Study on Missile Electro-hydraulic Actuator System Based on Active Disturbance Rejection Control Method

Aiming at the high nonlinear and time-varying parameters characters of missile electro-hydraulic actuator servo system,the model of actuator system was established firstly,in which diverse rudder load and uncertain external disturbance were regarded as one integrated total disturbance.Using extended states observer(ESO),a new observer was proposed to observe and compensate the total disturbance,so a novel controller without an explicit mathematical model was designed based on active disturbance rejection control(ADRC).The designed controller not only satisfies the rapid and steady-state accuracy demands,but also effectively resists to the change of the rudder load and external disturbance.Simulation results show that ADRC controller studied in this paper has stronger robustness and adaptability,and demonstrate the feasibility and effectiveness of proposed method.