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- 8Electrical and Computer Engineering, Department of/Journal Articles (Electrical and Computer Engineering)
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A cooperative paradigm for task-space control of multilateral nonlinear teleoperation with bounded inputs and time-varying delays
Download2022-11-03
Amir Zakerimanesh, Farzad Hashemzadeh, Ali Torabi, Mahdi Tavakoli
In this article, a novel multilateral teleoperation structure is presented for cooperative control of a redundant remote robot in the task-space. In the structure, each local robot is assigned a real number between zero and one, as its dominance factor. The sum of all the assigned factors is...
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A Domain-Adapted Machine Learning Approach for Visual Evaluation and Interpretation of Robot-Assisted Surgery Skills
Download2022-01-01
Abed Soleymani, Xingyu Li, Mahdi Tavakoli
In this study, we present an intuitive machine learningbased approach to evaluate and interpret surgical skills level of a participant working with robotic platforms. The proposed method is domain-adapted, i.e., jointly utilizes an end-to-end learning approach for smoothness detection and domain...
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A Low-cost Intrinsically Safe Mechanism for Physical Distancing Between Clinicians and Patients
Download2021-01-01
Abed Soleymani, Ali Torabi, Mahdi Tavakoli
Abed Soleymani, Ali Torabi, Mahdi Tavakoli
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2011-06-21
In a bilateral teleoperation system, conditions involving open-loop model parameters and controller parameters for ensuring teleoperator passivity are useful as control design guidelines to attain maximum teleoperation transparency (due to passivity/transparency tradeoffs). By teleoperator, we...
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2013-01-01
A teleoperation system consists of a teleoperator, a human operator, and a remote environment. Conditions involving system and controller parameters that ensure the teleoperator passivity can serve as control design guidelines to attain maximum teleoperation transparency while maintaining system...
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2013-01-01
Stability of a bilateral teleoperation system may be jeopardized by controller discretization, which has been shown to involve energy leaks. This paper proposes a novel approach to analyzing the absolute stability of sampled-data bilateral teleoperation systems consisting of discrete-time...
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Bilateral Teleoperation System Stability with Non-passive and Strictly-Passive Operator or Environment
Download2015-01-01
A bilateral teleoperation system comprises a human operator, a teleoperator, and an environment. Without exact models for the teleoperator’s terminations (i.e., human operator and the environment), it is typically assumed that they are passive but otherwise arbitrary. Based on this assumption,...
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Controlled synchronization of nonlinear teleoperation in task-space with time-varying delays
Download2022-11-04
Amir Zakerimanesh, Farzad Hashemazdeh, Ali Torabi, Mahdi Tavakoli
This paper introduces a novel control framework for bilateral teleoperation system with the redundant remote robot to ensure the end-effectors’ position tracking while satisfying a sub-task control such as obstacle avoidance in the presence of the nonlinear dynamics for the manipulators and...
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Delay-Robust Nonlinear Control of Bounded-Input Telerobotic Systems with Synchronization Enhancement
Download2022-11-03
Amir Zakerimanesh, Mojtaba Sharifi, Farzad Hashemzadeh, Mahdi Tavakoli
This paper puts forward a novel controller for joint position tracking of bilateral teleoperation systems subjected simultaneously to time-varying communication delays and bounded actuation. Enhancing such systems’ robustness to the larger time delays comes prevalently at the cost of increased...