Dynamic Performance of Planetary Gear Joint for Satellite Antenna Driving Mechanism Considering Multi-Clearance Coupling

Dynamic pointing and tracking accuracy are the most relevant indicators of dynamic performance for satellite antenna driving mechanism. Multi-clearance coupling in joints will incur high-frequency vibration errors system. Joints existing analytical models generally oversimplified as planar revolute hinges, which ignore effect multi-clearance. It cannot proficiently predict behavior mechanism with multi-clearance on orbit. To address this problem, a typical 2K-H planetary gear joint model has been developed by considering radial clearance, backlash, tooth profile error, time-varying meshing stiffness, damping. A dual-axis is established to analyze characteristics multibody systems joints. The effects rotational speed, their under different modes explored numerical simulations. results show that clearance backlash have significant influence Appropriate design avails