3103 サーボ弁の動特性を考慮した空気圧サーボシステムの制御系設計(S45-1 フルードパワー機器 I,S45 フルードパワー機器)  [in Japanese] 3103 Control System Design of Pneumatic Servo System Considering Dynamic Characteristics of Servo Valve  [in Japanese]

In the control synthesis, the transfer function of a pneumatic servo system has been a 3rd order time lag system, based on the assumption that a servo valve dynamics is negligible because it is enough faster than a cylinder drive dynamics. However, the characteristic of a servo valve has influenced the whole dynamic characteristic greatly, and should be taken into account in the control synthesis. In this research, a new method on the control synthesis, which deals with the pneumatic servo system as a 5th order time lag system including a 2nd order time lag system of a servo valve, has been proposed. The proposed method is tested in the simulation and the experiments. Consequently, the loop gain can be bigger, so that the performance of a pneumatic servo has been improved.