摘要
平流层卫星由超压气球提供静浮力,气动帆提供轨道控制力,系绳传递各力。能够在一定纬度范围内沿东西方向缓慢运动,因此平流层卫星是一种良好的通信与对地观测平台。首先分析平流层风场特性,给出平流层卫星的组成与工作原理,采用"质量-集中弹性绳"模型,把气球和气动帆分别看作系绳节点,根据各部分动力学特性分别建模;采用Matlab软件平台进行动态仿真,利用不同海拔之间的风速差,产生侧向控制力进行南北方向轨道控制的方法。仿真结果证实气动帆轨道控制系统能够实现平流层卫星南北方向的稳定控制与机动调整。
Static buoyancy provided by super-pressurized balloon,orbit control force provided by Strato-Sail,each force transferred by tether. Stratospheric satellite moves slowly toward east and west in given latitude. It is an excellent platform of communications and surveillance. The characteristic of stratosphere wind field is analyzed. The constitution and principle of stratospheric satellite is discussed. Using a model of lump-mass-and-spring,considering the super-pressurized balloon and Strato-Sail as the tether nodes,each component is modeled based on dynamic characteristic. Simulated by Matlab/Simulink,the control method is studied to exploit the difference of wind velocity at different altitudes to generate lateral forces to control latitude orbit. Simulation results show that the Strato-Sail orbit control system can achieve the steady control and adjust the latitude position of stratospheric satellite.
出处
《计算机仿真》
CSCD
北大核心
2010年第9期79-82,101,共5页
Computer Simulation
关键词
平流层卫星
质量-集中弹性绳
轨道控制
动态仿真
Stratospheric satellite
Lump-mass-and-spring tether
Orbit control
Dynamic simulation
