摘要：电液伺服阀是电液伺服控制系统中的核心转换元件和功率放大元件，因其具有响应快、控制精度高、使用寿命长等特点广泛应用于各项工业领域，其性能直接影响到整个控制系统的精确性、稳定性以及可靠性。因此，电液伺服阀的性能测试便成了工程中一项必不可少的项目。本文结合电磁阀测试技术和虚拟仪器技术，利用图形化编程软件LabVIEW，编制出一套基于虚拟仪器电液伺服阀测试系统。

本文首先对伺服阀的工作原理和电路原理加以介绍，并以此明确本测试系统的功能要求，主要包括实验信息录入、参数的设置、常规阀实验、高频单动实验和曲线实时显示，然后介绍了本测试系统NI软件和硬件，硬件主要叙述了数据采集设备，软件包括了图形化编程软件LabVIEW和数据采集驱动软件NI-DAQmx，其次再进行软件的编程，介绍了程序的总体架构和组成该架构的各循环以及各循环之间数据流传输方式“队列技术”，详细介绍了各循环内的具体功能。最后对程序进行调试。从而达到本测试系统的要求。

关键词：电液伺服阀；LabVIEW；虚拟仪器技术；数据采集；

Abstract：The electro-hydraulic servo valve is the electro-hydraulic servo control system of  the core switching element and the power amplifying element, because of its fast response, high control precision, long life and other characteristics have been widely used in various industrial fields, its performance directly affects the accuracy of the whole control system, stability and reliability. Therefore, the electrical performance test hydraulic servo valve has become an indispensable project. Combining with the electromagnetic valve testing technology and virtual instrument technology, using graphical programming software LabVIEW, developed a set of virtual instrument based on electro-hydraulic servo valve test system .Firstly, the working principle and circuit principle of servo valve are introduced, then makes the test system functional requirements, including the information input, parameter setting, conventional valve experiment, dynamic experiment and single frequency curve of real-time display, and then introduces the selection of the test system of NI software and hardware, the hardware mainly described the data acquisition card, the software includes a graphical programming software LabVIEW and the data acquisition of NI-DAQmx, and then carries on the programming of the software, introduces the overall architecture of  the program and component of the architecture by cycles and the transmission cycle queue technology with data flow between the ring. Introduces the specific function of each cycle. At the end of the program. In order to achieve the test system requirements.

Key words: electro-hydraulic servo valve; LabVIEW; virtual instrument technology; data acquisition;

目录

第一章绪论 1

1.1课题研究的目的和意义 1

1.2电液伺服阀测试系统国内外研究现状和存在的问题 1

1.3虚拟仪器技术的概述 2

1.4本文的主要研究内容 3

第二章测试系统的功能原理 4

2.1伺服阀电气原理 4

2.2测试系统工作原理 4

2.3测试系统的功能要求 5

2.3.1实验信息的录入要求 5

2.3.2常规阀实验要求 7

2.3.3单动实验要求 7

2.3.4实时曲线显示要求