Abstract : this paper deals with the microcomputer detection - control system of relief valve . it is designed to collect information from the valve , show the relevant data and curves , and print them out very quickly 文摘:通过实验，研究了溢流阀性能试验的微机测控系统，利用计算机采集信号和处理数据，能迅速测出和直接打印出试验数据与曲线。
The application of computer - aided test ( cat ) provides a brilliant future for characteristic test of servo valve and the technique . ~ of virtual instruments brings cat into a new developing stage 计算机辅助测试（ cat ）技术的兴起和应用，为电液伺服阀性能测试开辟了良好的发展前景。虚拟仪器技术的出现，使cat技术进入一个崭新的发展阶段。
Lastly , a fault diagnosis method based on virtual instrument for electro - hydraulic servo valve was proposed . the expected results have been obtained by the simulated test on the developed test system 最后在对电液伺服阀性能测试试验研究的基础上，提出了一种基于虚拟仪器的电液伺服阀故障诊断方法，并进行了模拟试验研究，取得了预期效果。
When magnetic fluid is filled into the working gaps of servo - valve torque motor between the armature and cores , it shows a higher saturation magnetization because of the working of the magnetic field inside the gaps 因此,本文提出了采用磁流体改善伺服阀性能的方法,着重研究了磁流体添加到力矩马达工作间隙后,对喷嘴挡板伺服阀动态性能的影响。
As the electric - mechanism converter of the servo valve , torque motor is the key component of the electro - hydraulic servo valve . its output torque characteristic has a significant influence on the performance of servo valve 力矩马达作为液压伺服阀的电? ?机械转换装置,是电液伺服阀的关键元件之一,其输出力矩特性对伺服阀性能具有较大的影响。
The system ' s transfer function is acquired according to the step response curve . the influence of the system ' s pressure balance time affected by the steady and unstable state ' s increasing is discussed , the conclusion has practice meaning 深入客观地探讨了不同的加压速率利加压幅值以及分阶段加压对卸荷阀性能测试系统压力平衡时间的影响，获得了有实践指导意义的结果。
With the development of computer - aided test ( cat ) technique , the test technique of electro - hydraulic servo valve has made a great progress , also gone up to a new high level with the appearance of virtual instruments technique 随着计算机辅助测试( cat )技术的发展，电液伺服阀性能测试技术取得了很大进步，而虚拟仪器技术的出现，更使电液伺服阀性能测试技术达到了一个新的高度。
In chapter 3 , the design of each components of the integrated valve are introduced , which include the design of up and down main valves , pilot valves , single way valve and manual urgent descending valve and the safety valve 第三章完成了集成阀各个功能部件的设计和计算，包括上下行主阀、上下行先导阀、单向阀、安全阀等的设计计算。对决定集成阀性能的关键参数进行了理论分析和探讨。
The identification method is studied and the transfer function of the automobile air brake unloading valve ' s test system is acquired ; the pressure balance time of the test system of the unloading valve is studied by the increasing pressure in different speed and scope 本文主要研究内容是汽车气制动卸荷阀性能测试系统的传递函数的辨识方法及不同的加压方式对系统压力平衡时间的影响并进行了相应的试验验证。
Moreover , it is necessary to make a model that can simulate the operation of the valve because occasionally some factors are inaccessible . in this paper , the fundamentals of the valve been comprehended deeply , the model of the valve is brought forward , such factors as the spring , the material of the magnet core , etc are analyzed in detail using matlab simulink 第三，在深入解析电磁阀工作过程的基础上，为了解决那些在现有条件下难以用试验方法分析的某些因素对电磁阀性能的影响，建立了电磁阀的物理模型，采用matlabsimulink仿真技术对其进行了仿真研究，分析了诸如弹簧刚度、铁芯材料等对电磁阀性能的影响，进一步揭示了电磁阀的工作机理。
