CAJ | 학술논문

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。
위성용광섬타라적잉여수명예측시위성건강상태관리중적일개관건문제。침대전통적퇴화과정건모불능고필동비설비중개체차이적문제，제출채용일충기우유납과정적수궤변량모형대광섬타라재공간배경하적퇴화특성진행건모。해모형장유납과정중적표이계수간성수궤변량이묘술개체차이，전통적유납과정시기특례。의거해모형，가이득도광섬타라적가고성지표화잉여수명신식。방진시험표명，문중제출적퇴화건모방법적정도명현고우전통방법，구유일정적공정응용개치。
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.