Fault analysis to improve reliability of a LEO satellite EPS

摘要

Small satellites are becoming popular for space missions due to the lower cost of manufacturing and deployment. The reduction of costs caused by a small over sizing of the components makes the simulation more important to estimate the behavior of the satellite both in the case of normal operation and in case of failure of some components. In this paper a safety strategy for a peak power tracker architecture with an unregulated bus is presented. The proposed policy is divided in two levels; a low level strategy determines the fault occurrences while the management of loads is demanded to the high level policy. Simulation results show the effectiveness of the proposed solution and the impact of the strategies on the fault diagnosis.