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自由漂浮空间机器人路径优化的Legendre伪谱法

戈新生 陈凯捷

戈新生, 陈凯捷. 自由漂浮空间机器人路径优化的Legendre伪谱法[J]. 力学学报, 2016, 48(4): 823-831. doi: 10.6052/0459-1879-16-158
引用本文: 戈新生, 陈凯捷. 自由漂浮空间机器人路径优化的Legendre伪谱法[J]. 力学学报, 2016, 48(4): 823-831. doi: 10.6052/0459-1879-16-158
Ge Xinsheng, Chen Kaijie. PATH PLANNING OF FREE FLOATING SPACE ROBOT USING LEGENDRE PSEUDOSPECTRAL METHOD[J]. Chinese Journal of Theoretical and Applied Mechanics, 2016, 48(4): 823-831. doi: 10.6052/0459-1879-16-158
Citation: Ge Xinsheng, Chen Kaijie. PATH PLANNING OF FREE FLOATING SPACE ROBOT USING LEGENDRE PSEUDOSPECTRAL METHOD[J]. Chinese Journal of Theoretical and Applied Mechanics, 2016, 48(4): 823-831. doi: 10.6052/0459-1879-16-158

自由漂浮空间机器人路径优化的Legendre伪谱法

doi: 10.6052/0459-1879-16-158
基金项目: 国家自然科学基金资助项目(11472058).
详细信息
    通讯作者:

    戈新生,教授,主要研究方向:多体系统动力学、航天器姿态动力学与控制.E-mail:gebim@vip.sina.com

  • 中图分类号: V448.2

PATH PLANNING OF FREE FLOATING SPACE ROBOT USING LEGENDRE PSEUDOSPECTRAL METHOD

  • 摘要: 基于Legendre 伪谱法研究自由漂浮空间机器人非完整路径规划的最优控制问题. 自由漂浮是空间机器人执行任务常用的工作模式,其路径优化是空间机器人完成复杂空间任务的基础. 由于空间机器人不具有固定基座,机械臂和载体之间存在非完整约束,使得自由漂浮空间机器人路径规划完全不同于地面机器人而变得具有挑战性. 本文提出自由漂浮空间机器人路径规划的最优控制伪谱方法. 首先,利用多体动力学理论建立自由漂浮空间机器人动力学模型,给定系统的初始和目标位形,选取机械臂关节耗散能最小为性能指标,并考虑实际控制输入受限,建立其路径规划的Bolza 问题. 然后,应用Legendre 伪谱法,将状态和控制变量在Legendre-Gauss-Lobatto (LGL) 点上离散,并构造Lagrange 插值多项式逼近系统状态和控制变量,将连续路径优化问题离散化为非线性规划问题求解. 最后通过数值仿真表明,应用Legendre 伪谱法求解自由漂浮空间机器人非完整路径规划问题,得到的机械臂和载体最优运动轨迹,较好地满足各种约束条件,且计算精度高、速度快,并具有良好的实时性.

     

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出版历程
  • 收稿日期:  2016-06-06
  • 修回日期:  2016-06-13
  • 刊出日期:  2016-07-18

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