基于LabVIEW的电液伺服阀性能测试试验台的优化设计与研究

发布时间：2018-01-07 01:20

本文关键词：基于LabVIEW的电液伺服阀性能测试试验台的优化设计与研究　出处：《东北大学》2012年硕士论文　论文类型：学位论文

【摘要】：电液伺服阀是电液伺服控制系统中的关键元件,其良好的性能指标对于保证电液伺服系统准确、快速、稳定的工作有重要的意义。本文在东北大学液压与气动实验室原有电液伺服阀性能试验台的基础上,对试验台原理以及硬件进行优化设计。引入液压CAT技术,将只能进行伺服阀动态特性测试的试验台升级改造后,成为既能够进行静态特性测试又能完成动态特性测试的试验台。完善了试验台的测试功能。本论文主要内容为： (1)对电液伺服阀的动静态性能分析,以及对实验室原有SY02电液伺服阀性能试验台进行深入分析,充分利用实验室原有资源。引入比例节流阀,实现负载压力特性测试时自动加载；使用油冷机代替水冷却器,提高油温控制的精确度,减小油温变化所带来的试验误差；重新设计油箱、阀块等对试验台液压系统进行优化设计,使试验台具备伺服阀动静态性能测试的硬件基础。 (2)根据测试方案,对液压CAT系统进行硬件设计,合理选择元器件(工控机、数据采集卡、传感器、PLC等)。同时根据现场设备环境,对电气设备如电控柜、操作台进行设计。利用接地技术与屏蔽技术实现测试系统的抗干扰设计。 (3)上位机利用LabVIEW虚拟仪器平台实现,下位机选用SIEMENS S7-200系列PLC。通过OPC技术与DataSocket技术实现了PC机与PLC的实时通讯。PLC作为控制系统的核心,实现测试系统的逻辑控制。LabVIEW采用模块化进行测试程序设计,自动实现激励信号的产生输出与试验数据的采集、处理、保存以及曲线输出等功能。结合LabVIEW与PLC各自的特点,发挥各自的优势,开发出一套功能强大、高效可靠及具有良好人机界面的测试系统。测试试验台液压系统的成功搭建后,对液压系统进行了调试分析,证明液压系统满足测试要求；对测试程序进行模拟分析表明满足伺服阀动、静态特性测试要求。证明上述设计的可行性。
[Abstract]:The electro-hydraulic servo valve is the key component of the electro-hydraulic servo control system, its good performance for the electro-hydraulic servo system is accurate, fast, stable work has important significance. This paper based dynamic original laboratory electrohydraulic servo valve performance test bench in Northeastern University of hydraulic and gas, the test principle and hardware to optimize the design. Introduction of hydraulic CAT technology, will only test the dynamic characteristics of servo valve testing after the upgrade, as can be static characteristics test and finish the test bench for testing the dynamic characteristics. To improve the test function test. The main contents of this paper are:
(1) analysis of the electro-hydraulic servo valve static and dynamic performance, and in-depth analysis of the original laboratory SY02 electrohydraulic servo valve performance test platform, make full use of laboratory resources. The original introduction of proportional throttle valve, automatic loading load pressure characteristics test; the use of oil cooler for water cooler, improve the temperature control precision. Test error caused decrease of temperature; re design the tank, optimize the design of the valve block of hydraulic system, the test platform with hardware based static and dynamic performance test of servo valve.
(2) according to the test plan, the hardware design of the hydraulic CAT system, a reasonable choice of components (IPC, data acquisition card, PLC sensor, etc.). At the same time according to the field of electrical equipment such as equipment, electric control cabinet, operation table design. By using the technology of grounding and shielding technology to realize the anti-jamming design of the test system.
(3) computer using LabVIEW virtual instrument platform, the lower computer adopts SIEMENS S7-200 series PLC. by OPC technology and DataSocket technology to achieve the real-time communication of.PLC PC and PLC as the core of the control system, the test system of logic control.LabVIEW test program design is modular, automatically generating excitation signal and output the test data acquisition, processing, storage and output curve functions. Combined with the characteristics of LabVIEW and PLC respectively, play their respective advantages, develop a set of powerful, efficient and reliable testing system has good man-machine interface.
After the successful establishment of the hydraulic system of the test stand, the hydraulic system is debugged and analyzed. It is proved that the hydraulic system meets the test requirements. The simulation analysis of the test program shows that the test requirements of the servo valve's dynamic and static characteristics are satisfied, which proves the feasibility of the above design.

【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.5

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