Radiation Effects Evaluation Of Satellite Electric Power System Based On Quantifications Of Margins And Uncertainties

Satellite power system as an important part of the satellite, a long time in the space radiation environment, vulnerable to the effects of radiation. Therefore, the ability to assess radiation is significant for space industry development and application.In reality, because of the experimental expenditure, conditions, and other factors, it can only carry a small amount of radiation evaluation experiments, sometime not even the experiment. So small sample cases and difficult test is a big promblem in engineering.Therefore, with system-level radiation test small sample cases, an urgent need to carry out multifactor complex radiation evaluation system and application research, to validate and evaluate radiation performance of systems, analyse and improve systems radiation-hardness design, optimizate reinforcement technology, and make sure satellite do its jobs successful.To solve these problems, this paper, using QMU(Quantification of Margin and Uncertainty) approach, based on radiation performance system modeling and simulation, considering system tests and operational data, assess radiation performance of Satellite Power System, and best estimation of uncertainty. Mainly carried out the following research work.( 1) Research QMU principles, methods, and general process of its assessment of radiation-hardness.( 2) study the principles of satellite power system, analyse mathematical models of each part of power system.( 3) all components were analyzed to determine the effects of radiation greater critical components.And study the radiation damage mechanisms, to build its in-orbit performance degradation model.( 4) the use of QMU method, select the appropriate indicators and performance channel,to evaluate performance of the early life and the end life of the satellite power system.