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Risk-Based Predictive Maintenance for Safety-Critical Systems by Using Probabilistic Inference

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  • Tianhua Xu
  • Tao Tang
  • Haifeng Wang
  • Tangming Yuan

Abstract

Risk-based maintenance (RBM) aims to improve maintenance planning and decision making by reducing the probability and consequences of failure of equipment. A new predictive maintenance strategy that integrates dynamic evolution model and risk assessment is proposed which can be used to calculate the optimal maintenance time with minimal cost and safety constraints. The dynamic evolution model provides qualified risks by using probabilistic inference with bucket elimination and gives the prospective degradation trend of a complex system. Based on the degradation trend, an optimal maintenance time can be determined by minimizing the expected maintenance cost per time unit. The effectiveness of the proposed method is validated and demonstrated by a collision accident of high-speed trains with obstacles in the presence of safety and cost constrains.

Suggested Citation

  • Tianhua Xu & Tao Tang & Haifeng Wang & Tangming Yuan, 2013. "Risk-Based Predictive Maintenance for Safety-Critical Systems by Using Probabilistic Inference," Mathematical Problems in Engineering, Hindawi, vol. 2013, pages 1-9, August.
    • Handle: RePEc:hin:jnlmpe:947104
    DOI: 10.1155/2013/947104
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