差動PWM法による電気・油圧サーボ系のディジタル制御

概要

論文の詳細を見る
In the preceding papers, the authors proposed a new method of differential PWM for a hydraulic actuator operated by two 3-way solenoid valves. An arbitary pulse width of the pressure difference across both sides of the actuator piston was realized by adjusting the switching time of each valve. The actuator operated by differential PWM shows good linearity as a control element, achieving accurate positioning. This study, as the application, deals with a hydraulic servosystem composed of a 4-way spool valve and a load cylinder, where the spool valve is driven directly by the differential PWM actuator. The servosystem is designed by the optimal regulator method of the state variable model. The system performance is investigated by simulations and experiments. Consequently, it proves that the actuator, operated by differential PWM, plays the role of a linear control element, and the servosystem is well designed by the optimal regulator.
社団法人日本機械学会の論文
1991-05-25