Xu Xiufen,Zhao Keding,Yuan Lipeng
(School of Mechatronic Engineering,Harbin Institute of Technology,Harbin 150001,China)
Abstract:To remedy the disadvantages of conventional pneumatic servo system, pneumatic-hydraulic-combination-control(PHCC)servo system is put forward,where the liquid medium is led into the conventional pneumatic servo system and controlled in closed-loop simultaneously.High-speed on-off valves are used and controlled with pulse width modulation£¨PWM£© in this system£®The system is simulated and tested with typical signal input via a single neuron adaptive controller based on the established state equation£®The results of simulation and experiments show that PHCC system achieves a better tracking performance of typical signals than conventional pneumatic servo system£¬also realizes location without overshoot as well as higher position stiffness and accuracy£®
Keywords:pneumatic hydraulic combination control;nonlinear system;simulation;control