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Reliability Assessment of a Continuous-state Fuel Cell Stack System with Multiple Degrading Components

Wu, Xinying
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1556794664723115

Abstract Details

2019, Doctor of Philosophy (PhD), Ohio University, Industrial and Systems Engineering (Engineering and Technology).
This study is motivated by a degradation experiment conducted by an industrial collaborator on the long-term durability of a polymer electrolyte membrane fuel cell (PEMFC) stack. A PEMFC stack can be considered as a multi-component system composed of continuously degrading fuel cell components. The voltage degradation of the fuel cells causes the degradation of the stack system. The system degradation is assessed by using two system-level degradation measures: the overall stack output voltage and the minimum voltage of individual cells. This dissertation proposes a hierarchical Bayesian approach to predict the failure-time distribution of a stack which is randomly selected from its population and the remaining useful life (RUL) of a monitored PEMFC stack system by using the voltage degradation data collected from its fuel cell components. A two-term exponential function is adopted to describe the mean voltage degradation-paths of the fuel cell components and a hierarchical Bayesian degradation model is established to predict the stack system reliability. A Gibbs sampling algorithm is developed for the inference of the parameters in the hierarchical degradation model. Three alternative modeling approaches are explored and compared. This research will contribute to the degradation modeling and data analysis methods for continuous-state systems composed of continuous-state components.
Tao Yuan (Advisor)
78 p.
Industrial Engineering
Continuous-state systems; degradation analysis; failure-time distribution; Gibbs sampling; hierarchical Bayesian modeling

Recommended Citations

Citations

  • Wu, X. (2019). Reliability Assessment of a Continuous-state Fuel Cell Stack System with Multiple Degrading Components [Doctoral dissertation, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1556794664723115

    APA Style (7th edition)

  • Wu, Xinying. Reliability Assessment of a Continuous-state Fuel Cell Stack System with Multiple Degrading Components. 2019. Ohio University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1556794664723115.

    MLA Style (8th edition)

  • Wu, Xinying. "Reliability Assessment of a Continuous-state Fuel Cell Stack System with Multiple Degrading Components." Doctoral dissertation, Ohio University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1556794664723115

    Chicago Manual of Style (17th edition)

ohiou1556794664723115
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© 2019, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.