Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (8): 2362-2372.doi: 10.12305/j.issn.1001-506X.2021.08.40

• Reliability • Previous Articles    

Simulation assessment method for multi-state system reliability and mission success probability considering time-dependent faults

Haojie YANG, Jianwei LYU, Yifan XU*   

  1. Department of Management Engineering and Equipment Economics, Naval University of Engineering, Wuhan 430033, China
  • Received:2020-06-16 Online:2021-08-01 Published:2021-08-05
  • Contact: Yifan XU

Abstract:

Aiming at the problem of system reliability and mission success probability assessment considering time-dependent faults, multi-state performance output, and system redundancy, the analytical method is difficult to model and solve, and the general simulation method has poor sampling efficiency and low estimation accuracy. A Monte-Carlo simulation assessment method combining time-dependent faults sampling and statistical variance reduction is proposed. First, a numerical algorithm for non-exponential residual distribution sampling is designed to implement random event sampling for time-dependent faults. Then, combining with the variance reduction methods such as forced transition and failure biasing, the simulation sampling efficiency of small probability events and the estimation accuracy of the simulation method are improved. Finally, the example of the warship's sail mission verifies the rationality and effectiveness of the proposed method for assessing the system reliability and mission success probability under complex system behavior and fault mechanism.

Key words: mission reliability, multi-state system, non-exponential distribution, indirect Monte-Carlo, variance reduction method

CLC Number: 

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