Int J Performability Eng ›› 2019, Vol. 15 ›› Issue (9): 2392-2399.doi: 10.23940/ijpe.19.09.p12.23922399

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A Novel Safety Assessment Method based on Fault Dependent Matrix

Haiyong Donga,*, Qingfan Gub, Guoqing Wanga,c, Zhengjun Zhaia, and Yanhong Lua   

  1. aSchool of Computer Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China;
    bChina National Aeronautical Radio Electronics Research Institute, Shanghai, 200241, China;
    cSchool of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai, 200240, China
  • Submitted on ; Revised on ; Accepted on
  • Contact: *.E-mail address: donghaiyong@mail.nwpu.edu.cn

Abstract: Most traditional safety analysis methods express safety models with graphical forms, which are difficult to be stored in a computer and have limited analysis capabilities. Referring to the incidence matrix of Petri net, this paper proposes a novel fault dependent matrix for expressing the safety model. In addition, qualitative assessment algorithms are introduced from the top layer and bottom layer, as well as the quantitative assessment method. This paper takes a typical cooling system as an example to describe the process of construction and evaluation of the safety model. Based on the evaluation results, suggestions for improving system safety are proposed. Safety assessment based on a fault dependent matrix is more convenient when expressed and calculated by computers, and it is more likely to be promoted.

Key words: safety assessment, fault dependent matrix, cut set, reachability set