Comparison of several ESO-based autopilots for flight vehicle

Several extended state observer (ESO) based controllers for flight vehicle are investigated and compared in nominal condition and uncertain condition, respectively. Firstly, the flight vehicle model with parameter uncertainties and external disturbances are presented. And then, the baseline controllers, such as input-output linearization control (IOL), sliding mode control (SMC), and model predictive control (MPC) are proposed. The uncertain parameters and external disturbances are integrated and regarded as the lumped disturbance, which is then estimated by the ESO. Consequently, several ESO-based controllers are investigated and compared with the baseline controllers. The comparison results have validated that the ESO-based controllers are of strong robustness and extraordinary efficiency.