Int J Performability Eng ›› 2018, Vol. 14 ›› Issue (11): 2711-2722.doi: 10.23940/ijpe.18.11.p17.27112722

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Degradation and Reliability Modeling of Two-Component System with Degradation Rate Interaction

Zhiyuan Yanga, *, Jianmin Zhaoa, Chiming Guoa, and Liying Lib   

  1. a Department of Management Engineering, Shijiazhuang Branch, Army Engineering University, Shijiazhuang, 050000, China;
    b College of Information, Hebei University of Science and Technology, Shijiazhuang, 050000, China
  • Submitted on ;
  • Contact: * E-mail address: yzy_sjz90@126.com
  • About author:Zhiyuan Yang is a Ph.D. student at Army Engineering University, Shijiazhuang, China. His current areas of research include degradation modeling and maintenance decision.Jianmin Zhao is a professor at Army Engineering University, Shijiazhuang, China. He received his Ph.D. degree from the University of Birmingham, Birmingham, UK. His areas of interest include PHM and maintenance decision.Chiming Guo is a lecturer at Army Engineering University, Shijiazhuang, China. He received his Ph.D. degree from the National University of Defense Technology, Changsha, China. His areas of interest include reliability engineering and maintenance engineering.Liying Li is a lecturer at Hebei University of Science and Technology, Shijiazhuang, China. She received her Master's degree from Shijiazhuang Tiedao University, Shijiazhuang, China. Her areas of interest include probability analysis and stochastic simulation.

Abstract: The stochastic dependency, which has a significant impact on degradation and reliability modeling, exists in many complex systems. The stochastic dependency is analyzed from a degradation processes interaction perspective in this paper. For a two-component system, a degradation rate interaction model is developed to describe the dependency between the degradations of two components with a nonlinear Wiener process. This is achieved by considering that the degradation rate of a component is affected by the degradation state of the other component in the proposed system. Then, the parameter estimation approach is given, and the reliability models of the components and system are derived. Finally, a numerical example about fatigue crack development is presented to validate the developed models. Moreover, a comparison study with some present models is taken to show the performance of the developed degradation and reliability models.

Key words: two-component system, stochastic dependency, degradation modeling, reliability, Wiener process