激光雷达测量系统故障树分析  

Fault Tree Analysis on measuring system of a laser radar

作　　者：李媛媛[1,2] 李亚洲[1,2] 胡丽琴[1,2] 汪卫华[1,2] 汪建业[1,2] 王世鹏[1,2] 吴宜 FDS团队 

机构地区：[1]中国科学院合肥物质研究院,安徽合肥230031 [2]中国科学技术大学核科学技术学院,安徽合肥230027

出　　处：《红外与激光工程》2009年第2期335-339,共5页Infrared and Laser Engineering

基　　金：中国科学院合肥物质科学研究院院长基金资助项目(075ETY3303)

摘　　要：为了分析并提高用于探测对流层中的水汽和气溶胶含量的激光雷达系统的可靠性,运用故障树分析法建立了系统的故障树模型,采用大型复杂系统可靠性分析软件系统RiskA进行定性分析和定量计算,得到了系统的失效概率,并通过不确定性分析,给出了顶事件的失效概率值在一定置信度内的置信区间。计算了系统底事件的重要度,对其进行了排序,找出了系统易出故障的关键单元并提出了改进措施,为优化系统设计、提高服役周期内的可靠性提供了参考。The Fault Tree Analysis method was proposed to evaluate the reliability of the laser radar system which was mainly used to measure the content of the tropospheric vapor and aerosol. The fault tree model had been constructed to analyze and raise reliability of the system. The qualitative and quantitative analyses had been carried out using self-developed software RiskA which was mainly applied to analyze the reliability of complex systems,and the failure probability of this radar system was obtained. The confidence interval with the stated confidence level was given by uncertainty analysis. The importance of the bottom events were also calculated and ordered. The components which impacted the failure probability of the radar system most were pointed out by the importance analysis. Some advices and references which could be used to optimize the design and improve the system＇s reliability during the operational stage had also been proposed.

关 键 词：激光雷达 可靠性 故障树分析 RiskA 

分 类 号：TN24[电子电信—物理电子学]