Abstract
For the benefit of air pressure, it is used for servo control of pneumatic cylinder. It is necessary to determine quickly the control gain in order to apply the servo control. In previous research, it was known that the dynamics of the servo valve to determine the response of the entire system in the control of the pneumatic system. Therefore, we propose a method for performing position control system design of the cylinder in consideration of the dynamic characteristics of the servo valve, and confirmed the effectiveness. However, this design method is to apply only to the servo valve with a feedback of the valve displacement is not possible. In this paper, we have proposed a design method of a control system based on the stability index for the case of realizing the position control of a pneumatic cylinder with a nozzle flapper type servo valve which does not have the sensors of the valve displacement. When we identified the position control system which is a controlled object and applied the design method of the proposed controller, appropriate response was obtained in the full range of position control, validity of the proposed method was confirmed.
