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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.
The inter-satellite link antenna driving mechanism (GDA) has the tasks of long life, big driving torque, high precision pointing and adapting to complex space environment, etc. The harmonic drive has the advantages of large reduction ratio, large carrying capacity and high transmission precision, Aviation and so on.The main design constraints are analyzed, the advantages and disadvantages of three kinds of biaxial configurations are compared, the block diagram of GDA single-axis driver based on harmonic drive is given, and the structure of the motor, harmonic reducer, The selection of angle sensor and the design points of electromechanical interface are discussed. The key technologies such as compact and lightweight structure layout, long-life lubrication and high-precision pointing are discussed. The verification test of long-life and high-precision acquisition tracking performance is introduced Program.