液压动力系统电液参数耦合机理研究  

Research on the Coupling Mechanism of Electro-hydraulic Parameters for Hydraulic Power System

作　　者：孙昱[1] 谷立臣[1] 陈江城[1] 

机构地区：[1]西安建筑科技大学,西安710055

出　　处：《机械科学与技术》2012年第10期1706-1710,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(50575168);陕西省工业攻关项目(2008K05-04);陕西省教育厅项目(08JC10)资助

摘　　要：利用功率键合图的方法,从能量转换的角度分析了液压动力系统电液参数的耦合机理,并且推导了稳态运行时系统压力与动力源电流的数学关系,理论上说明在动力源电流信号中蕴含了液压系统压力变化信息,从而得出通过非嵌入式的电流信号的监测可获得液压系统的运行状态信息。在此基础上,利用MatlabSimscape对本文研究的液压动力系统试验台进行建模和冲击工况的仿真,同时进行相应可靠试验,仿真结果和实验数据均验证了理论分析的正确性,进一步证明了利用电流信号反映液压系统运行工况的可行性。From the view point of energy conversion, the electro-hydraulic parameters coupling mechanism was analyzed based on the Power Bond Graph method. The mathematical relationship between the pressure and current of the system on a steady operation condition was deduced, which showed that the current of power source contains the pressure change information of the hydraulic system, finally, the conclusion that the running state of hydraulic power system can be deter- mined by non-embedded measurement of the current was put forward. Based on the above, the simulation model of the hydraulic power system studied in the paper was set-up and the simulation figures of the impact condition is given, the corresponding experiments were conducted. The simulation results and the test date agree well and it proves that that the running condition can be recognized by monitoring the current signal.

关 键 词：液压动力系统 电液参数 耦合 MatlabSimscape 

分 类 号：TH137[机械工程—机械制造及自动化]