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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (3): 325207-325207.doi: 10.7527/S1000-6893.2021.25207

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A new credibility evaluation method for accelerated degradation test based on area metric

SUO Bin1,2, YAN Ying3   

  1. 1. School of Information Engineering, Southwest University of Science and Technology, Mianyang 621010, China;
    2. National-Local Joint Engineering Laboratory of System Credibility Automatic Verification, Southwest Jiaotong University, Chengdu 611731, China;
    3. School of Economics and Management, Southwest University of Science and Technology, Mianyang 621010, China
  • Received:2021-01-05 Revised:2021-03-02 Online:2022-03-15 Published:2021-03-18
  • Supported by:
    Defense Industrial Technology Development Program; Equipment Development Department of People's Republic of China Central Military Commission Basic Research Project (171ZW31001); Advanced Research of National Defense Foundation of China (41424050101); National Natural Science Foundation of China (U183010080); Southwest University of Science and Technology Development Funds (21zx7125)

Abstract: To solve the problem that existing methods cannot quantify the credibility degree of Accelerated Degradation Test (ADT) results, a quantitative evaluation method is proposed based on area measurement.Based on the probability distribution distance between ADT data and baseline data, an area metrics for the credibility of ADT is constructed.On this basis, a normalized dimensionless index CIA is proposed.Then, based on the concept of data importance, multiple single-point CIA indexes are synthesized into one index that can reflect the credibility degree of the whole ADT of a product.The numerical examples show that the new metrics enables designers and decision makers to know the credibility degree of the product ADT results directly, and facilitates horizontal comparison of the credibility of ADT results of different products.The new metrics can be used in different data situations such as large sample, small sample and incredibly small sample, and has good universality.

Key words: Accelerated Degradation Test (ADT), normal stress test, credibility evaluation, area metric, normalization

CLC Number: