航天器机构固体润滑球轴承的加速寿命试验方法  

A Method of Accelerated Life Test for Solid-lubricated Ball Bearings of Spacecraft Mechanisms

作　　者：李新立[1] 刘志全[1] 遇今[1] 

机构地区：[1]中国空间技术研究院,北京100094

出　　处：《航天器工程》2008年第5期82-87,共6页Spacecraft Engineering

基　　金：中国航天科技集团公司可靠性专家组自主研发课题

摘　　要：给出了加速寿命试验的一般流程,论述了长寿命航天器机构固体润滑球轴承的恒定应力加速寿命试验方法,包括加速应力类型、加速模型、应力水平、试验环境、试验件数量、试验测试参数、失效判据、试验终止条件、数据处理等要素的确定原则和方法。针对某航天器天线指向机构固体润滑球轴承,给出了具体的加速寿命试验方案示例。A flow chart of accelerated life tests is given, and a method of accelerated life test with constant-stress for solid-lubricated ball bearings of long life spacecraft mechanisms is discussed, which includes some principles and methods of deciding such important factors of the accelerated life test as accelerated stress type, accelerated model, accelerated stress levels, test conditions, the sample number, parameters needed to be measured, ball bearing failure criterions, test termination criterions, test data treatment and so on. An example of the accelerated life test scheme for the solid-lubricated ball bearings of a certain spacecraft＇s antenna pointing mechanism is demonstrated.

关 键 词：航天器 机构 固体润滑 球轴承 加速寿命试验 

分 类 号：V423[航空宇航科学与技术—飞行器设计] TH117.1[机械工程—机械设计及理论]