微小卫星激光通信粗跟机构设计与分析

针对微小卫星星间激光通信任务中快速、精确、稳定地捕获跟踪要求、卫星发射阶段严酷的力学环境以及严苛的重量尺寸限制,设计了一种适合微小卫星搭载的共口径收发二维粗跟机构。首先,由轴系支撑理论总结了精密轴系的设计原则,完成了结构设计,然后通过赫兹接触理论计算出过盈配合和预载荷作用下的轴承刚度,最后利用有限元分析方法分析了粗跟机构的力学特性。分析结果表明粗跟机构谐振频率满足卫星发射要求。结构设计具有结构紧凑、质量轻的特点,满足外包络尺寸、重量限制,轴系刚度设计合理。

Design and Analysis of Coarse Tracking Assembly for Micro-satellite Laser Communication Project

In order to meet the requirements for the small satellite laser communication of the fast,accurate and steady tracking capture, the harsh mechanics environment during satellite launch phase and the severe limits of weight and size, design a two-dimensional coarse tracking turntable suit for small satellites which transmit and receive light signals through the same optical path. First of all, supported by shaft system theory we points out the principles of precision shafts system design,and design the mechanical structure,and the bearing stiffness under the action of surplus and pre load had been calculated by Hertz contact theory. finally,the mechanical properties of two-dimensional turntable is ana-lyzed using finite element analysis method. Analysis results show that the structure design of turntable meet the require-ments outside the envelope size,weight restrictions,and shafting stiffness design is reasonable,the first resonance fre-quency satisfies the requirement of satellite launch,it has the characteristics of compact structure,light quality.