基于碳纤维框架天基目标探测二维跟踪转台结构优化

为满足某星载太阳辐照度光谱仪对太阳的跟踪指向技术要求,设计了一种二维转台系统.本文对该转台进行了结构的拓扑优化设计、有限元仿真及试验验证.首先,通过研究和比较现有的转台方案,确定以基本地平式作为转台的结构形式,选择性能优良的M55J碳纤维复合材料作为转台结构的主要材料,配合TC4镶嵌件来连接部件.根据拓扑优化结果和工程...

Structural optimization of 2-D tracking turntable with carbon fiber framework for spatial target detection

To optimize solar spectroradiometers on satellites,a spatial turntable is designed according to performance indexes;finite element analysis is conducted and the properties of the prototype are tested.First,various articles were consulted to determine the fundamental structure of the turntable,and the azi?muthal structure was selected.By researching the properties of different materials,M55J carbon fiber—which uses TC4 inserts for connection—was chosen as the main material for the turntable.The three main parts of the turntable are designed based on topological results and engineering experience;thus,a turnta?ble frame with a size of 966 mm×400 mm×730 mm and mass of 27.3 kg is designed.Next,simulation analysis is carried out,from which the natural frequency of the entire turntable is established as 58 Hz.This implies that the strength and stiffness of the turntable fulfill the optimization criteria.Finally,resis?tance and thermal vacuum tests are conducted on the prototype.Test results showed that the natural fre?quency of the turntable was 53 Hz and the variation of the turntable’s natural frequency was within 2%(si?nusoidal vibration)and 4%(random vibration).Furthermore,we observed that the turntable functioned normally in a vacuum.Accordingly,the proposed design is tenable.