Abstract
This paper proposes an adaptive controller for a hypersonic cruise vehicle subjected to thrust and actuator uncertainties. The controller is derived using a nonlinear dynamics model of a generic airbreathing hypersonic vehicle, which has been addressed by Bolender, Doman, and their coworkers. The model is physics based, incorporates compressibility eects of air through Prandtl-Meyer and shock theory, elastic eects, and the coupling between the airframe and combustion system. Several uncertainties are introduced in this model that mimic thrust loss, actuator saturation, as well as loss of control eectiveness. An adaptive controller that eectively accomplishes command following under cruise conditions in the presence of these uncertainties is developed. The robustness of this controller is guaranteed in the presence of disturbances, unmodeled dynamics, and actuator saturation. Simulation results using the high-delity model are provided to illustrate the properties of the adaptive robust controller.
Published Version
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