逻辑代数在液压系统故障诊断中的应用  

Application of Logic Algebra to Failure Diagnosis of Hydraulic Systems

作　　者：梁升[1] 陈雄[1] 张向前[1] 钱淑华[1] 王新晴[1] 

机构地区：[1]解放军理工大学工程兵工程学院装备维修教研室

出　　处：《工程机械》2007年第12期57-61,共5页Construction Machinery and Equipment

摘　　要：现代挖掘机的液压伺服控制系统越来越复杂,各系统之间多级交叉控制,一旦出现故障,很难理清其控制关系,分析复杂的故障现象与原因之间的对应规律,迅速进行故障定位与隔离。通过将每个液压元件用1个代号表示,根据其状态(故障或良好状态)分别取值"0"或"1",则整个液压系统控制关系就可以通过元件代号之间的"与""、或"、"非"逻辑表达式等价的表达出来。故障诊断的推理过程可以通过若干个"1"和"0"之间的逻辑加和乘运算所替代。推理过程简单明了,检测方案可一目了然。实例证明该方法为复杂伺服液压系统检测方案的确定与故障排除提供了一条重要的途径和实用手段。该方法也可以简便地移植到其它机电液复杂系统的故障检测与诊断中。The servo hydraulic control systems in modern excavators are getting more and more complicated. There are multi-level crossing controls among each other so that once a failure occurs, it is difficult to clear their control relationships, analyze corresponding regularity between complicated failure symptoms and their causes and locate a failure and isolate it promptly. A code name is assigned for every hydraulic unit and valued as 0 or 1 according to its state (failed or normal) so that the control relationships of total hydraulic system can be equivalently demonstrated by 'and', 'or' and 'not' logic expressions among hydraulic unit code names. The inference procedure in failure diagnosis can be replaced by logic addition and multiplication calculation among several '1' and '0'. The inference process is simple and the test scheme is clear at a glance. A practical example verifies that the method provides an important way and measure for test scheme and troubleshooting of complicated servo hydraulic system and can also be transplanted into other mechanical, electro and hydraulic complex systems for failure test and diagnosis.

关 键 词：逻辑表达式 液压系统 故障诊断 

分 类 号：TU621[建筑科学—建筑技术科学]