Nonlinear Disturbance Observer Based Fuel-consumption Optimal Control for Airbreathing Hypersonic Vehicles

摘要

This paper focuses on the fuel consumption optimization problem of AHV longitudinal dynamics influenced by mismatched disturbances caused by model uncertainties, parameter perturbations and external disturbances. A fuel-consumption-optimal controller is firstly designed by approximately solving the HJB function based on D method. Then feedforward compensation based on nonlinear disturbance observers is introduced for robustness reinforcement. Stability analysis of the closed-loop system and simulation studies based on AHV longitudinal dynamics are provided to demonstrate the effectiveness of the proposed composite optimal controller.