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| Design of embedded electro-hydraulic servo synchronous system |
| Wang Hongjie1, He Xiaolin1, Li Deyou1, Zhao Junlong1, Li Zheng1, 2 |
| 1.School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China; 2.Harbin Institute of Large Electric Machinery, Harbin, Heilongjiang 150001, China |
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Abstract Reasonable control method and high-performance measurement and control system can effectively enhance the synchronization accuracy of electro-hydraulic servo system, which is of great significance for improving the performance of cylindrical valve and governor of a turbine. Considering the characteristics of synchronous multi-loop system, an improved control method was proposed to add controller to each circuit for signal pre-processing. The measurement and control system is based on PXIe embedded platform, combining the advantage of embedded R-T controller and synchronization data acquisition card to gain efficient control over the system and the software employed by LabVIEW is responsible for data collecting and processing. Preliminary test was made on the two-cylinder synchronous system. The results show that this hydraulic system works well and achieves the design requirement. System′s synchronous errors reduce from 0.40 mm to 0.15 mm and meet the requirement. The design reflects that embedded system is superior in the control of synchronous system as its high speed and reliability, it can effectively improve the control accuracy of the cylinder valve and speed governor.
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Received: 21 January 2013
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