遥操作骨科手术机器人力反馈主控端机构设计与分析

Design and Analysis of the Force Feedback Master Mechanism for Teleoperated Orthopedic Surgical Robot

  • 摘要: 针对骨科手术机器人遥操作过程中力反馈不足、主从交互精度要求高及大反馈力复现困难等问题,开展力反馈主控端机构设计、建模与控制相关研究。首先,基于骨科手术中的单向大反馈力需求,设计一种单自由度直线型力反馈主手,并实现最大40 N的反馈力输出;其次,提出一种平动与转动解耦的多自由度力反馈主手构型,实现位置、姿态与夹持操作的协同输入;最后,建立多自由度主手运动学、动力学及反馈力映射模型,设计基于动力学补偿与关节力矩控制的力反馈控制方法,并通过仿真分析验证模型的准确性和控制可行性。实验结果表明,所设计主手能够满足骨科手术对大反馈力、高精度、低耦合和良好操作性的需求,可为遥操作骨科手术机器人主从力位映射、力反馈控制及系统集成提供机构基础和理论依据。

     

    Abstract: Addressing issues such as insufficient force feedback, high precision requirements for master-slave interaction, and difficulties in reproducing large feedback forces during the teleoperation of orthopedic surgical robots, research on the design, modeling, and control of the force feedback master-end mechanism is conducted. Firstly, based on the unidirectional large feedback force requirement in orthopedic surgical teleoperation, a single-degree-of-freedom linear force feedback master hand is designed, achieving a maximum feedback force output of 40 N. Secondly, a multi-degree-of-freedom force feedback master hand configuration with decoupled translational and rotational motions is proposed, enabling coordinated input for position, orientation, and grasping operations. Finally, kinematic, dynamic, and feedback force mapping models for the multi-degree-of-freedom master hand are established, and a force feedback control method based on dynamic compensation and joint torque control is designed. The accuracy and control feasibility of the model are verified through simulation analysis. Experimental results show that the designed master hand can meet the requirements of teleoperation orthopedic surgery for large feedback forces, high precision, low coupling, and good operability. It can provide a mechanical foundation and theoretical basis for master-slave force-position mapping, force feedback control, and system integration of teleoperation orthopedic surgical robots.

     

/

返回文章
返回