The Propulsion/Flight Dynamics Coupling Analysis for Air-breathing Hypersonic Vehicle

The airframe/propulsion integration configuration, brought strong couplings between aerodynamic and propulsion system, making modeling and control of hypersonic vehicles a huge challenge e. Therefore, true reflection the coupling characteristics was great significance. Based on response surface methods, aerodynamic/propulsion coupling model was built in this paper, and small perturbation linear model was also derived. Then, using matrix eigenvalue perturbation theory, propulsion system effects on flight dynamics were analyzed. The results showed that hypersonic flight dynamics was much more sensitive to the propulsion effects, which reflected the strong coupling between propulsion system and flight dynamics.