speed and stability in traditional FxLMS algorithms, as well as the impact of secondary channel model uncertainty on the control convergence performance, a feedback FxLMS robust hybrid control algorithm is proposed by combining the feedback FxLMS algorithm with a mixed sensitivity robust controller. The vibration control performance of the proposed hybrid control algorithm is simulated and verified by experiments on an active strut isolation platform in engineering applications. The simulation and experimental results of variable load excitation and control channel changes indicate that the acceleration response attenuation at each stage under different excitations exceeds 80%. Compared with the traditional FxLMS algorithm, the proposed hybrid control algorithm has faster convergence speed and stronger robustness.

Key words

active strut isolation platform / hybrid control / FxLMS / mixed sensitivity

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YANG Jinan1, 2, JIAO Sujuan1, 2, LONG Xinhua1, 2. Active vibration isolation platform based on feedback FxLMS-robust hybrid control algorithm[J]. Journal of Vibration and Shock, 2024, 43(19): 59-67

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