Research on Life Assessment Method of Spacecraft Optical Cable Based on Degradation Data

Abstract

Optical cable communication is an important development direction of spacecraft bus transmission due to its advantages of large capacity, light weight and low loss. This paper introduces the structure of optical cables for spacecraft and summarizes the main failure modes. During the on-orbit service, the product characteristics tend to deteriorate with the increase of service time. Loss coefficient is a sensitive parameter to characterize the degradation process. That is, loss coefficient has obvious degradation in the lifetime. In view of the degradation behavior, the loss coefficient is taken as the sensitive degradation parameter. The data obtained from accelerated test are used to establish the performance degradation model of optical cables, to clarify the degradation law. The particle filter method is used to predict the degradation trend and the service life, so as to provide guidance for engineering application.