Composite Flow Regulation and Fuzzy PID Control of Electro-Hydraulic Load Sensitive System with Variable Motor Speed
The composite flow regulation strategy of load sensitive and variable speed was proposed for the servomotor-driven elec-tro-hydraulic variable pump system.The fuzzy PID controller was designed to achieve the load-sensitive control with variable differenti-al pressure through electric control mode.The co-simulation model was established using AMESim-Simulink software,the test platform was built and the test was conducted.The results indicate that the fuzzy PID controller exhibits a faster response speed and smaller over-shoot compared to the PID controller.Additionally,the composite flow regulation strategy enhances the flow regulation range by 36%and reduces the flow overshoot by 20%compared to the single load-sensitive flow regulation.Under the step signal of the main control valve opening,the rise time of full flow(from 7 L/min to 81 L/min)regulation for the composite flow regulation is 0.5 s and the fall time of that is 0.2 s,which are similar to those of the single load-sensitive flow regulation.
万方数据
维普
