摘要
为降低微小卫星的成本和提高卫星可靠性,研究采用磁力矩器作为唯一执行机构对卫星进行三轴姿态稳定的问题。利用线性二次型调节器(Linear Quadratic Regulator,LQR)最优控制理论分别设计无限时间状态调节器和定常增益状态调节器,实现纯磁控下的微小卫星对地三轴稳定控制。同时结合卫星实际工程应用,以在轨飞行的"开拓一号"卫星为研究对象,分析卫星惯量积、轨道倾角、剩磁干扰、气动干扰等因素对控制精度的影响。仿真结果表明LQR控制器具有稳定性和实用性,在小干扰情况下,控制精度较高。
To reduce the cost and improve the reliability of micro-satellites,a method which employing magnetic torques as the only actuators was developed to realize three axis stable control.Then by using linear quadratic regulator（LQR）optimal control theory,the infinite time state regulator and steady gain regulator were designed to stabilize micro-satellite to nadir pointing using fully magnetic torques.Meanwhile,taking KaiTuo-1 satellite in-orbit flight as the research object,the product of inertia,orbit inclination,residual magnetism and aerodynamic drag disturbance that brings different effects for the control precision were analyzed.Simulation results validate efficiency and practicability of LQR controller.It can achieve high control precision under little disturbance.
出处
《中国空间科学技术》
EI
CSCD
北大核心
2017年第4期28-33,共6页
Chinese Space Science and Technology
关键词
微小卫星
三轴姿态稳定
磁控
最优控制
控制精度
micro-satellite
3-axis attitude stability
magnetic control
optimal control
control precision
