基于振动的液压传动系统状态监测方法研究  

Research about HTS Condition Monitoring Method Based on Vibration Measurement

作　　者：任丽华[1] 原立涛 

机构地区：[1]宁波大红鹰职业技术学院软件学院,浙江宁波315175 [2]黑龙江科技学院,哈尔滨150027

出　　处：《煤矿机械》2007年第9期193-195,共3页Coal Mine Machinery

摘　　要：对液压传动系统进行状态监测,可以保证和提高液压传动系统可靠性,而液压传动系统的故障往往经历一个从产生到发展、从轻微到严重的渐变过程,因此尽早识别轻微故障,对于提高液压系统的安全性具有重要的意义。如支持向量机可以在这个领域能发挥很重要的作用。研究了基于振动的液压传动系统的状态监测方法,利用支持向量机(Support Vector Machine,简称SVM)获得各个样本的后验概率信息,然后通过引入损失函数,使诊断决策的平均损失达到最小。模拟液压泵故障实验证明了该方法的有效性。The reliability of hydraulic transmission system（HTS） can be ensured by the condition monitoring. Because the fault of HTS is always a gradual process from slight to serious, it is very significant to identify the slight fault, which is very important to improve the safety of HTS. SVM plays an important role in this field. A HTS condition monitoring method based on vibration measurement is presented. Firstly, the posterior proba- bility is obtained by the use of support vector machine. Secondly, the risk function is introduced to minimize the average risk of diagnosis. The experiment of the hydraulic pump fault proved the validity of this methtod.

关 键 词：液压传动系统 支持向量机 状态监测 损失函数 

分 类 号：TH135[机械工程—机械制造及自动化] TP137.9[自动化与计算机技术—控制理论与控制工程]