A PWM Position Control System of Cylinder with a Built in Brake

Aim To present a new kind of pneumatic position control system based on the analysis of the disadvantages of conventional pneumatic position control systems. Methods The new kind of pneumatic position control system used a new kind of actuator cylinder with a built in brake and a displacement sensor. And PWM control method and fuzzy control algorithm were utilized in the system to control the position of the cylinder, and the brake was used to fix the cylinder to its target position after it reached the position.Results The stiffness of the system was experimentally proved to be greatly improved and the position precision to be within 0 15 mm. In addition, the system is free of great shock and wear. Conclusions The new kind of pneumatic position control system is free of the disadvantages of conventional systems, and is of practical value.