The Electro-Hydraulic Servomechanism Based on State Feedback Self-correction Controller

When an asymmetric cylinder is used in an electro-hydraulic servomechanism. The characteristics of the piston velocity are not symmetrical. In this research an rver was designed. This observer which uses control force and velocity of the piston can guess an asymmetric driving force of this system. Then this observer composes a feedback loop in servomechanism. The objective of this research is as follows: 1. Getting the same velochar-acteristics as that in a mechanism with a symmetric cylinder. 2. Explaining how to design the observer and the results of compensation of asymmetrization.