基于确信可靠性的功能、性能与裕量分析方法

doi:10.12305/j.issn.1001-506X.2021.05.31

Abstract

Abstract:

Belief reliability theory is a newly proposed reliability theory in recent years. In belief reliability theory, performance margin is a core concept for reliability measurement and analysis. How to identify critical performance parameters and analyze their margins during the product design process have become important issues to be primarily resolved. Therefore, a new formal analysis method, called function, performance and margin analysis (FPMA) is proposed, to clarify the relationship between product function and performance, identify critical performance parameters and thresholds, and to provide information and cognitive foundation for the following margin modeling process. This paper elaborated on the connotation and basic flow of FPMA in detail and clarifies its application value in the product life cycle. A case study of an electrical connector's FPMA is also carried out. The results show that the FPMA can fully explore the reliability-related information of products, which is conducive to truly integrating reliability into the products' design process.

Key words: belief reliability, performance margin, critical performance parameter

CLC Number:

TB114.3

Qingyuan ZHANG, Meilin WEN, Rui KANG, Boyuan LI, Li YU. Function, performance and margin analysis method based on belief reliability[J]. Systems Engineering and Electronics, 2021, 43(5): 1413-1419.

Figures/Tables 7

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References 26

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	性能A1	性能A2	性能B1	性能C1	性能C2
性能A1	1	3	5	7	7
性能A2	1/3	1	5	3	3
性能B1	1/5	1/5	1	1/3	1/3
性能C1	1/7	1/3	3	1	1
性能C2	1/7	1/3	3	1	1

a_ij取值	评价标准
1∶1	性能i和性能j的重要程度相当
3∶1	性能i比性能j略微重要
5∶1	性能i比性能j重要
7∶1	性能i比性能j重要很多

性能分解		编号	相关设计参数	相关使用参数
导电性能	接触电阻	A1	端子横截面积端子材料导电率接触区域电镀规格	无
导电性能	温升	A2	端子横截面积端子材料导电率	温度
绝缘性能	绝缘电阻	A3	材料固有阻抗相邻导插孔距离	温度、湿度
防水性能	浸水时间	A4	胶芯材料O型圈硬度及压缩量包胶粘合力	浸水深度、温度
连接性能	插入力	A5	插孔、插针配合过盈量插头、插座胶芯干涉量	无
	拔出力	A6	插孔、插针配合过盈量插头、插座胶芯干涉量	无
	螺栓螺母拉脱力	A7	螺栓螺母尺寸与胶芯装配干涉量	无

关键性能参数	设计名义值	阈值	相应使用参数	参数类型	裕量名义值
接触电阻	3 mΩ	10 mΩ	无	望小	7 mΩ
绝缘电阻	6 000 mΩ	5 000 mΩ	温度: 25℃湿度: 20%~80%	望大	1 000 mΩ
绝缘电阻	2 500 mΩ	1 000 mΩ	温度: 45℃湿度: 90%~95%	望大	1 000 mΩ
拔出力	2.5 kg	1.3 kg	无	望大	1.2 kg

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Function, performance and margin analysis method based on belief reliability

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