气液联控伺服系统的工作性能分析及试验研究

为从根本上克服常规气压伺服系统的缺点，将液体介质引入到气压伺服系统中，并对气、液进行闭环控制，从而构成了一种气、液复合介质控制系统——气液联控伺服系统．系统应用高速开关阀，用脉宽调制(PWM)的方法进行控制．采用单神经元自适应控制器，根据所建立的状态方程进行了系统的控制仿真，并进行了典型信号的跟踪试验．仿真和试验结果表明，气液联控伺服系统的正弦信号跟踪能力、低速性能均高于常规气压伺服系统，系统可实现无超调定位，且具有较高的位置刚度和精度．

Performance Analysis and Experimental Investigation to Pneumatic-Hydraulic-Combination-Control System

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.