吸气式高超声速飞行器动力学建模研究进展

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. 

RESEARCH PROGRESSES ON FLIGHT DYNAMICS MODELING OF AIRBREATHING HYPERSONIC FLIGHT VEHICLES

The flight dynamiccharacteristics of Airbreathing Hypersonic Flight Vehicles (AHFV)are quite different from the traditional flight vehicles due tothe hypersonic speed regime and the integrated design of waveriderairframe and airbreathing sramjet. The process of designing thevehicle or its control system involves the novel dynamiccharacteristics of AHFVs, so it is crucial to establish a newclass of vehicle-dynamic model that sought to identify criticalissues in flight dynamics of AHFVs. A review is presented with thefocus on the contributions to the development of this new model.First, a brief history of AHFVs from the scramjet research stageto system research stage is outlined. After that, the brand newflight dynamic characteristics of AHFVs are elaborated, includingwide flight ranges, effects of hypersonic speed, constraint ofscramjet, airframe/propulsion interaction, effects ofaeroelasticity. Then followed by a discussion on problems andpossible solutions encountered in modeling the flight dynamics ofAHFVs, which can be divided into the following steps: selection ofcoordinate system, abstraction of the vehicle shape, modeling theelastic airframe, modeling the aerodynamics, modeling the scramjetsystem and derivation of the equations of motion. In the end, Somecomments and future directions on modeling the flight dynamics ofAHFVs are addressed.