Degradation Reliability Analysis Based on TOPSIS Model Selection Method

  • Yingkui Gu (古莹奎)Email author
  • Yanjun Shen (沈延军)
  • Dongping Yu (余东平)


It is necessary to determine the degradation path model of products at first when using the method based on degradation path model to evaluate the degradation reliability of products. At present, the degradation path model is mainly determined by scatter plots of degradation data. However, this method has strong subjectivity and is liable to cause the evaluation results to be inconsistent with the actual situation. In this paper, a degradation reliability analysis method based on TOPSIS (technique for order preference by similarity to an ideal solution) model selection is proposed, and its implementation process is given. The optimal degradation path model is selected according to the calculated proximity. With the help of TOPSIS method, various degradation path models can be selected and quantified, and the original degradation path method can be improved to avoid the risk of errors in product reliability evaluation caused by inaccurate subjective hypothesis, so as to ensure the objectivity and accuracy in the process of model determination. The validity and practicability of the proposed method are verified by the degradation analysis of the injector of a certain type of diesel engine.

Key words

performance degradation degradation path least squares estimation technique for order preference by similarity to an ideal solution (TOPSIS) reliability 

CLC number

TB 114.3 

Document code


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Copyright information

© Shanghai Jiao Tong University and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Yingkui Gu (古莹奎)
    • 1
    Email author
  • Yanjun Shen (沈延军)
    • 1
  • Dongping Yu (余东平)
    • 1
  1. 1.School of Mechanical and Electrical EngineeringJiangxi University of Science and TechnologyGanzhouChina

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