长寿命卫星活动机构固体润滑轴承特性

为对长寿命卫星活动机构固体润滑轴承进行寿命评价，首先结合赫兹接触理论研究轴承失效的物理量化模型；其次，应用Adams从轴承动力学的角度模拟其安装于单机载荷上的实际工况，得到轴承内部接触摩擦特性及受力特性变化规律；最后，通过试验及得到的相关数据对仿真结果进行闭环验证.研究结果验证该类固体润滑轴承动力学建模方法的正确性，为低速固体润滑类轴承内部润滑失效提供定量的判据，并对最终提高二维扫描机构长寿命的方法提供借鉴.

Solid lubricating bearing characteristics of long life satellite rotation mechanism

To evaluate the life of solid lubricated bearing of rotation mechanism on the long life satellite, firstly, the physical quantitative model of the bearing failure mode is researched combining with the theory of Hertz contact theory. Secondly, from the aspect of bearing dynamics, the actual working condition of the bearing which is installed on the single load is simulated through Adams and the bearing contact friction properties and mechanical properties rule are gained. Finally, the simulation results are verified with several measurable physical quantities through actual test and the closed loop verification goal is achieved. The research results validate that the solid lubricated bearing dynamics modeling method is correct, which can provide internal lubrication failure of low speed solid lubrication bearing with the quantitative criteria. Finally, a method on improvement of the long life of 2D scanning mechanism is proposed.