The Fuzzy Control System Of Hose Pulse Experiment Based On LabVIEW

The electro-hydraulic servo system is generally used in the hose pulse testing bench. It occupies little space, tracks signals fast and has sample structure. And it is widely used in industrial control field. However, there are lots of problems such as little accuracy, lagging serious and obvious drift on the conventional hydraulic system. These problems are caused by slow response of hydraulic and out-sync converting between electronic and hydraulic. In recent years, these problems has been partly alleviated by the improved PID control. But some problems like high order and parameters varying are still existed in the system.According to the special requirements of the control system, a PID method based on fuzzy control is sprayed in the paper.The design and research of hydraulic servo pulse testing machine is described in the paper, and it mainly includes the hardware design of hydraulic servo system, circuit design of electrical control system and PC-based software design. It introduces fuzzy control methods to optimized the control system of hydraulic servo pulse test bench and highlights the fuzzy control method, the design and comparison of hydraulic scheme and servo control technology.In the paper, the calculation and selection of hydraulic components, the design of electrical control scheme and the design of monitoring system based on LabVIEW are all explained. The test system of hydraulic impulse is designed and improved. The tests of water hammer wave(28-42Mpa) and trapezoidal wave(23MPa and 42MPa) are successfully completed in China Aero-poly Technology Establishment in Beijing. The experimental results shows that the problems like instability and parameters time-varying are resolved in the new system.