Research of the multi-state Deteriorating system failure Based on RPN and the multi-granularity linguistic system

摘要

Traditional FMEA lacks systematicness. A new approach of multi-state deteriorating system failure assessment is proposed base on the risk priority number (RPN) and multi-granularity linguistic information system. With this method, the key links and parameters of system deteriorating process is clear, and fault evolution analysis is more comprehensive. Policy iteration algorithm is introduced to calculate the optimal maintenance strategy under different fault conditions. Finally, numerical examples illustrate the failure analysis process; the results show that the new approach is efficient and practical.