平流层卫星建模与基于分级模型的轨道控制

Modeling of a stratospheric satellite and the orbit control based on hierarchical models

中文关键词  平流层卫星  建模  轨迹控制  反馈线性化

英文关键词  stratospheric satellite  modeling  trajectory control  feedback linearization

中文摘要

      为实现平流层卫星在平流层大气环流作用下环某一纬度飞行, 需对平流层卫星经度方向轨迹进行控制. 根 据Lagrange方程建立了其六自由度的动力学模型, 在基于模型的直接输入输出反馈线性化无法实现的情况下, 按 “舵控制帆、帆控制绳和绳控制球”的工作原理将系统分为3个级联子系统, 并对3个子系统分别设计控制器来实现 “舵控制球”的轨迹控制. 仿真结果表明所设计的控制器性能良好.

英文摘要

      To implement the flight of stratospheric satellites along latitudinal orbits in atmospheric circulation, the longitudinal trajectories of the stratospheric satellite must be controlled. First, the 6-DOF dynamic model of a stratospheric satellite is established based on the Lagrange dynamic formulation for the longitudinal trajectory control design. Because the input/output linearization method is not applicable to this model, the whole system is decomposed into three cascaded subsystems based on the flight-control mechanism of the satellite, i.e. the rudder controls the stratosail, the stratosail supports the tether, and the tether drags the balloon; and then, three separate controllers are developed for each subsystems to achieve the trajectory control of the balloon via the rudder. Simulation results demonstrate the effectiveness of the proposed controllers.