Auto-coupling PID control of electro-hydraulic servo system
For the third order electro-hydraulic servo system with high nonlinear and parameter uncertainty,an Extended Auto-Coupling PD control method based on the Auto-Coupling PID control theory is proposed.By defining the internal dynamics and external uncertainties of the electro-hydraulic servo system as total disturbances,the third-order nonlinear system is equivalently mapped to a third-order linear disturbance system,forming a controlled error system under total disturbance excitation.Based on the adaptive speed factor,an extended Auto-Coupling PD controller is designed,and theoretical analysis shows that the extended Auto-Coupling PD closed-loop control system has good robust stability and disturbance resistance robustness.The simulation results show that the proposed control method not only has high dynamic response speed,but also high steady-state control precision,so it has a good practical application prospect in the field of electro-hydraulic servo system.
electro-hydraulic servoextended auto-coupling PDthird order nonlinear systemtotal disturbanceadaptive speed
万方数据
维普
