| Electro-hydraulic servo testing system is a closed loop control system for the electrical signaling system and hydraulic control system components. Many other advantages of electro-hydraulic servo testing system set electrical processing system and hydraulic control system. Electro-hydraulic servo testing system with fast response, high precision and high load capacity and other characteristics, in many areas of marine, aviation, machine tools, metal and non-metallic materials and performance testing has been widely used. Multi-channel electro-hydraulic servo control system can coordinate the load in a variety of different real industrial conditions on various test pieces were coordinated multi-point test load, electro-hydraulic servo system can be used to simulate the actual state of industry, multichannel multi-point stretch compression fatigue loading were studied. Electro-hydraulic servo testing system has a very broad space for development.In order to achieve stability of the whole testing system work fast, coordinated multi-channel electro-hydraulic servo loading test communication with the host computer system, lower computer system to be. In today's industrial control field, the traditional serial devices are being widely used in electro-hydraulic servo testing system for communication between the upper and lower computer systems still use more RS-232, RS-485, USB communications. With the rapid development of China's industrialization process, the traditional serial communication transmission distance is short, a small amount of data transmitted, the slow transmission of data and other shortcomings have seriously hampered the development of the contemporary process of industrialization. This paper intends to use a higher transmission speed, the greater the amount of data transmission Ethernet communicate upper and lower computer system.In this paper, the acquisition of existing testing machine Jinan East Testing Technology Co. PCI precision intelligent digital control technology Control card, select the upper and lower computer system on the basis of post-mortem tests Jinan East Technology Co., Ltd. existing electro-hydraulic servo testing system on delivery architecture model, data transmission and instructions via TCP / IP communication protocol suite to achieve, the PC system as a whole test system network controlled servo for each channel, acquisition terminal, communication-based TCP / IP protocol suite ways to implement the entire electro-hydraulic servo testing machine monitoring and control system architecture and integration. The main objective of this project is to achieve the overriding system via TCP / IP communications protocol suite on Ethernet for each channel controller system for distributed management, to achieve the lower computer system, data acquisition and control, while the multi-channel coordinated loading control the study.The main contents are as follows:1?The article first electro-hydraulic servo testing system and the basic status of coordinated multi-channel loading for the relevant exposition, including the development of the industry at home and abroad electro-hydraulic servo test system and multi-channel coordinated loading. Introduces the content Ethernet communication, and in accordance with the testing machine Jinan East Testing Technology Co., Ltd. has electro-hydraulic servo technology achievements made based on TCP / IP communication protocol suite of Ethernet communication method, complete multichannel data acquisition and multi-channel coordinated control.2?The lower-level system in the preparation of the lower system acquisition tester data program, focusing on the introduction of the data stored in a circular buffer data storage technology, test machine force value, displacement, deformation amount storage controller system acquisition values, etc. PC system focuses on the preparation of PC systems applications developed based on user-friendly features of electro-hydraulic servo test system acquisition and control interfaces. The use of user-friendly features of the application interface, real-time display and control of the lower bit data acquisition systems via TCP / IP communication protocol suite.3?The electro-hydraulic servo control method of choice is to control the displacement of fuzzy PID control, and the use of MATLAB simulation software simulation test electro-hydraulic servo system, complete the multi-channel controller system coordination loaded. |
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