Active disturbance rejection control design for integrated guidance and control missile based SMC and extended state observer

Abstract

This paper presents an active disturbance rejection rejection control design for integrated guidance and control missile based on sliding mode control and extended state observer. The integrated model is formulated as a block-strict-feedback nonlinear system, in which modeling errors, unmodeled non-linearities, target maneuvers, etc. are viewed as unknown uncertainties. The nonlinear control law is designed based on backstepping and sliding mode control (SMC) techniques. Based on the principle of active disturbance rejection control (ADRC), enhanced feedback linearization (FL) based control law is implemented for the IGC model using the estimates generated by an extended state observer (ESO). The stability analysis of the closed-loop system is also conducted. Simulation results show that, small miss distances and smooth missile trajectories are achieved, and the system is robust against system uncertainties and external disturbances.