Research on Electro-Hydraulic Position Servo Systems with Low-Order Active Disturbance Rejection Control
The electro-hydraulic position servo system is a time-varying non-linear,unknown external dis-turbance and complex mathematical model of high-order systems,for which the high-order ADRC method requires more rectification parameters and a complex model structure,which is difficult to implement in practical engineering applications.To address this problem,the first-and second-order ADRC performance of electro-hydraulic position servo systems is investigated to achieve low-order ADRC of electro-hydraulic position servo systems.The low-order ADRC system of the electro-hydraulic position servo system is estab-lished based on Simulink,given step and sinusoidal signal commands,and a load disturbance force is ap-plied to the system to analyze the response speed,accuracy and immunity of the system.The results show that both first-order and second-order ADRC can bring the electro-hydraulic position servo system to a steady state,and the second-order non-linear ADRC system has a faster response,higher control accuracy and greater robustness.
electro-hydraulic position servo systemnonlinear active disturbance rejection controllinear active disturbance rejection controlphysical model