Design of multi-DOF vibration reduction device for spacecraft solar array

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (3) : 156-164.

ZHU Shiyao, LEI Yongjun, GUO Xin

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Abstract

The outstretched solar array on spacecraft causes two types vibration problems of driving disturbance and residual vibration. They occur in torsional direction and in bending one, and belong to forced vibration and free one. Here, an implementation scheme of multi-DOF vibration reduction device (MVRD) was proposed to adjust dynamic characteristics of the solar array driving system (SADS) for the purpose of reducing two kinds vibration disturbances. Firstly, the dynamic model of SADS was established based on the principle of virtual work to analyze the influence law of stiffness and damping parameters of MVRD on dynamic characteristics of SADS. Then, a prototype of MVRD was developed, and its vibration-reduction effect was verified with tests. The results showed that stiffness characteristics of MVRD are very important to natural frequencies of SADS, and these characteristics need to be carefully considered to avoid resonance; the equivalent damping of MVRD is positively correlated to modal damping of SADS, damping materials with high loss coefficient should be adopted; MVRD can reduce driving disturbance by more than 40% and the attenuation time for 99% residual vibration amplitude value by more than 56%.

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solar array / multi-DOF / residual vibration / driving disturbance / dynamic characteristics

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ZHU Shiyao, LEI Yongjun, GUO Xin. Design of multi-DOF vibration reduction device for spacecraft solar array[J]. Journal of Vibration and Shock, 2021, 40(3): 156-164

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