arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2202.01969cs.ROcs.SYeess.SYmath.DG
收藏

基于微分几何的轮式差动移动机器人辅助控制器

A Novel Assistive Controller Based on Differential Geometry for Users of the Differential-Drive Wheeled Mobile Robots

Tohoku University(东北大学)

Seyed Amir Tafrishi, Ankit A. Ravankar, Jose Salazar, Yasuhisa Hirata

摘要:

某些轮式移动机器人,例如,电动轮椅可以通过用户的间接操纵杆控制来操作。当用户应该确定车辆方向和速度时,正确的转向角变得至关重要,特别是对于差动轮式车辆,因为车辆速度和方向仅用两个驱动轮控制。当用户需要实现复杂曲线时,这个问题变得更具挑战性。一种新的辅助控制器与安全约束,需要解决这些问题。而且,经典的控制方法大多需要预先确定期望的状态,这与人类对期望位置的自发决定完全矛盾。在这项工作中,我们开发了一种新的辅助控制策略的基础上微分几何只依赖于操纵杆输入和车辆状态的控制器不需要任何所需的状态。我们首先解释车辆运动学和我们设计的达布框架运动学的一个虚拟的车轮和平面的接触点。其次,几何控制器使用达布框架运动学的设计具有一定的安全约束下的平滑轨迹。我们用不同的参与者实验我们的方法,并评估其在各种路线上的表现。

英文摘要:

Certain wheeled mobile robots e.g., electric wheelchairs, can operate through indirect joystick controls from users. Correct steering angle becomes essential when the user should determine the vehicle direction and velocity, in particular for differential wheeled vehicles since the vehicle velocity and direction are controlled with only two actuating wheels. This problem gets more challenging when complex curves should be realized by the user. A novel assistive controller with safety constraints is needed to address these problems. Also, the classic control methods mostly require the desired states beforehand which completely contradicts human's spontaneous decisions on the desired location to go. In this work, we develop a novel assistive control strategy based on differential geometry relying on only joystick inputs and vehicle states where the controller does not require any desired states. We begin with explaining the vehicle kinematics and our designed Darboux frame kinematics on a contact point of a virtual wheel and plane. Next, the geometric controller using the Darboux frame kinematics is designed for having smooth trajectories under certain safety constraints. We experiment our approach with different participants and evaluate its performance in various routes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑