中国科技核心期刊

中文核心期刊

CSCD来源期刊

空间控制技术与应用 ›› 2015, Vol. 41 ›› Issue (3): 28-32.doi: 10.3969/j.issn.1674-1579.2015.03.006

• 学术研究 • 上一篇    下一篇

一种带大挠性附件卫星的低阶鲁棒控制方法

  

  • 出版日期:2015-06-24 发布日期:2015-07-09

LowOrder Robust Control for Satellite with Large Flexible Appendages

  • Online:2015-06-24 Published:2015-07-09

摘要: 针对带有大挠性附件卫星存在参数不确定性和外部扰动的问题,提出一种基于线性矩阵不等式(LMI)的鲁棒H∞反馈控制方法.在卫星动力学模型中考虑了太阳帆板对日定向转动及天线展开过程中参数的摄动问题,进一步设计适用于线性参数时变(LPV)系统的多输入多输出(MIMO)反馈控制器,证明闭环系统在参数大范围摄动下的鲁棒稳定性.相比经典控制方法,当结构参数变化较大且三轴姿态为动态时变时,在满足期望性能指标的同时,可以有效地抑制挠性附件的振动且具有较强的抗扰能力.最后通过仿真验证了所提方法的有效性. 关键词: 挠性卫星;姿态控制;H∞控制;线性参数时变系统;线性矩阵不等式(LMI)

关键词: 挠性卫星, 姿态控制, 控制, 线性参数时变系统, 线性矩阵不等式(LMI)

Abstract: To deal with the flexible parameters uncertainties and external torque disturbance problems of satellites with large flexible appendages, a robust Hinfinity feedback multiinput, multioutput (MIMO) controller is proposed based on linear matrix inequalities (LMI). Parameters perturbations that caused by solar paddles rotating towards the sun and antenna’s expanding process are considered in the coupled dynamics of satellite. The proposed robust controller guarantees robust stability against the a forementioned higher vibration modes and modal parameters uncertainties for a linear parameter varying (LPV) MIMO system. Moreover, it is simple and suitable for engineering practice. The simulation results show that the given controller provides rapid stabilization for threeaxis attitude control, and is more robust than the typical PID controller in vibration and disturbance suppression.

Key words: flexible satellite, attitude control, control, LPV system, LMI

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