Reliability analysis of retracting actuator with multi-state based on goal oriented methodology

In order to conduct effective reliability analysis of retracting actuator with multi-state (success state, safety failure state and action failure state), we redefine type-3 operator in goal oriented (GO) method to describe three states of main charge of retracting actuator and improve type-15 operator in GO method to describe the logic relations of multi-state output. The quantitative and qualitative reliability analyses of retracting actuator are made based on GO method in this paper. The system state probability of retracting actuator is obtained through quantitative analysis, and its weakness is found through qualitative analysis. The analysis results show that GO method is effective to improve the reliability of retracting actuator, and this method is also feasible for reliability analysis of other complicated initiating explosive systems.