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在电子系统可靠性评价中,目前缺乏的是电子系统电路卡等级以上各级的计算机模型和模拟.CALCEEPRC的PWB级软件已投入使用5年多,而新的组件级软件(微电子封装的计算机辅助设计)正在政府和工业的50多个部门进行β试验.为了预先在组件级评价电子系统的可靠性,由美国国防部模型和模拟办公室投资的一项新的补充软件工具研究项目正在进行中.这一项目由美国陆军、CALCE EPRC和艾奥华大学模拟与设计优化中心(SDO)合作进行。新项目的模型与模拟目标分为三部分的工作:计算电子组件位置上的动态负载;计算通过组件传送到PWB的负载.电子组件本身的可靠性评价.艾奥华大学将负责计算电子组件周围的动态负载与运行记录,CALCE EPRC则负责传送到PWB级的负载信息,并研制评价组件可靠性的新型分析手段.作为这一项目的抽样试验,艾奥华SDO还对高移动性的多功能轮式机车(Vehicle)进行了动态模拟分析。两个选定电子组件周围的动态负载和运行数据要转换到新的组件级可靠性评价软件中.其他环境负载,如温度、湿度、化学杂质和辐射等,则由使用者指定。
In the reliability assessment of electronic systems, computer models and simulations at all levels above the level of the electronic system circuit card are currently lacking.CALCEEPRC’s PWB-level software has been in use for more than five years, and new component-level software (microelectronics-packaged computers Aided design) is beta testing in more than 50 government and industry divisions In order to pre-evaluate the reliability of electronic systems at the component level, a new complementary software tool research project funded by the US Department of Defense model and simulation office is underway The project was conducted by the United States Army, CALCE EPRC and the Iowa University Simulation and Design Optimization Center (SDO). The new project model and simulation goal is divided into three parts: calculating the dynamic load at the location of the electronic component, calculating the load delivered to the PWB by the component, evaluating the reliability of the electronic component itself, and Iowa University will be responsible for calculating the electrical component Of the dynamic load and operating records, CALCE EPRC is responsible for the load to the PWB level of information and to develop new analytical tools to evaluate the reliability of the component as a sampling test of this project, Iowa SDO also highly mobile multi-function The wheel vehicle (Vehicle) conducted a dynamic simulation analysis. Dynamic loads and operating data around the two selected electronic components are transferred to the new component-level reliability evaluation software Other environmental loads, such as temperature, humidity, chemical impurities and radiation, are specified by the user.