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

Abstract

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

Meshing Mechanism and Simulation Analysis of Silent Chain Based on Rigid-Flexible Intelligent Dynamics Technology

“…Through the flexible treatment of chain plate and pin shaft, scholars analyzed the stress in the meshing process of chain plate. The wear of the working chain plate of the silent chain is relatively uniform, so it can maintain good transmission accuracy [ 3 ]. In the mechanical field of many transmission modes, the application of silent chains is becoming more and more extensive, and superior transmission performance is becoming more and more prominent.…”

Dynamic model of fine-pitch gear pair considering multi-clearance coupling

“…Fig.1 Model of radial clearanceFig.2Model of dynamic backlash During the engagement process, the backlash can be considered as a dynamic value, which is represented by the center distance[8] . The backlash of the external meshing gear pair is shown in the Fig.2BC is the dynamic backlash b t .…”