随着科学技术的发展，液压传动技术在越来越多的领域得到了广泛的应用，针对液压系统和元件的性能测试工作也越来越频繁。传统的液压综合实验台液压测试技术主要依靠试验操作者手动操作，数据采集方式为：传感器+模拟二次仪表。这种试验方法得到的结果带有严重的人为误差，效率低、精度差，而且试验过程繁琐、分析不便。针对上述情况，本文按照使用方的实际使用要求，参考国家和行业的相关液压试验标准，以双弹车双缸同步系统及其常用典型液压元件为试验对象，设计了一套全新的液压综合试验台系统。 文章从实际的工程项目出发，开展了以下设计和研究工作： (1) 根据用户要求并结合所编写的试验大纲，设计了试验台的液压系统，针对典型的试验回路，分析了其设计思想和工作原理。 (2) 液压综合实验台提出了上位工控机+下位机PLC的分级式控制工作方式，论述了PLC控制系统应用程序的编写思路，采用基于VB环境下的模块化编程方式编写上位机应用软件，为保证试验数据在采集与分析过程中的真实性，系统利用上位机对传感器信号进行了非线性补偿、修正，对特性曲线也进行了必要的拟合处理等。 (3) 为了保证系统的测试精度，文章对液压综合实验台系统的相关性能因素进行了分析与研究：建立了回路上主电液换向阀阀芯运动的动力学方程，和由于该阀芯的动作所导致的液压冲击过程的数学模型，通过对上述数学模型的仿真分析，确立了电液换向阀先导控制压力、主阀芯换向时间、液压冲击三者之间的匹配关系，为不同试验要求下选择不同的先导控制压力提供了理论依据；文章对系统先导式压力调节阀的先导阀芯进行了建模与仿真，分析了在压力冲击下先导阀芯的动态响应特性，论证了系统压力调节过程中良好的压力跟随性能；文章还针对现场调试过程中测得的主变量泵控制电流与流量之间的关系曲线进行了分析，阐述了该系统良好的流量比例连续调节变化特性。 (4) 通过对现场试验过程及结论的分析，表明双弹车同步系统液压综合实验台达到了预期的设计目的，其测试精度达到C级，完全满足用户的使用要求。
With the development of the science and technology, fluid driving is used widely in more and more fields. The function test of hydraulic component is more frequent. The traditional hydraulic technology of test depends on the manual operation, and the way of data collection is sensor and simulation quadric meter. By this means, the factitious error is very serious in conclusion, lower efficiency and precision, and the test process is loaded down with trivial details, not convenient. Aiming at above-mentioned, according to the using demand, referring to interrelated nation and calling hydraulic test criteria, the dissertation designs a set of hydraulic compositive test bed, for the synchronous hydraulic system and the typical hydraulic components of double-bomb transport vehicle as test object.Based on the project of factory, the dissertation will do the design and research as follows:(1) The hydraulic system of test bed is designed according to the using demand and the test outline. Aiming at the typical test circuit, the dissertation analyzes its designing idea and working principle.( 2 ) The dissertation brings forward a grade-pattern automatic control scheme of upper-computer & lower PLC, elaborates the compiling idea of the applied program of PLC control system, adopts programming way of pattern plate to do the applied program of upper computer based on VB. In order to assure the credibility of the test data from sensors in the process of collection and transmission, the sensor signal is compensated non-linearity and modified by upper computer, and the characteristic curve is bedecked.(3 ) In order to assure the test precision of the system, the dissertation goes on analyzing as follows: The paper builds the dynamics model of the valve-core movement and the mathematics model of hydraulic impact resulting from the movement of the valve-core. Through the simulation and analysis, the dissertation sets up the matching relation of precursor control pressure, action time, hydraulic impact, providing theory supporting for choosing difference control pressure under different test require. The dissertation sets up the data model of the precursor core of the pressure valve, analyzes its dynamic response performance under hydraulic impact, proves its good response characteristic. According to analyzing the localABSTRACTtest relation curve about the control electricity and the flow of the variable pump, it proves that the proportion adjusting performance of the variable system is very good.(4) The analysis results for the local test show that the hydraulic compositive test bed of double-bomb transport vehicle attains expected design purpose, and the precision grade attains C.
