Reliability analysis for high-lift device based on Copula function and Bayesian updating. (December 2018)

• Record Type: Journal Article
• Authors: Feng, Jiazhen; Zhang, Jianguo; Qiu, Jiwei
• Is Part Of: Advances in mechanical engineering. Volume 10:Number 12(2018)
• Publication Date: 2018-12
• Subjects: Reliability -- correlation -- Bayesian updating -- Copula function -- high-lift; Mechanical engineering -- Periodicals; 621.05
• DOI: 10.1177/1687814018819297
• Languages: English
• ISSNs: 1687-8132

Abstract

In order to improve the reliability analysis accuracy of the aircraft high-lift, an approach based on the Copula function theory and Bayesian updating is proposed. Considering the influence of the random variables' correlation in the process of updating, choosing the reasonable prior joint distribution and likelihood function is crucial. Under the condition of the incomplete probability information, the analytic expressions of the prior joint distribution and likelihood function of the correlated random variables are derived through the Copula function. Then, the posterior joint distribution is obtained by Bayesian updating. The reliability of the lifting device is calculated based on the posterior distribution. The case analysis shows that the reliability results based on the proposed approach are more accurate and more coincident with the factual situation than the reliability analysis results based on the independence assumption of random variables.