COMPOSITE ADAPTIVE AND ROBUST CONTROL OF COORDINATED MOTION OF SPACE MANIPULATOR WITH PRISMATIC JOINT
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摘要: 讨论了载体位置不受控制情况下,带滑移铰空间机械臂姿态与末端抓手协调运动的控制问题.结合系统动量守恒关系进行的运动学、动力学分析表明,可以得到一组与惯性参数呈线性关系的系统广义Jacobi矩阵及系统动力学方程.以此为基础,针对系统参数不确定但误差范围可以确定的情况,设计了载体姿态与末端抓手惯性空间期望运动轨迹跟踪的自适应与鲁棒混合控制方案.提到的控制方案具有不需要测量空间机械臂载体移动的位置、速度及加速度的显著优点,且由于在控制部分对不确定参数采用保持鲁棒性的方式,计算量较小,有助于缓解机载计算机运算能力有限的矛盾.仿真运算,证实了方法的有效性.
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关键词:
- 带滑移铰空间机械臂 /
- 协调运动 /
- 自适应与鲁棒混合控制
Abstract: In this paper, the coordinated control of the base attitude of space manipulator system with prismatic joint and its arms is studied. With the momentum conservation of system, the kinematics and dynamics of system are analyzed. It is shown that the generalized Jacobi matrix and dynamic equations of the system can be linearly dependent on a group of inertial parameters. Based on the results proposed above, the composite adaptive and robust control scheme of coordinated motion for both the base and manipulator to track the desired trajectory is developed. The control scheme proposed above possesses the advantages that need no measuring or controlling the position, velocity and acceleration of the base with respect to the orbit due to an effective use of the particular property of the system dynamics. Besides it is computationally simple because an approach is chosen to make the controller robust to the uncertain inertial parameters rather than explicitly estimating them online. A two-link planar space manipulator system is simulated to verify the proposed controlling scheme. -
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