电子功能部件环境适应性试验优化设计

doi:10.3969/j.issn.1001-506X.2020.07.27

Abstract

Abstract:

In order to evaluate the environmental adaptability of high-reliability and long-life electronic functional equipment, based on Monte Carlo simulation method, the fixed-censored step stress reduction test scheme is evaluated, and the simulation optimization is designed. Based on the electronic functional equipment's life-span model which obeys Weibull distribution, the environmental temperature is the main stress parameter, and the purpose of improving test efficiency and reducing test cost is combined with related failure models to establish the evaluation function of the test plan optimization. The establishment of the optimization degree evaluation function makes the environmental adaptability test scheme changing from qualitative analysis to quantitative analysis, and the optimal test scheme has higher timeliness and accuracy, which can obtain 44.8% on optimization compared with the general experience scheme.

Key words: Monte Carlo, environmental adaptability test, accuracy, timeliness, optimization

CLC Number:

TJ760.6

Weimin LYU, Yongqiang LI. Electronic functional equipment environmental adaptability test optimal design[J]. Systems Engineering and Electronics, 2020, 42(7): 1630-1636.

Figures/Tables 15

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References 31

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参数符号	参数含义	取值	获取途径
ε	疲劳韧性因子	0.325	材料参数
α	电子功能部件热膨胀系数/(l/k)	4.8×10^-6	材料参数
L	器件边缘长度/mm	20	设计参数
h	器件高度/mm	2	设计参数
C	内置校准因子	0.13	工程实际
F	经验修正因子	0.72	工程实际
T	电子功能部件环境温度/℃	自设	应力参数
t_d	高温持续时间/h	24	应力参数
S	加速寿命	循环数	计算值

环境温度/℃	失效数据个数	失效时寿命/h
40	10	15 270, 20 844, 18 774, 15 574, 17 910 14 590, 20 847, 17 157, 15 274, 19 054

实验结果	应力水平(/℃)及参数
	50		60		70		80		90		100
	m₁	η₁	m₂	η₂	m₃	η₃	m₄	η₄	m₅	η₅	m₆	η₆
实验数据	3.10	14 010	3.10	11 667	3.10	10 023	3.10	8 762	3.10	7 762	3.10	6 987
仿真结果	3.08	13 975	3.05	11 514	3.02	9 686	2.98	8 347	2.93	7 321	2.85	6 426
误差	0.65%	0.25%	1.61%	1.31%	2.6%	3.36%	3.87%	4.74%	5.48%	5.68%	8.06%	8.03%

实验结果	截尾数及参数
	10		30		50		70		90
	m₁	η₁	m₂	η₂	m₃	η₃	m₄	η₄	m₅	η₅
实验数据	3.10	17 528	3.10	17 528	3.10	17 528	3.10	17 528	3.10	17 528
仿真结果	2.89	16 236	2.93	16 560	2.99	16 846	3.03	17 120	3.05	17 259
误差	6.77%	7.37%	5.48%	5.52%	3.55%	3.89%	2.26%	2.32%	1.61%	1.53%

寿命误差	应力水平/℃
	50		70		90
	截尾数		截尾数		截尾数
	10	30	30	50	50	70
取值/%	4.88	4.15	4.57	3.72	4.99	3.83

Electronic functional equipment environmental adaptability test optimal design

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Figures/Tables 15

References 31

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实验时间	应力水平/℃
	50	60	70	80	90	100
	截尾数
	15	15	20	20	15	30
取值	15 388	12 637	14 188	12 975	7 494	13 402

优化度	(温度应力/℃,截尾数)
优化度	(50, 20)	(70, 20)	(90, 28)
取值	0.070 6	0.070 6	0.070 6

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寿命误差	应力水平/℃
	50				70				90
	截尾数				截尾数				截尾数
	10		30		30		50		50		70
	α	β	α	β	α	β	α	β	α	β	α	β
权重取值	0.35	0.65	0.26	0.74	0.44	0.56	0.32	0.68	0.62	0.38	0.45	0.55

优化度	(温度应力/℃,截尾数)
优化度	(86, 10)	(70, 12)	(92, 46)
取值	0.077 73	0.077 73	0.077 73

优化度	(温度应力/℃,截尾数)
优化度	(66, 26)	(78, 14)	(86, 8)	(94, 20)
取值	0.102 2	0.102 2	0.102 2	0.102 2

优化度	(温度应力/℃,截尾数)
优化度	(93, 18)	(50, 14)	(82, 11)	(61, 12)	(72, 13)
取值	0.097 18	0.097 18	0.097 18	0.097 18	0.097 18