Modeling method for multidisciplinary optimization of hypersonic flight vehicle

To set up Multidisciplinary Design Optimization (MDO) software system of hypersonic flight vehicle, a kind of modeling method oriented to MDO was studied. By analyzing disciplinary design conflicts of multidisciplinary system, two conditions to guarantee continuity of multidisciplinary system were established. According to these two conditions, the method for constructing system analysis and optimization models of MDO was presented by combining with the existing flight vehicle design process. With this method, a hypersonic flight vehicle MDO problem, including five disciplines of trajectory/control, aerodynamics, supersonic combustion ramjet, structure and thermal protection system, were discussed. Based on this MDO modeling method, systematic model was constructed, software of each discipline was integrated into MDO framework, and software which could be used in conceptual design process of hypersonic flight vehicle was developed.