某型电子程控器可靠性仿真分析与优化设计

Reliability simulation analysis and optimization design of the electronic control proceeding controller

随着人们对电子产品可靠性的要求越来越高,利用失效物理方法识别产品潜在的薄弱点在产品设计中备受关注。基于失效物理理论,采用可靠性仿真分析方法,对电子程控器进行可靠性分析。通过建立电子程控器数字样机模型,开展相应的应力分析与故障预计,评估电子程控器可靠性指标平均首发故障时间(MTTFF),并根据仿真分析发现的薄弱环节进行优化设计。结果表明:可靠性仿真结果与理论计算结果相差较小,可以作为型号可靠性指标评估的依据,减少采用物理样机进行可靠性试验的周期和费用;优化改进后的电子程控器其可靠性得到较大提升。本文研究可为后续型号可靠性评估与设计提供理论参考。

With the increasing reliability requirements of electronic products,the use of failure physics methods to identify potential weak points in product design has attracted much attention.In this paper,the theory of failure physics and reliability simulation analysis method are used to analyze the reliability of electronic controller.By establishing a digital prototype model of electronic controller,the corresponding stress analysis and fault prediction are conducted to evaluate the mean time to first failure(MTTFF) reliability index of the electronic controller,and optimize the design based on the weak links found in simulation results.It is indicated that the difference between the reliability results and the theoretical calculation results are not significant,and can be used as a basis for evaluating the reliability indicators of models,reducing the cycle and cost of using physical prototypes for reliability testing.At the same time,the optimization and improvement have significantly improved the reliability design of the electronic controller,laying a theoretical foundation for subsequent model reliability evaluation and design.