加速退化试验测量不确定度评定方法

doi:10.7527/S1000-6893.2023.27226

Abstract

Abstract:

Measurement dispersion， instrument errors and other factors bring about the measurement uncertainty problem in the accelerated degradation test. We propose a propagation and evaluation method for the measurement uncertainty of the accelerated degradation test to improve the accuracy and credibility of the test evaluation results. The sources of measurement uncertainty in accelerated degradation tests are firstly introduced and the propagation effect of measurement uncertainty in the parameter estimation process of the Wiener process accelerated degradation model analyzed. The Guide to the expression of Uncertainty in Measurement （GUM） method and Monte Carlo method （MCM） are then used respectively to evaluate the influence of performance observation data measurement uncertainty on product reliability evaluation results at normal stress levels. Finally， the accelerated degradation test of an actual type polymer sensor is conducted to verify the proposed methods， and comparative analysis of the results verifies the effectiveness of the proposed methods.

Key words: accelerated degradation testing, measurement uncertainty, GUM, Monte Carlo method, polymer sensor

CLC Number:

Hongxuan GUO, Fuqiang SUN. Measurement uncertainty evaluation method for accelerated degradation testing[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023, 44(7): 227226-227226.

Figures/Tables 10

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References 20

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试验水平序号	温度 T/℃	相对湿度RH/（%RH）	样本量n_l	试验时间t/h	测试间隔Δt/h
1	55	65	3	720	72
2	70	85	3	576	72
3	85	55	3	480	48
4	95	75	3	384	48

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Measurement uncertainty evaluation method for accelerated degradation testing

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