가변하중을 받는 유압실린더의 제어특성개선

For position control of electro-hydraulic servo system, single rod cylinders and double rod cylinders are used Single rod cylinders have simple structure for manufacturing but different volume ratio of two sides induce to non-linearity in process of then mathematical modeling So only with conventional PID control method it is difficult to control single rod cylinders precisely For more plecise position control of single rod cylinders, a controller which is inserted a velocity feedback PID controller and MRAC contloller are proposed With experiment control performances of three control methods are compared. In case of experiment, for external varying load to the system, a hydraulic cylindel and a pressure control valve are used. In conclusion a MRAC is considered a suitable control method for external varying load