The unmanned aerial vehicles( UAV) has been becoming more and more important in the aviation industry.Despite the superior performance and advanced technology,major accident of UAV happens frequently due to the impact...The unmanned aerial vehicles( UAV) has been becoming more and more important in the aviation industry.Despite the superior performance and advanced technology,major accident of UAV happens frequently due to the impact of their systems,long distance of remote control and skill of manipulator technology.According to the application of engineering application,failure mode effects and criticality analysis( FMECA),failure reporting analysis and corrective action comprehensive analysis systems( FRACAS)and fault tree analysis( FTA)( 3 F) were combined.And also a set of user-friendly,more time,more efficient and accurate reliability analysis system were explored.展开更多
故障模式、影响及危害性分析(Failure Mode,Effects and Criticality Analysis,FMECA)是一种定性、定量分析产品所有可能的故障模式及其影响与危害性的方法。故障树分析(Fault Tree Analysis,FTA)是一种寻找导致顶事件发生的所有原因及...故障模式、影响及危害性分析(Failure Mode,Effects and Criticality Analysis,FMECA)是一种定性、定量分析产品所有可能的故障模式及其影响与危害性的方法。故障树分析(Fault Tree Analysis,FTA)是一种寻找导致顶事件发生的所有原因及其组合,并计算底事件重要度的方法。基于此,通过将FMECA和FTA结合,形成了一套基于FMECA和FTA的可靠性增长方法。采用该方法可不断分析并纠正飞机、系统、设备等在研制、生产、使用、维护等全寿命周期内的缺陷、薄弱环节和故障,从而不断提高产品的可靠性水平,以便于更好地开展产品可靠性增长工作。展开更多
针对电子装备的测试性验证试验中,因电路集成度较高,故障模式可能由一个或多个失效机理引起,利用热失效分析等传统手段已无法有效对电子装备进行深层故障模式分析而导致试验样本可信度降低的问题,提出了基于失效物理(physics of failure...针对电子装备的测试性验证试验中,因电路集成度较高,故障模式可能由一个或多个失效机理引起,利用热失效分析等传统手段已无法有效对电子装备进行深层故障模式分析而导致试验样本可信度降低的问题,提出了基于失效物理(physics of failure,PoF)模型和故障树(fault tree analysis,FTA)相结合的改进故障模式分析方法。以某型电子装备电源模块中过压保护电路为实例,运用失效物理模型从器件级故障模式分析入手,计算出故障率和危害度,得到过压保护电路的FMECA结果,并以故障树分析方法为引导,根据底事件概率重要度与电子元器件危害度定义的相通性,分别将二者优先排序相互比较后验证FMECA结果的正确性,而后按照此类方法层层向上解析,最终得到电子装备正确性高的故障模式分析结果,有效提高了测试性验证试验样本的可信度。展开更多
基金Naional Natural Science Foundntion of China(No.71761030)
文摘The unmanned aerial vehicles( UAV) has been becoming more and more important in the aviation industry.Despite the superior performance and advanced technology,major accident of UAV happens frequently due to the impact of their systems,long distance of remote control and skill of manipulator technology.According to the application of engineering application,failure mode effects and criticality analysis( FMECA),failure reporting analysis and corrective action comprehensive analysis systems( FRACAS)and fault tree analysis( FTA)( 3 F) were combined.And also a set of user-friendly,more time,more efficient and accurate reliability analysis system were explored.
文摘故障模式、影响及危害性分析(Failure Mode,Effects and Criticality Analysis,FMECA)是一种定性、定量分析产品所有可能的故障模式及其影响与危害性的方法。故障树分析(Fault Tree Analysis,FTA)是一种寻找导致顶事件发生的所有原因及其组合,并计算底事件重要度的方法。基于此,通过将FMECA和FTA结合,形成了一套基于FMECA和FTA的可靠性增长方法。采用该方法可不断分析并纠正飞机、系统、设备等在研制、生产、使用、维护等全寿命周期内的缺陷、薄弱环节和故障,从而不断提高产品的可靠性水平,以便于更好地开展产品可靠性增长工作。
文摘针对电子装备的测试性验证试验中,因电路集成度较高,故障模式可能由一个或多个失效机理引起,利用热失效分析等传统手段已无法有效对电子装备进行深层故障模式分析而导致试验样本可信度降低的问题,提出了基于失效物理(physics of failure,PoF)模型和故障树(fault tree analysis,FTA)相结合的改进故障模式分析方法。以某型电子装备电源模块中过压保护电路为实例,运用失效物理模型从器件级故障模式分析入手,计算出故障率和危害度,得到过压保护电路的FMECA结果,并以故障树分析方法为引导,根据底事件概率重要度与电子元器件危害度定义的相通性,分别将二者优先排序相互比较后验证FMECA结果的正确性,而后按照此类方法层层向上解析,最终得到电子装备正确性高的故障模式分析结果,有效提高了测试性验证试验样本的可信度。
