基于故障树分析的数控装置硬件平台功能安全设计与实现  

Design and Implementation of Functional Safety of the Hardware Platform of Domestic Numerical Control Device Based on FTA

作　　者：袁晓慧[1,2] 尹震宇[2,3] 黄祖广[4,5] 王帅华[1,2] 

机构地区：[1]中国科学院大学,北京100049 [2]中国科学院沈阳计算技术研究所总线实验室,沈阳110168 [3]沈阳高精数控技术有限公司,沈阳110168 [4]山东大学机械工程学院,济南250061 [5]国家机床质量监督检测中心,北京100102

出　　处：《组合机床与自动化加工技术》2015年第8期70-73,78,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家科技重大专项课题:高档数控机床与基础制造装备"数控系统功能安全技术研究"(2014ZX04009031)

摘　　要：针对国产数控装置硬件平台安全性能不足且缺乏有效定量评估方法的现状,提出基于故障模式影响诊断分析和简化故障树法的数控装置硬件失效评估模型。通过计算装置硬件失效概率及失效原因重要度分析的结果,对影响装置失效的薄弱模块增加冗余、诊断设计。验证改进后的数控装置硬件平台可达到IEC62061标准中SIL2等级要求,在工程上具有很好的应用价值。Considering the current situation of the hardware platform of domestic numerical control device has an insufficient safety performance and lack of effective quantitative evaluation method, Coming up with a numerical control device hardware platform failure assessment model based on failure model effect diagnostic analysis and simplify fault tree method. After the analysis of computing device hardware failure probability and the importance of failure cause, redundant and diagnose measures are taken for the weak part which causes the platform failure. Experiments verified that the improved numerical control device hardware platform achieved IEC62061 standard and it has a good application value in engineering.

关 键 词：数控装置 功能安全 故障树分析法 IEC62061 安全完整性等级 

分 类 号：TH122[机械工程—机械设计及理论] TG506[金属学及工艺—金属切削加工及机床]