A Design Method of Missile Acceleration Autopilot Based on Active Disturbance Rejection Control

Abstract

Abstract In order to solve the problem that the performance of the traditional two-loop acceleration autopilot is relatively large affected by the missile aerodynamic, an improved design method based on active disturbance rejection control (ADRC) is proposed. The ADRC acceleration autopilot adopts the extended state observer (ESO) to estimate the disturbance and eliminate the impact of the model uncertainties and external disturbances, which achieve good interference suppression and accurate tracking of command. Then the pole placement method is used for the ADRC autopilot parameter design. Finally, the ADRC autopilot is compared to traditional two-loop autopilot and two-loop autopilot with PI correction under parameters uncertainty and external disturbance, the simulation results demonstrate that the impact of these two factors on the performance of the ADRC autopilot is relatively small. Therefore, the ADRC autopilot is proved to have fast response speed, good transient process, strong anti-interference ability and robustness.