Hybrid Method of Computer Aided FMECA and FTA
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摘要: FMECA(Failure Mode Effect and Criticality Analysis)和FTA(Fault Tree Analysis)是分析系统故障因果关系的两种常用技术.大量工程实践表明,它们在用于系统安全性、可靠性分析时取得了显著的效益.这两种技术分别独立应用时,既有各自的优点,也存在着一定的缺陷和不足,为此综合了FMECA与FTA的优点,阐述了复杂动态系统FMECA与FTA综合的思路,着重阐述了由计算机辅助FMECA向FTA正向综合建立故障子树的推理算法,通过三余度舵机系统的应用,证明该方法效果良好.
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关键词:
- 故障树形图分析 /
- 综合定位法 /
- 可靠性 /
- FMECA与FTA正向综合分析方法
Abstract: Fault Tree Analysis (FTA) is an affective method from top to bottom, which can evaluate system reliability and safety. Failure Mode Effect and Criticality Analysis (FMECA) is a quantity reliability analysis from down to top. This paper combines the disadvantage between FTA and FMECA, finds the joints between FMECA and FTA of complex system. Before the joints, this paper presented the automatic transform algebra between the FMECA and FTA of sub fault tree, otherwise the computer aided dynamic fault tree method is established after the joints. The application of tree redundancy actuator of this method is content.-
Key words:
- fault tree analysis /
- combined method /
- reliability /
- hybrid method of FMECA and FTA
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[1] 王少萍. 工程可靠性[M]. 北京:北京航空航天大学出版社,2000. [2]Josef B J, Baai V. Hardware/software FMEA applied to airplane safety . 1985 Proceedings Annual Reliability and Maintainability Symposium . Mechanical Industry Press, 1985,250~254. [3]郝春萍,舵机可靠性分析和软硬件综合系统FMECA方法研究 .北京航空航天大学自动控制系,1997. [4]Price C J, Taylor N S. FMEA for multiple failures .1998 Proceeding Annual Reliability and Maintainability Symposium .Shanghai:Publication Press,1998. 43~47. [5]简志敏.控制系统故障树自动建造的一种新方法 .清华大学精密仪器系,1995. -
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