摘要
针对综合离心力/气动力的吸气式升力体高超声速飞行器,建立了飞行器刚体动力学矢量模型,得到了面向巡航控制的纵向运动模型。考察了地球曲率半径与自转角速度对高超声速飞行器运动建模的影响模式;分析了地球曲率半径对飞行器径向受力、稳态特性与动态响应的影响。分析表明:对于高超飞行器,离心力等惯性力对升力的贡献已到了相当的比例,在建模时必须考虑;对飞行器高度、俯仰动态模态影响剧烈,同样需要特殊对待。
The rigid-body dynamics vector model of integrated centrifugal/aero force air-breathing hypersonic vehicles was developed in this paper. And a cruise-control-oriented longitudinal motion model was obtained. The impact mode of curvature radius and rotation of the earth to modeling of hypersonic vehicles had been studied. The effect of curvature radius to radial stress state, steady characteristics and dynamic response had been analyzed. Results show that inertia force such as centrifugal force must be considered during modeling for hypersonic vehicles because it has a great contribution to lifting force required. Inertia force also has a great impact on the dynamic characteristics which also indicated it should be taken in consideration.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2009年第1期128-133,144,共7页
Journal of Astronautics
基金
国家自然科学基金重大研究计划(90716012)
关键词
综合离心力/气动力
升力体高超声速飞行器
纵向运动建模
地球曲率半径
离心力
Integrated centrifugal/aero force
Lifting-body hypersonic vehicles
Longitudinal motion modeling
Curvature radius of the earth
Centrifugal force
