Optimal design of acceleration isotropy based active vibration isolation stewart platform for spaceborne optical Instrument

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (2) : 109-114.

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Optimal design of acceleration isotropy based active vibration isolation stewart platform for spaceborne optical Instrument

TONG Zhi-zhong1；DUAN Guan-ren2; HE Jing-feng1；JIANG Hong-zhou1

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Abstract

To ensure high precision spaceborne optical instruments with natural precision, Stewart platforms was adopted as multi-dimension active vibration isolation system. Considering the mass geometry characteristics of the payload, analytical formulations of acceleration isotropy was derived based on the concept of acceleration isotropy. It discovers the relations between isotropy, architecture and characteristics of the payload. The formulation of compliant center was also deduced analytically. An invariable measure of any isotropy Stewart platform was given. The optimal design using motion orthogonality and acceleration isotropy was proposed to decrease the nonlinear and coupled affections, and a routine was established to generate a class of active vibration isolation Stewart platforms with acceleration isotropy.

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isotropy / stewart platform / active vibration isolation / optimal design / spaceborne optical instrument

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TONG Zhi-zhong;DUAN Guan-ren; HE Jing-feng;JIANG Hong-zhou. Optimal design of acceleration isotropy based active vibration isolation stewart platform for spaceborne optical Instrument[J]. Journal of Vibration and Shock, 2012, 31(2): 109-114