基于谐波传动的星间链路天线驱动机构设计研究

星间链路天线驱动机构(GDA)具有长寿命、大驱动力矩、高精度指向和适应复杂空间环境的任务要求.谐波传动具有减速比大、承载能力大、传动精度高等优点,在航天、航空等多个领域广泛应用.分析了主要设计约束,比较了三种双轴构型的优缺点,给出了基于谐波传动的GDA单轴驱动器的结构框图,对电机、谐波减速器、测角传感器的选择以及机电热接口的设计要点进行了分析,论述了紧凑而轻量化的结构布局、长寿命润滑、高精度指向等关键技术,介绍了长寿命和高精度捕获跟踪性能的验证试验方案.

Design of Harmonic Drive-Based Gimbal Drive Assembly for ILA

A gimbal drive assembly(GDA) for intersatellite link antenna(ILA) is required with long life,huge drive torque,high pointing accuracy,and adaptability to complex and atrocious space environments.Harmonic drive with many advantages such as high reduction ratio,high loading capacity,and high transmission accuracy is applied widely in aeronautics and astronautics fields.Design constraints are briefly analyzed,advantages and disadvantages among three different types of dual-axis structures are campared,a type of structure layout for the single axis actuator is proposed,motor,harmonic drive and angle sensor as well as of points thermal interface design are analyzed,critical techniques including compact and lightweight structure,long life lubrication and high pointing accuracy are pointed,and finally test methods for verifing long life and high pointing accuracy are presented in this paper.