一种适用于冗余或非冗余机械臂的实时轨迹跟踪控制方法和系统

By using a data-driven adaptive control method to update the pseudo-inverse of the Jacobian matrix in real time, the trajectory tracking problem of the robotic arm in a dynamic and uncertain environment is solved, achieving high-precision and robust trajectory tracking control, which is applicable to both redundant and non-redundant robotic arms.

CN121989262BActive Publication Date: 2026-07-17HUNAN UNIV

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUNAN UNIV
Filing Date
2026-04-09
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing robotic arm control methods rely heavily on precise dynamic models, making it difficult to adapt to the dynamic uncertainties of real-world systems. This results in non-redundant robotic arms being insufficiently adaptable to disturbed environments, while redundant robotic arms suffer from improper allocation of redundant degrees of freedom in complex tasks, affecting trajectory tracking accuracy and robustness.

Method used

A data-driven adaptive control method is adopted, which updates the pseudo-inverse matrix of the Jacobian matrix online by measuring the end-effector pose increment in real time, thereby achieving real-time trajectory tracking without relying on an accurate model. This method is applicable to both redundant and non-redundant robotic arms.

Benefits of technology

It improves the trajectory tracking accuracy and robustness of the robotic arm in complex environments, reduces the dependence on precise models, enhances the practicality and stability of the system, and has good versatility and environmental adaptability.

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Abstract

本发明公开了一种适用于冗余或非冗余机械臂的实时轨迹跟踪控制方法和系统,包括:系统初始化,设定参数并确定轨迹起点;生成机械臂末端在三维空间中的连续期望轨迹;计算初始关节速度指令,获得下一周期关节角;在后续每个控制周期中,测量实际位姿并计算其增量,利用递推公式在线更新雅可比矩阵的伪逆,进而结合期望位姿误差与上一周期指令,计算当前关节速度指令并更新关节角;循环执行直至轨迹跟踪完成。该方法通过实际位姿增量在线更新伪逆,不依赖精确的固定运动学模型,降低了建模与维护成本,统一适用于冗余与非冗余机械臂,增强了算法的通用性。通过持续自适应调整,有效减小跟踪误差,提升轨迹精度与系统在复杂工况下的稳定性和鲁棒性。
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