Accurate Position Control of Pneumatic Actuator Using On/Off Solenoid Valve

Abstract

This paper deals with accurate positioning of pneumatic actuator using solenoid controller to development a fast, accurate, and inexpensive position-controlled that may be applied to a variety of practical positioning applications are described. A Pulse Width Modulation PWM valve pulsing algorithm to allow the on/off solenoid valves to use in the place of costly servo valve. The open-loop characteristic is shown both theoretically and experimentally in near the symmetrical. A comparison of the open- and closed-loop responses of standard PWM techniques and that the PWM technique shows there has been a significant improvement in control. A linear process model is obtained from experimental data using system identification. A intelligent controller of proportional integrative PI controller with position feed forward. A state feedback controller with position, velocity and acceleration feedback as a continuous controller. Proportional integral derivative PID controller with added friction compensation and position controlled pneumatic actuator using Pulse Width Modulation PWM valve pulsing algorithms are described. The system consists a standard double acting cylinder controlled with two three-way solenoid valves through a 12-bit A/D PC board. It is using a non-linear motion of pneumatic actuator to control the plunger positioning it can be analyzed through the displacement or potentiometer sensor.