Research on fault risk analyzing method of satellite power system based on ripple effect

Satellite power system functional structure is complex, a component failure not only affect the part of the ability to complete its function, but also may spread to other components, leading to the entire system of abnormal or fault, resulting in degradation of system performance or functional degradation. On the basis of functional fault identification and propagation process analysis, this paper proposes a fault risk analysis method based on ripple effect for satellite power system. In this method, by analyzing the correspondence between the functional model of the system and the state model, using the functional failure logic, Simulink simulation model is used to study the influence of component failure in the system, according to component failure affecting the relationship established Petri net model, analyzing system fault risk. The example shows that this method is of great significance to effectively identify and analyze the risk of satellite power system failure and ensure the safe operation of the system.