Cooperative control for vibration isolation and suppression based on Stewart platform

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (7) : 186-194.

WANG Jiaming, KONG Yongfang, HUANG Hai

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Abstract

Stewart platform is often taken as a connection device between a satellite and precise load and a device for vibration isolation and suppression. However,the existing control methods based on Stewart platform can’t realize cooperative control of broadband vibration isolation and suppression. Aiming at this problem,a control method combining adaptive filtering with Skyhook was proposed. The adaptive filtering method was used to realize cooperative control of vibration isolation and suppression,but the platform feature of small damping ratio had a negative effect on its stability. Skyhook was taken as the control inner loop to increase active damping. The test results showed that when the upper plate and lower one of the platform are both disturbed,the decay of the upper plate’s acceleration response can reach more than 12 dB within the frequency range of 6-50 Hz,the effectiveness of the cooperative control for broadband vibration isolation and suppression is verified; compared with the single adaptive filtering control method,the proposed method has a better stability.

Key words

micro-vibration / Stewart platform / adaptive filtering / vibration isolation / vibration suppression

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WANG Jiaming, KONG Yongfang, HUANG Hai. Cooperative control for vibration isolation and suppression based on Stewart platform[J]. Journal of Vibration and Shock, 2019, 38(7): 186-194

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