关键词: 活动机构；赫兹接触, 多体动力学, 摩擦力矩

Abstract:

To evaluate the life of solid lubricated bearings of rotation mechanism on the long life satellite, a physical quantitative model of the bearing failure mode was researched firstly combining with the theory of Hertz contact theory. Secondly, from the aspect of bearing dynamics,actual working conditions of the bearings which were installed on the single load were simulated through the computer simulation method, and the bearing contact friction properties and mechanical properties rule were gained. Finally, simulation results were verified with several measurable physical quantities through actual tests and then closed loop verification goal was achieved. Research results validate that the solid lubricated bearing dynamics modeling method is correct, and provide internal lubrication failure of low speed solid lubrication bearing with the quantitative criteria, and ultimately provide a method of improving the long life of two-dimensional scanning mechanism.

Key words: moving mechanism, Hertz contact, multi-body dynamics, friction torque