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Integrated flight/propulsion control for unknown hypersonic flight vehicles systems

In this paper, a tracking control problem for the unknown longitudinal model of hypersonic flight vehicle is investigated. One remarked advantage is that not only less adjustable parameters are used in the design but also the design is independent of the model. Based on the characteristics of the longitudinal dynamics, The hypersonic flight vehicle system is divided into two subsystems, including an attitude subsystem and a velocity subsystem. The prescribed performance control theory is adopted to construct nonlinear PID controller for velocity subsystem. Then, for attitude subsystems, a novel recursive design procedure is constructed to remove the difficulties of unknown model by integrating mean value theory with a novel bounded estimation approach. Finally, simulation results are provided to demonstrate the effectiveness of the proposed method.