Research on Attitude Control Technology of Aircraft Based on Extended State Observer

Abstract

In this paper, an extended state observer (ESO) is established for the linear model of aircraft with small disturbance, considering wind disturbance, structural disturbance, model uncertainty and measurement noise. The real-time estimation and compensation of the system state are carried out. The nonlinear feedback control law is designed to complete the design of aircraft attitude controller. The simulation results show that the attitude controller with extended state observer and nonlinear control law has better control quality than the traditional attitude control correction network method. In the case of large unknown measurement noise, the system has better filtering characteristics and robustness.KeywordsSmall disturbance linearizationExtended state observerNonlinear feedback control lawRobustness