| Hydraulic support electro-hydraulic control system(HSEHCS) is the core device to realize automatic control of hydraulic support. But both imported and home-manufactured HSEHCS have problems in scalability, function and communication. A new kind of HSEHCS was designed.In order to test the performance of HSEHCS, a test platform for the HSEHCS was designed and built. Hydraulic support simulation system of the test platform was designed. Measurement and control system of the test platform was developed, and the pressure control strategy of leg cylinder was investigated emphatically. Finally, a performance test of HSEHCS was carried out on the test platform. The main research work and new ideas are summarized as follows:(1) Overall architecture of HSEHCS test platform and the hydraulic support simulation system was designed. Model selection of hydraulic system module, electrical system module and proportion simulation system module was carried out detailedly. Different types of hydraulic support can be simulated with the designed test platform by adjusting the pressure and stretch speed of the hydraulic cylinder through electro-hydraulic proportional valve. It could provide real sensor signals for HSEHCS so as to simulate the real working condition of hydraulic support.(2) Pressure control strategy of leg cylinder was researched. In order to provide authentic pressure sensor signal of hydraulic support leg for HSEHCS, four kinds of pressure control strategy were designed based on conventional PID control, fuzzy control, fuzzy PID control and parameter self-tuning fuzzy PID control, respectively. Simulation models of four controllers were set up and an analysis was carried out in Simulink. Simulation results turned out that the parameter self-tuning fuzzy PID controller could get the best steady state and dynamic response characteristics.(3) Measurement and control system of the test platform was developed. The overall architecture of measurement and control system was designed. Model selection of PLC module and programming was carried out. Multi-function hydraulic power and hydraulic support simulation system could be monitored and controlled by the human-machine interface of the test platform which was developed in Win CC. Parameter self-tuning fuzzy PID controller was used in the human-machine interface through dynamic link library.(4) Performance test of the designed HSEHCS was carried out on the test platform. Experiment turned out that pressure control strategy based on parameter self-tuning fuzzy PID control was superior to others. The HSEHCS has made a good contribution in improving the performance of HSEHCS. |
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