| Title |
Design of a Controller for Nonlinear Electrohydraulic Position Control Systems |
| Keywords |
쿨롱 마찰 ; 비선형 전기유압시스템 ; 리미트싸이클 ; 위치제어 ; 기술함수법 Coulomb Friction ; Nonlinear Electrohydraulic System ; Limit Cycle ; Postion Control ; Describing Function Method |
| Abstract |
A tracking controller which can improve the performance of nonlinear electrohydraulic position control system is designed and implemented. The method is based on augmenting the system with integrators, obtaining the feedback control law which stabilizes the linear part of the original nonlinear system, and then reajusting the feedback gains using the deseribing funtion method to eliminate the limit cycle in the steady state. The proposed control law is implemented using OP amplifiers, and step and ramp response tests are carried out in the electrohydraulic servomechanism. The results show the improvement in both rransient and steady-state response. |