Robust control with disturbance observer for UAV translational tracking

An integral robust observer with rejection control disturbance is proposed in this paper. The design of the observer is performed employing the canonical obervable model of the original non-linear system, obtained by a change of coordinates. A practical stability is proved using the Lyapunov approach with using a high gain to maintain the solution in a convergence ball. Several simulations cases are carried out to illustrate the performance of the closed-loop system in a disturbance wind prepense. In other cases, noise in the states are added to emulate a real system.