Abstract
In this paper, new bang-bang control methods by means of learning law and fuzzy reasoning are proposed for a pneumatic positioning system in which a pneumatically driven brake is built in the cylinder. Two schemes to stop the piston rod are discussed. One is that the piston rod is stopped by brake, and the other is that the piston rod is stopped by chamber pressures. Controllers are designed to determine the bang-bang control inputs, the positions of the piston rod, for switching valves to satisfy the terminal position and the braking condition through analyzing the previous cyclic data. Experimental results show that the proposed controllers possess the capability of obtaining fast convergence of position error, especially for periodic actuations. Owing to ease in implementation, this pneumatic positioning system has been having a prospect in the industrial automation.
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