Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (12): 3732-3740.doi: 10.12305/j.issn.1001-506X.2021.12.38

• Reliability • Previous Articles    

Grey FMECA model based on ordering of grey point in rectangular region under the background of poor information

Zhiyuan LI, Sifeng LIU, Zhigeng FANG*, Yuexin XIA   

  1. College of Economics and Management, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2021-02-05 Online:2021-11-24 Published:2021-11-30
  • Contact: Zhigeng FANG

Abstract:

Under the background of poor information, it is difficult to implement the failure mode, effects and criticality analysis (FMECA) on products due to limitations such as lack of failure information and uncertain failure data. At the same time, in order to overcome the drawbacks of the quantitative criticality matrix analysis method, a grey FMECA model suitable for poor information background is proposed. Firstly, the criticality matrix diagram is standardized, the dimensions of the horizontal and vertical axes are unified, and the concept of criticality weight ratio is proposed to standardize the mapping ratio. In addition, interval grey numbers are introduced into criticality calculation, and the concept of grey point in the rectangular region is proposed to characterize the hazards of failure modes that are difficult to ascertain.Finally, general ordering rules for grey points in the rectangular region are given according to the enlightenment from decision-making under uncertainty, which provide solutions to the ordering of the criticality of failure modes under poor information background. A case study of the high-pressure fuel turbopump in a space shuttle's main engine verifies the validity of the proposed model.

Key words: poor information, failure mode; effects and criticality analysis (FMECA), interval grey number, grey point in rectangular region, criticality matrix

CLC Number: 

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