Abstract

This paper proposes a control scheme applied to the delayed bilateral teleoperation of wheeled robots with force feedback, considering the performance of the operator’s command execution. In addition, the stability of the system is analyzed taking into account the dynamic model of the master as well as the remote mobile robot under asymmetric and time-varying delays of the communication channel. Besides, the performance of the teleoperation system, where a human operator drives a 3D simulator of a wheeled dynamic robot, is evaluated. In addition, we present an experiment where a robot Pioneer is teleoperated, based on the system architecture proposed.

Highlights

  • Robot teleoperation allows the execution of different tasks in remote environments including possibly dangerous and harmful jobs for the human operator [1]

  • This paper proposes a control scheme applied to the delayed bilateral teleoperation of wheeled robots with force feedback, considering the performance of the operator’s command execution

  • The work has presented a bilateral teleoperation controller for wheeled robots under time delays, in which the master controller is a PD-like scheme with gravity compensation and the slave controller is a scheme that incorporates an impedance compensation based on fictitious force and a variable gain, employed for obstacle avoidance

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Summary

Introduction

Robot teleoperation allows the execution of different tasks in remote environments including possibly dangerous and harmful jobs for the human operator [1]. [27] states that many serious accidents, in which human error has been involved, can be attributed to faulty operator decision making In this context, an operator can correctly select the actions but executes them poorly by overcorrecting, losing control, or flipping the commands. This work presents a novel method to assist operators of a remote mobile robot in driving task. The controller is tested from experiences over a virtual environment (Human in the Loop tests), in which a user drives a mobile robot teleoperated in presence of time delay, avoiding obstacles and feeling the force executed by the robot.

Preliminary
Control Scheme Based on Human’s Commands
System Stability Analysis
Experimental Test and Results
Discussions
Conclusions
Full Text
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