PLC对油泵和电液阀的闭环控制达到精确发油。
通过对电液阀结构与工作原理的分析，导出了电液阀的p—I（压力—控制电流）特性方程式。
The structure and the working principle of electronic-hydraulic valve are analysed and the P-I (Pressure-Control current)characteristic equation of electronic-hydraulic valve is derived.
输油泵采用变频器进行调控并结合电液阀的多段控制，避免输油管路产生水击，提高了输油作业的工作效率和安全性。
The frequency converter for oil transfer pump and multistage control for electrohydraulic valve are used to prevent water hammer in oil pipe, and improve the efficiency and safety in oil transmission.
本文以数字阀、插装阀并联电液系统为例，分析了智能时间次优控制方法。
Concerning for the electrohydraulic system with digital valve and cartridge valve, this paper analyzes the intelligent time suboptimal control.
电液比例控制阀使用的证明力反馈改善滞后性，重复性系统和响应。
The electro-hydraulic proportional control valve uses the proven force feed-back system for improved hysteresis, repeatability, and response.
一种基于PLC的电液自动控制系统，采用了电液比例阀的双闭环控制系统。
This paper introduces an electrohydraulic control system based on PLC. A double close - loop control system with electro - hydraulic proportional valve is adopted.
因此，抗污染能力成为电液伺服阀的重要指标。
So, the ability of antipollution becomes the important performance of electrohydraulic servo valve.
介绍的新型电液数字溢流阀是一种数字信息直接控制的导控式压力控制元件。
A new type of electro hydraulic digital relief valve, which is a pilot pressure control component directly controlled by digital information is introduced.
阐述了电液先导控制阀组的控制原理和结构特点，介绍了先导阀组的试验原理和步骤。
The control concepts and configuration characteristic are detailed, as well the experiment principle and process of the pilot valves are introduced.
介绍了电液伺服阀性能测试试验台的改造方案。
The test bedstand innovation scheme of the electrohydraulic servo valve performances is presented.
在电液比例流量阀中，本文采用了以单片机c 8051f 320为核心的控制技术。
This paper adopts the control technology of single chip C8051F320 core in electronic-hydraulic proportional flow valve.
利用EASY5仿真软件对组合阀组成的电液比例位置闭环系统进行动态建模仿真分析，为实验提供了控制参数。
By the use of software EASY5, the electro-hydraulic proportional system of position close-loop is modeled and simulated, which provided the controlling parameters for experiment.
系统的控制信号输入方式借鉴电液比例阀方案，采用凸轮杠杆机构，从而利用了凸轮容易实现任意函数关系转换的优点。
Imitating the project of electrical and hydraulic proportional valve, a CAM mechanism is adopted to input and convert the signal of crane arm's radius changing.
依据实际工况，设计了一种模糊自适应PID控制器来控制电液比例调速阀阀口的开口量，实现系统的安全、平稳制动。
According to actual conditions, design a fuzzy adaptive PID controller to control the openings of the electro-hydraulic proportional valve port, implementing a safe and smooth braking.
直线力电机是直线电机的一种，主要是作为执行器应用于电液伺服阀等位置伺服或开关量控制系统。
As a kind of linear motor, linear force motor usually is used as an actuator in positioning or switching control system for hydrometric servo valves and so on.
介绍了一种直动式电液数字伺服阀的结构原理及其控制方法。
The operation principle and control method of electro-hydraulic digital servo valve are first introduced.
给出了一种新型电液数字换向阀。
电液伺服阀的功率级一般为滑阀，起液压放大器的作用。
The power stage of servovalves is spool valve, playing the role of hydraulic pressure amplifier.
提出了一种新型压电晶片型喷嘴挡板式电液伺服阀，并对其控制方法进行了研究。
A novel piezoelectric type nozzle flapper hydroelectric servo valve was developed and its control method was researched.
由电液比例换向阀和轴向变量泵组成的比例变量泵系统是一种新型液压动力机构。
The proportional variable pump system made up with electrohydraulic proportional reversing valve and axial variable pump is a new kind of hydraulic dynamic structure.
伺服阀主要分为力反馈式电液伺服阀和位置反馈式伺服阀。
Servo valves consists of feedback - electric-hydraulic servo valve and position feedback servo valves.
研制了一种全新结构的直接驱动电液伺服阀。
This paper develops a direct-drive electrohydraulic servo valve of a completely new structure.
通过对电液比例多路阀进行负载敏感控制，实现泵和负载之间的功率匹配，显著提高系统效率。
Electro-hydraulic proportional sectional valves are realized with load sensing control, and the pump output power is adaptive to load, the system effectiveness is highly enhanced.
系统中设有流量调节环节，电液比例调速阀在快挡可以缩短整个调平时间，在慢挡可以保证调平精度。
Equipped with flow regulator in system, electro-hydraulic proportional speed regulating valve can decrease leveling time in high speed gear, and ensure leveling accuracy in low speed gear.
电液伺服阀作为产品，在出厂前须进行严格测试。
As a product, before the servo valve leaves factory, it should be tested strictly.
在大型构件液压同步提升技术中，采用了计算机输出的脉宽调制信号作为电液比例流量阀的输入电流信号控制液压提升器的速度。
In hydraulic synchronizing lifting technology for oversize structure, computer output PWM signal as the input current of proportional valve is used to control the velocity of hydraulic cylinder.
本文介绍电液伺服阀频率特性的压差式测试原理及频率特性测试仪的硬软件结构、原理及特点。
This paper presents the principle, hardware structure, and features of a frequency characteristics instrument for electro-hydraulic servo valves.
本文提出了电液比例方向阀死区的一种智能补偿方法。
This paper puts forward the method of intelligent compensation of dead zone in electrohydraulic proportional directional valve.
与传统伺服阀相比，以新型功能材料为电-机械转换器的电液伺服阀，具有高频响、高精度和易于微型化等优点。
The electro-hydraulic servo valves in which some novel functional materials are applied to the actuators can have high frequency response and high precision and can be made by micromation.
提出利用开关电磁铁构成单电磁铁式电液比例伺服阀的方案。
A new scheme for electrohydraulic proportional servo valves with switching solenoids was presented.
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