变转速变排量复合调速液压系统监控平台设计

以泵控马达变转速变排量复合容积调速液压系统为研究对象，完成了其监控平台的设计。在介绍系统工作原理及监控平台设计思路的基础上，结合LabVIEW技术，完成了监控平台软件开发。运行结果表明：该平台对模拟量数据及串口数据进行统一采集、保存及处理，并通过变转速、变排量方式实现泵控马达液压系统的无级调速，以及通过调节比例溢流阀实现电液负载模拟加载。监控平台人机界面友好，运行可靠，具有良好的开放性和可扩展性，能更好地满足液压系统动态参数监测和自动控制的需要。

Design of Supervisory Control Platform for Composite Hydraulic Speed Control System with Variable Frequency and Displacement

The supervisory control system for a pump-control-motor composite hydraulic volumetric speed control system with variable frequency and displacement was researched. Based on the full introduction to the working principles about the experimental system and the supervisory control system's structure, the supervisory control platform was implemented with LabVIEW technology. The results indicate that the supervisory control system realizes the acquisition, preservation and processing of the data, including analog data, serial data and so on. At the same time, the control for the speed of hydraulic system was realized by adjusting frequency or variable displacement，and the electro-hydraulic load simulation was achieved by adjusting the proportional relief valve. The supervisory control platform with friendly man-machine interface has a good openness and extensibility,and performs reliably, which is able to meet the needs of dynamic parameter monitoring and automatic control for the hydraulic system better.