Systems Engineering and Electronics ›› 2023, Vol. 45 ›› Issue (10): 3350-3361.doi: 10.12305/j.issn.1001-506X.2023.10.40

• Reliability • Previous Articles    

Multi-stress accelerated life evaluation method considering generalized coupling

Fan ZHANG1,2, Runcao TIAN1, Peng WANG1,2,*, Lei DONG1,2   

  1. 1. College of Safety Science and Engineering, Civil Aviation University of China, Tianjin 300300, China
    2. Key Laboratory of Civil Aircraft Airworthiness Technology, Tianjin 300300, China
  • Received:2023-01-09 Online:2023-09-25 Published:2023-10-11
  • Contact: Peng WANG

Abstract:

Due to the complex aviation operation environment, the test method that only considers the separate action of multi-stress ignores the interaction between stresses, and it is difficult to accurately obtain the life index of domestic avionics components, which makes the life deviation of the theoretical results large. Thus, a multi-stress accelerated life evaluation method considering generalized coupling is proposed. Firstly, a multi-stress generalized coupling acceleration model considering the fuzzy mapping relationship of failure mechanism under actual engineering conditions is established, and fuzzy correlation is introduced to select the best coupling term. Then, the multi-stress generalized coupling maximum likelihood estimation method of different experimental types is constructed, and the adaptive sine cosine algorithm is used to solve the problem of difficult multi-parameter solution. Finally, a three-stress acceleration test is carried out on a low-noise amplification module of an airborne electronic device to achieve life evaluation. The results show that considering the generalized coupling is closer to the actual working environment, compared with the traditional numerical calculation method, the error is controlled within 5%, which proves the fast convergence and accuracy of the proposed method.

Key words: avionics, accelerated testing, multi-parameter estimation, multi-stress coupling, adaptive algorithm

CLC Number: 

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