航天器太阳帆板多自由度减振装置设计

航天器外伸的太阳帆板会引起驱动扰动和残余振动两类振动问题,且两者发生在不同的振动方向(扭转和弯曲),并属于不同的振动类型(强迫与自由振动).提出一种多自由度减振装置实施方案,通过调整驱动系统动态特性降低两类振动干扰.基于虚功原理建立了太阳帆板驱动系统动力学模型,分析了减振装置刚度和阻尼参数对驱动系统动态特性的影响规律,...

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

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%.