基于多变量优化的恒定应力加速退化试验设计

doi:10.3969/j.issn.1001-506X.2021.01.33

Abstract

Abstract:

In order to carry out the accelerated degradation test for high reliability and long-life products efficiently, an optimal design method of constant stress accelerated degradation test are proposed, which can simultaneously optimize acceleration stress level, sample number and test time at each level. The accelerated degradation model is constructed based on the Wiener process and the Arrhenius model. The estimation accuracy of reliable life is taken as objective function, and the total cost of the test is defined as the constrain. The genetic algorithm is applied to realize the search of the optimal test scheme, and the effectiveness of the optimal scheme is rerified through the sensitivity analysis. An accelerated degradation test for a carbon film resistor is optimally designed as a case study to demonstrate the rationality of the proposed method. Finally, the sensitivity of the model parameters to the optimization results is analyzed to illustrate the robustness of the optimal design procedure.

Key words: constant stress accelerated degradation, optimal test design, multivariate optimization, Wiener process

CLC Number:

V488
O231

Gen LIU, Zhihua WANG, Huaiyuan QU, Lu LI, Chengrui LIU. Constant stress accelerated degradation test design based on multivariate optimization[J]. Systems Engineering and Electronics, 2021, 43(1): 267-271.

Figures/Tables 3

References 16

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费用约束/元	S₁/K	S₂/K	m₁	m₂	n₁	n₂	f/h	Avar/h²	总费用/元
C_b=10 000	423	456	11	4	8	26	195	26.78	9 997
C_b=12 000	423	454	8	7	33	35	170	16.94	11 988
C_b=15 000	425	456	6	9	55	41	145	14.23	13 119

试验方案	S₁/K	S₂/K	m₁	m₂	n₁	n₂	f/h	Avar/h²	总费用/元
M₀	423	454	8	7	33	35	170	16.94	11 988
M₁	403	463	8	7	30	30	200	17.49	12 000

模型参数	S₁/K	S₂/K	m₁	m₂	n₁	n₂	f/h	Avar/h²	总费用/元
(a, b, σ)	423	454	8	7	33	35	170	16.94	11 988
(110%a, b, σ)	423	453	8	7	32	35	171	16.91	11 942
(90%a, b, σ)	425	455	8	7	32	35	173	16.78	11 982
(a, 110%b, σ)	425	454	8	7	33	32	180	16.72	11 985
(a, 90%b, σ)	425	455	8	7	33	32	180	16.40	11 985
(a, b, 110%σ)	423	455	8	7	33	31	180	16.41	11 935
(a, b, 90%σ)	425	455	8	7	33	32	180	16.96	11 985

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Constant stress accelerated degradation test design based on multivariate optimization

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