Integrated Low-speed Dynamic Modeling of Air-breathing Aerospace Vehicles

Abstract

This paper presents a low speed stability and control analysis of air-breathing horizontal take-off and horizontal landing (HTHL) aerospace vehicle, which is powered by turbine based combined cycle engine in turbofan mode. First, the conceptual HTHL vehicle and control-oriented dynamic modeling framework is introduced. Then, in order to emphasize stability and flying quality constraints in the concept design phase of HTHL aerospace vehicle, necessary conditions for the maximum allowable center-of-gravity travel are derived and casted as linear matrix inequalities, for which efficient numerical solver is available. Finally, as a preliminary investigation, and to verify the proposed dynamic modeling framework, the feasible center-of-gravity position of the concept HTHL aerospace vehicle is studied.