Application of a New Algorithm to Pneumatic Servo Valve

Aiming at the structure and working principle of single-stage pneumatic servo valve (SPSV) driven directly by voice coil actuator,a digital control algorithm is proposed to achieve high frequency,high-precision flow control.The algorithm is composed of a calculation delay compensator and an interference observer.Research experiments show that the new pneumatic servo valve based on digital control is better than the traditional nozzle-baffle type 2 pneumatic servo valve in its dynamic nature and precision control.The natural frequency of the valve can reach up to 300 Hz.