MHD Flow-Control for Hypersonic Flight

Micro-Ramps for Hypersonic Flow Control

Shock/boundary layer interaction (SBLI) is an undesirable phenomenon, occurring in high-speed propulsion systems. The conventional method to manipulate and control SBLI is using a bleed system that involves the removal of a certain amount of mass of the inlet flow to control boundary layer separation. However, the system requires a larger nacelle to compensate the mass loss, larger nacelles con...

Evolutionary Design of Robust Flight Control for a Hypersonic Aircraft

An evolutionary design approach is used to construct an autopilot for a hypersonic airbreathing aircraft. Flight control for this class of vehicle is an extremely challenging problem due to the combination of nonlinear dynamics, parametric uncertainty and complex constraints. Consequently, simultaneous control over the flight path, aerodynamic attitude and propulsion is required. This thesis de...

Propulsion Systems for Hypersonic Flight

Discrete-time hypersonic flight control based on extreme learning machine

This paper describes the neural controller design for the longitudinal dynamics of a generic hypersonic flight vehicle (HFV). The dynamics are transformed into the strict-feedback form. Considering the uncertainty, the neural controller is constructed based on the single-hidden layer feedforward network (SLFN). The hidden node parameters are modified using extreme learning machine (ELM) by assi...

Observer Based Dynamic Surface Control of a Hypersonic Flight Vehicle

This paper describes the design and analysis of a proportional integral air speed controller and a nonlinear adaptive dynamic surface altitude controller for the longitudinal dynamics of a generic hypersonic flight vehicle. The uncertain nonlinear functions in the pure feedback flight vehicle model are approximated by using radial basis function neural networks. For the controller design, the c...