| 周其旺，邹树梁*，唐德文，刘永霞，王昆.基于故障树分析法的抓头可靠性仿真分析[J].南华大学学报(自然科学版),2013,27(1):46~53.[ZHOU Qi wang1，ZOU Shu liang2*，TANG De wen1，LIU Yong xia1，WANG Kun1.The Simulation Analysis of Grab Reliability Based on the Fault Tree Analysis[J].Journal of University of South China(Science and Technology),2013,27(1):46~53.] |
| 基于故障树分析法的抓头可靠性仿真分析 |
| The Simulation Analysis of Grab Reliability Based on the Fault Tree Analysis |
| 投稿时间：2012-11-09 |
| DOI： |
| 中文关键词: 故障树分析 抓头 CAFTA 可靠性 |
| 英文关键词:fault tree analysis grab CAFTA reliability |
| 基金项目:国防基础科研基金资助项目(2011GHN02-Z03) |
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| 中文摘要: |
| 首先采用故障树法对送料系统中的抓头部件进行结构功能分析，建立可靠性框图，并以“抓料失效”为顶事件，建立故障树并得到了抓头的最小割集和最小径集；经过重要度分析，找出了关键零部件并分析了故障原因，然后结合计算机辅助故障树分析软件（CAFTA）对其进行仿真模拟，计算得到抓头的可靠度直方图，并确立抓头的失效服从指数分布.针对抓头最小割集中的关键部件提出了抓头护板表面改性和结构设计改进措施，实验表明原故障基本消除，系统的可靠性得到较大提高. |
| 英文摘要: |
| A fault tree method was used to analyse the grab's structure and the function of feeding system and the reliability block diagram was presented.Take the grasping failure as top event，the minimum cut sets and minimal path sets were given out and the fault tree was established in the paper.The key parts and cause of the malfunction were found out after the importance analysis of the grab.Emulational simulation was performed with CAFTA，and then the reliability histogram was given out through calculation，and the grab failure was confirmed to be exponentially distributed.According to the key parts of minimal cut sets，this paper proposes improvement measures based on surface modification and structure design.The consequence of the experiment showed that fault was basically eliminated and reliability of the system was greatly improved. |
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