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.
YU Dongping (余东平)
,
GU Yingkui *(古莹奎)
,
SHEN Yanjun (沈延军)
. Degradation Reliability Analysis Based on TOPSIS Model Selection Method[J]. Journal of Shanghai Jiaotong University(Science), 2019
, 24(3)
: 351
-356
.
DOI: 10.1007/s12204-019-2067-5
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