This paper discusses the theoretical and experimental results of a position control system using a pneumatic actuator driven by fast switching on/off valves. To begin with, there is a brief introduction about servo-pneumatic systems driven by fast switching valves. Subsequently, the mathematical model of the servo-pneumatic system is discussed involving directional fast switching on/off valves and the flow control valves, modeled according to the mass flow equation based on ISO 6358 and the actuator modeled by Newton’s second law and the continuity equation. The system control is performed through the pulse width modulation (PWM) technique used with a proportional-integrative-derivative (PID) controller. The system performance is analyzed in relation to its application for power control of wind turbines. The simulations of the servo-pneumatic system were carried out by Matlab/Simulink with the experimental results obtained through a test bench.

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