中文摘要：

针对高超声速飞行器建模中气动．推进．弹性结构之间的耦合问题，给出飞行器综合建模方法．利用空气动力学相关理论估算气动力、推力及弹性模态，建立了高超声速飞行器弹性体机理模型和面向控制模型，分析了气动加热和质量变化对飞行器弹性模态的影响及纵向气动特性．实验结果表明，气动加热和质量变化对弹性模态影响显著，面向控制模型能降低模型的复杂度，保留机理模型的耦合特性，并为控制器设计提供模型依据．

英文摘要：

Considering the mutual couplings in aerodynamics, propulsion and flexible structure in the hypersonic vehicle, a synthetic method of modeling is given. Firstly, the aerodynamic theory is used to estimate aerodynamic forces, thrust and flexible mode of hypersonic vehicle. The control-oriented model for a flexible hypersonic vehicle is developed. Then, the effects of aerodynamic heating and mass decrease on the natural frequencies and mode shapes, and the longitudinal aerodynamic characteristics are analyzed. The simulations show that the aerodynamic heating and mass decrease of the fuselage affect the flexible modes significantly. The control-oriented model can not only reduce the complexity of the model but also retain the coupling characteristics, and can be applied to controller design.