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Robust Integrated Autopilot Design for an Aircraft

In this work, a nonlinear mathematical model for a rigid aircraft is considered. A robust controller employing Uncertainty and Disturbance Estimator (UDE) as its control strategy has been proposed to obtain the desired tracking performance. Uncertainties and disturbances have been introduced in the form of parametric variations, system nonlinearities and varying external disturbances. Numerical simulations have been carried out to ascertain the efficacy of the proposed control strategy. Further, a comparison study of the proposed controller with a input-output linearized controller also employing UDE has been carried out.