摘要
卫星用光纤陀螺的剩余寿命预测是卫星健康状态管理中的一个关键问题。针对传统的退化过程建模不能考虑同批设备中个体差异的问题,提出采用一种基于维纳过程的随机变量模型对光纤陀螺在空间环境下的退化特性进行建模。该模型将维纳过程中的漂移系数看成随机变量以描述个体差异,传统的维纳过程是其特例。依据该模型,可以得到光纤陀螺的可靠性指标和剩余寿命信息。仿真试验表明,文中提出的退化建模方法的精度明显高于传统方法,具有一定的工程应用价值。
Remaining useful life （RUL） prediction of the fiber-optic gyroscopes （FOG） working in the space environment is the key issue in health management of satellite. Among the literature about the reliability estimation of the FOGs based on degradation process, the current methods didn＇t consider the unit-to-unit variation of the equipments with the same type. Therefore, in this paper a random variable model based on Wiener process was presented to model the degradation process of the FOG for satellite. In the presented model, the drift parameter of the Wiener process was considered as a random variable to describe the unit-to-unit variation of different equipments, and the traditional Wiener process turns out to be its special case. Based on the model, the information of reliability and RUL can be obtained. The simulation results show that the proposed method can generate reasonably better results than the traditional model and thus can be potentially applied in practice.
出处
《红外与激光工程》
EI
CSCD
北大核心
2013年第12期3347-3352,共6页
Infrared and Laser Engineering
基金
国家自然科学基金(41174162
61174030
61104223
61374126)
关键词
光纤陀螺
退化
维纳过程
剩余寿命
fibre-optic gyroscope
degradation
Wiener process
remaining useful life
