The flight dynamic characteristics of Airbreathing Hypersonic Flight Vehicles (AHFV) are quite different from the traditional flight vehicles due to the hypersonic speed regime and the integrated design of waverider airframe and airbreathing sramjet. The process of designing the vehicle or its control system involves the novel dynamic characteristics of AHFVs, so it is crucial to establish a new class of vehicle-dynamic model that sought to identify critical issues in flight dynamics of AHFVs. A review is presented with the focus on the contributions to the development of this new model. First, a brief history of AHFVs from the scramjet research stage to system research stage is outlined. After that, the brand new flight dynamic characteristics of AHFVs are elaborated, including wide flight ranges, effects of hypersonic speed, constraint of scramjet,airframe/propulsion interaction, effects of aeroelasticity. Then followed by a discussion on problems and possible solutions encountered in modeling the flight dynamics of AHFVs, which can be divided into the following steps:selection of coordinate system, abstraction of the vehicle shape, modeling the elastic airframe, modeling the aerodynamics, modeling the scramjet system and derivation of the equations of motion. In the end, Some comments and future directions on modeling the flight dynamics of AHFVs are addressed.%高超声速飞行以及飞行器机身/超燃冲压发动机一体化设计的典型特点导致吸气式高超声速飞行器具有不同于常规飞行器的飞行动力学特性,而飞行器总体设计和控制系统设计都必须考虑这些新动力学特性的影响,因此为吸气式高超声速飞行器建立能够包含这些新特性的飞行动力学模型非常重要.本文对吸气式高超声速飞行器动力学建模的相关研究进行了总结:首先,简略地回顾了从超燃冲压发动机研究到飞行器系统研究发展历程;其次,详细阐述了宽飞行包线、高超声速效应、超燃冲压发动机约束、气动/推进耦合和气动弹性效应等吸气式高超声速飞行器的新动力学特性;然后,讨论了在选择坐标系、抽象飞行器外形、建立弹性机身模型、建立空气动力模型、建立超燃冲压发动机系统模型以及推导运动方程等每个具体步骤中需要考虑的问题和可用的方法;最后,评述了现有吸气式高超声速飞行器动力学模型,并指明了未来发展方向.
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