Abstract
The focus of this paper is uncertainty modeling and controller designing of air-breathing hypersonic vehicle. First, the hypersonic vehicle longitudinal dynamics model is made on the base of the fitting of aerodynamic parameters. As to the uncertainty of model parameters, a linear model of the uncertain part is established and the LQR controller parameters are thereupon designed with state transition and a first-order Taylor series expansion method, based on feedback linearization of the system. The simulation results that the hypersonic flight control system stated in this paper can well realize the tracking of speed and trajectory angle input command under the situation of floating model parameters.
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