微纳型空间相机被动式隔振系统设计

为了改善某型号微纳型空间相机在发射阶段的振动环境并避免相机发生破坏,针对微纳型空间相机的任务需求设计了一种被动式隔振系统。首先,对相机隔振系统进行了建模,研究了隔振系统的响应特性。然后,通过对隔振系统振动的耦合模型进行分析计算,实现了振动解耦并与传统分布形式进行了对比分析。根据相机结构参数和隔振系统模型,对被动式隔振器进行了计算与设计,基频为120 Hz且质量仅占相机的1.7%。最后,通过有限元分析方法对隔振系统进行了动力学仿真,并对相机本体和隔振系统分别进行了振动试验。试验结果表明,本研究被动式隔振系统对微纳型空间相机的正弦振动与随机振动响应隔振效率分别达到了55%和81%,隔振系统的有效性和合理性得到了验证。

Design of a passive vibration isolation system for micro-nano space camera

To improve the vibration environment of the micro-nano space camera during launch and avoid damage, a passive vibration isolation system is designed for the mission requirements of micro-nano space camera. Firstly, the camera vibration isolation system model is formulated and the response characteristics of the system is studied. Then, the vibration isolation system is decoupled and compared with the traditional method. Based on the camera parameters and the vibration isolation system, the passive rubber vibration isolator structure is calculated and designed. The fundamental frequency is 120 Hz and the mass fraction of camera is 1. 7 % . Finally, the dynamic simulation of the vibration isolation system is implemented by the finite element analysis method. The vibration tests of the space camera and the vibration isolation system are carried out. Experimental results show that the isolation efficiency of the passive vibration isolation system for the sinusoidal vibration and random vibration response of the micro-nano space camera can reach 55 % and 81 % , respectively. The validity and rationality of the vibration isolation system are verified.