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Aeroelastic modes are significant dynamic coupling in flexible hypersonic vehicle. This paper focus on the aeroelasitc modes in hypersonic vehicle model. The effects of elastic deformation of fuselage on the control angle and aerodynamic are analyzed. First, the analytical expressions of the changes of angle of attack and elevon deflection are presented. Then, Linear Piston Theory is used to evaluate...
Near Space Vehicles draw more attention for its high speed transportation and affordable space access. However, advanced control methods for Near Space Vehicles always required full information on the state. In this paper, a higher-order sliding-mode observer is proposed in MIMO nonlinear longitudinal dynamic equations. The observable states can be estimated exactly and the unobservable ones will...
To the highly nonlinear, significant input-output coupling and remarkable external disturbance of near space vehicle (NSV), a dynamic inversion control method based on H∞ optimal control is proposed. This method combines the robustness of H∞ optimal control theory and nonlinear decoupled control ability of the dynamic inversion control well, so it is possible to achieve highly nonlinear decoupled...
An adaptive back-stepping controller is designed and analyzed for the longitudinal dynamics of a generic Near Space Vehicle. This vehicle model is nonlinear, multivariable, and unstable including uncertain parameters. Back-stepping approaches utilize Lyapunov theory to guarantee stability of the closed system and the methods are inherently recursive. Simulation studies are conducted to demonstrate...
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