Reliability test method of airborne electronic components based on multi-stress accelerated degradation

Journal of Civil Aviation University of China ›› 2024, Vol. 42 ›› Issue (5): 1-8.

• Safety and airworthiness of civil aircraft • Next Articles

Reliability test method of airborne electronic components based on multi-stress accelerated degradation

WANG Peng1a,2#br# , TIAN Runcao1b#br# , DU Hongguang1b#br# , CONG Wei#br# 1c#br# , ZHANG Fan1a,2#br# ,#br# YU Guang3#br# , YANG Lyushan4#br#

1a. Research Institute of Science and Technology Innovation; 1b. College of Safety Science and Engineering; 1c. College of Electronic
Information and Automation, CAUC, Tianjin 300300, China; 2. Key Laboratory of Airworthiness Certification Technology for Civil
Aviation Aircraft, Tianjin 300300, China; 3. Xinjiang Branch of Engineering and Technology Affiliate of China Southern Airlines
Co., Ltd., Urumqi 830000, China; 4. Production and Technology Department of Wuhan Branch of China Eastern Airlines
Technology Co., Ltd., Wuhan 430000, China

Received:2024-03-15 Revised:2024-07-24 Online:2024-12-21 Published:2024-12-21

Abstract

Abstract: The reliability test is one of the important sources to obtain the basic safety data. Considering the actual working
environment of airborne equipment, where multiple stress act together to cause product failure and there are complex interaction, a reliability test method based on accelerated degradation of multi-stress generalized coupling is
proposed in this paper, which can directly obtain the basic safety data for airworthiness compliance verification.
Firstly, a nonlinear Wiener accelerated degradation model considering multi-stress generalized coupling is established, and the form of stress coupling is determined by combining correlation analysis. Secondly, maximum likelihood estimation and parameter optimization method based on the multi-stress accelerated degradation model is
proposed to solve the problem of multi-parameter estimation. Finally a three-stress accelerated degradation test is
carried out with an airborne LED chip as the object to realize the life assessment. The results show that, compared
with the traditional multi-stress accelerated model, the proposed method is closer to the actual working condition,
and the error is controlled within 1%, and the accuracy of life assessment is high, which can effectively solve the real airworthiness problem of missing and inaccurate of basic data.

Key words: airworthiness certification, civil aircraft system safety assessment, basic safety data, accelerated test technique;
multi-stress coupling

CLC Number:

V240.2

WANG Penga, , TIAN Runcaob , DU Hongguangb , CONG Wei c , ZHANG Fana, , YU Guang , YANG Lyushan. Reliability test method of airborne electronic components based on multi-stress accelerated degradation[J]. Journal of Civil Aviation University of China, 2024, 42(5): 1-8.

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Reliability test method of airborne electronic components based on multi-stress accelerated degradation

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