Optimal Design of Monitoring Point of Multi-load-sensing Hydraulic System Based on the Maximum Fault Diagnosis Information Criterion

Abstract

Abstract:

The monitoring points of the forklift multi-load-sensing hydraulic system were analyzed herein,and the test signals digraph and the relational model of “components-monitoring points” were built. Then, maximum fault diagnosis information criterion could be established by means of the concept of entropy in information theory, to confirm the optimal fault diagnosis strategy that comprehensively evaluated the most fault diagnosis information entropy with smaller cost and test time. Based on this criterion, the monitoring points of the multi-load-sensing hydraulic system were optimized, and the fault diagnosis isolated was drawn tree by step-test method finally.

Key words: fault diagnosis information criterion, monitoring point, optimal design, multi-load-sensing hydraulic system

摘要：

对特种叉车多负荷传感液压系统的监测点进行分析,建立了多负荷传感系统的测试信号有向图和“元部件-监测点”相关性模型。利用信息论中熵的概念,综合评判最大故障诊断信息熵、较短测试时间和较低测试成本以实现故障诊断,建立了最大故障诊断信息量准则,并以此准则对多负荷传感液压系统状态监测点进行优化设计。最后采用分步测试方式画出特种叉车液压系统故障诊断隔离树。

关键词: 故障诊断信息量准则, 监测点, 优化设计, 多负荷传感液压系统

CLC Number:

TH17

Guo Haoliang, Mu Xihui, Du Fengpo, Chen Jianhua. Optimal Design of Monitoring Point of Multi-load-sensing Hydraulic System Based on the Maximum Fault Diagnosis Information Criterion[J]. China Mechanical Engineering, 2014, 25(11): 1502-1506.

郭浩亮, 穆希辉, 杜峰坡, 陈建华. 基于最大故障诊断信息量准则的多负荷传感液压系统监测点优化设计[J]. 中国机械工程, 2014, 25(11): 1502-1506.

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