Anti-Radiation Performance Assessment of Satellite Units Based on the Weiner Process

In satellite anti-radiation reinforcement designs, it is necessary to specify the anti-radiation reinforcement index of the selected electronic components to ensure that the satellite has enough antiradiation adaptability. Traditional probability distribution models or 0-1 models use only the radiation dose at the moment of unit failure, and so, in the case of a small sample size, it may be difficult to obtain a credible estimation of the unit anti-radiation. Furthermore, due to the uncertainties of environmental conditions and manufacturing processes as well as the individual differences of various products, there exist differences and uncertainties for the anti-radiation abilities of individual units. Consequently, in this paper, a performance degradation model based on the Wiener process is constructed to characterize the law of the unit anti-radiation performance changes along with the total radiation dose levels. Finally, the anti-radiation performance of STRM60N20FSY is evaluated by the model proposed in this paper, and the average antiradiation, survival probability, and survival function of the unit product are also obtained.