应用科学学报 ›› 2009, Vol. 27 ›› Issue (6): 651-656.

• 控制与系统 • 上一篇    下一篇

卫星编队飞行的神经网络滑模控制

  

  1. 1. 南京航空航天大学自动化学院,南京210016
    2. 南京航空航天大学航天学院, 南京210016
  • 出版日期:2009-11-25 发布日期:2009-11-25

Neural Network-Based Sliding Mode Control for Satellite Formation Flying

  1. 1. College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
    2. College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Online:2009-11-25 Published:2009-11-25
  • About author:GAO You-tao, Ph.D. candidate, research interests including dynamics and control of spacecraft formation flying, E-mail: ytgao@nuaa.edu.cn; LU Yu-ping, Ph.D., professor, research interests including advanced flight control technology, autonomous UAV control and task management, robust control, E-mail: yplac@nuaa.edu.cn
  • Supported by:

    Project supported by the "863" National High-Tech Research and Development Program of China (No. 2008AA12Z301)

摘要:

该文推导卫星编队飞行的一般相对运动动力学模型,研究将指数趋近律滑模控制与神经网络控制相结合的卫
星编队飞行控制方法,设计一种径向基神经网络参数调节器. 实时调节指数趋近律的参数,从而取得滑动面的趋近速度
和燃料消耗的最优平衡. 采用指数趋近律滑模控制法,用饱和函数代替可能产生高频切换信号的开关函数,有效地削弱
了滑模控制的抖动. 二阶滑模控制结构保证了卫星编队的高精度控制. 仿真结果表明了这一控制方法的有效性.

关键词: 卫星编队飞行, 滑模控制, 神经网络, 抖振, 鲁棒性

Abstract:

The general dynamical model of satellite formation flying is derived. A sliding mode control method
based on neural networks is proposed to improve control accuracy and robustness of satellite formation flying. A
neural network based on radial basis function is designed to modify the parameters of exponent reaching law in
order to get an optimal balance between convergence speed of the sliding quantity and fuel consumption. Exponent
reaching law with saturation function is used to weaken chattering actuated by un-modeled dynamics and high
frequency switching control. The second order sliding quantity of the relative position error is used to improve the
control accuracy. Simulation results show effectiveness of the neural network-based sliding mode control method.

Key words: satellite formation flying, sliding mode control, neural network, chattering, robustness

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