新型比例方向阀动态特性仿真研究  

Simulation of the Dynamic Characteristics for a New Type Proportional Direction Valve

作　　者：王松峰[1] 赵虎[2] 权龙[1] 

机构地区：[1]太原理工大学 新型传感器与智能控制教育部重点实验室,山西太原030024 [2]太原理工大学机械电子工程研究所,山西太原030024

出　　处：《液压气动与密封》2013年第6期35-39,共5页Hydraulics Pneumatics & Seals

基　　金：国家自然科学基金资助项目(51175362)

摘　　要：根据位移-先导流量反馈原理设计出一种新型三位四通比例方向阀,使新阀具有既可闭环控制,又可开环工作的容错控制功能。通过对整阀模型的线性化处理推导出一阶动态数学模型,分析了节流槽面积增益、阀芯面积比和阀口压差对系统转折频率的影响。利用多学科仿真软件SimulationX中的标准元件库和类设计器工具TypeDesigner建立了阀的液压系统模型,分别在时域和频域中对电闭环阀的动态阶跃响应和频率响应特性进行分析,对比仿真了不同阀芯面积比和节流槽面积增益对动特性的影响。研究表明:新的流量反馈型比例方向阀具有较高的闭环响应带宽和能量效率。A novel three-position our-way proportional direction valve is developed based on the displacement-pilot flow feedback principle which enables the new valve can either be controlled under closed-loop condition and has the ability of fault tolerance. Then a first order dynamic mathematical model of the entire valve is derived from the nonlinear analytical model, and the influence of the throttle slot area gain,the spool area ratio and the pressure drop over the valve on the break frequency of the system is analyzed. The hydraulic system model of the valve is established by using the standard component library and TypeDesigner tool in multidisciplinary simulation software--SimulationX, and the step response and frequency response characteristics of this valve is discussed respectively in time domain and frequency domain. Finally, this paper compares the effects under different spool area ratio and throttle slot area gain on dynamic characteristics. The research shows that the new valve with internal flow feedback is of high closed-loop bandwidth and energy efficiency.

关 键 词：流量反馈 开环控制 电闭环控制 动态特性 

分 类 号：TH137.5[机械工程—机械制造及自动化]