Robust integrated guidance and control design method for UCAV based on trajectory linearization control

The problem of integrated guidance and control(IGC) design for the unmanned combat aerial vehicle(UCAV) terminal impact is investigated. In this paper, the IGC system model is established, which reduces the difficulties of designing control method, then, an IGC control law is designed based on trajectory linearization control(TLC). In order to deal with high uncertainties, such as aerodynamic parameter perturbation, measurement error interference, target maneuver, and so on, a nonlinear disturbance observer(NDO) is introduced to the IGC control system. By using the Lyapunov theorem, the stability of the designed method is proved. Simulation results demonstrate the superiority and effectiveness of the proposed IGC design method in the aspects of guidance accuracy and system robustness.