Design, Analysis, and Flexibility Evaluation of a Double-Mode Underactuated Coupled-Drive Omnidirectional Mobile Robot

IF 5.2 2区 计算机科学 Q2 ROBOTICS
Zhiguo Lu, Yulong Ren, Chong Liu, Siyang Chen, Yiheng Zhao
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Abstract

Current omnidirectional mobile robots often utilize Mecanum wheels, omnidirectional wheels, or steering wheels, but these technologies present certain operational limitations. This paper investigates a double-mode underactuated coupled-drive omnidirectional mobile robot to improve adaptability and flexibility across various terrains. By designing a double-crank linkage and cross-slider mechanism, the robot achieves omnidirectional translation and in-place rotation modes without using the steering wheel. In the translation mode, the four wheels act as an integrated system, always remaining parallel; in the rotation mode, each wheel can independently rotate around its respective yaw axis, enabling the robot to rotate. This structure significantly reduces the turning radius of the robot. By utilizing the cross slider in conjunction with limit blocks, the relative positions of the double connecting rods are constrained, ensuring the robot maintains a constant posture during omnidirectional movement and resolving the uncertainty and dead-center position issues in the double-crank connecting rod motion process. The omnidirectional mobile robot studied in this paper has applied for a patent. To validate the feasibility of the robot's motion modes, structural analysis, dynamic analysis, and kinematic analysis were conducted, and the stability and flexibility of the robot were verified through physical experiments.

Abstract Image

双模欠驱动耦合驱动全向移动机器人的设计、分析与柔性评价
目前的全向移动机器人多采用Mecanum轮、全向轮或转向轮等技术,但这些技术存在一定的操作局限性。本文研究了一种双模欠驱动耦合驱动全向移动机器人,以提高其在各种地形上的适应性和灵活性。通过设计双曲柄连杆机构和交叉滑块机构,实现了不使用方向盘的全方位平移和原地旋转模式。在平移模式下,四个车轮作为一个整体系统,始终保持平行;在旋转模式下,每个轮子可以绕各自的偏航轴独立旋转,使机器人能够旋转。这种结构大大减小了机器人的转弯半径。利用十字滑块配合限位块对双连杆的相对位置进行约束,保证机器人在全向运动中保持恒定的姿态,解决了双曲柄连杆运动过程中的不确定性和死点位置问题。本文所研究的全向移动机器人已经申请了专利。为了验证机器人运动方式的可行性,进行了结构分析、动力学分析和运动学分析,并通过物理实验验证了机器人的稳定性和灵活性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Field Robotics
Journal of Field Robotics 工程技术-机器人学
CiteScore
15.00
自引率
3.60%
发文量
80
审稿时长
6 months
期刊介绍: The Journal of Field Robotics seeks to promote scholarly publications dealing with the fundamentals of robotics in unstructured and dynamic environments. The Journal focuses on experimental robotics and encourages publication of work that has both theoretical and practical significance.
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