on the value of estimating human arm stiffness during virtual teleoperation with robotic manipulators
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ID: 185038
2017
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Abstract
Teleoperated robotic systems are widely spreading in multiple different fields, from hazardous environments exploration to surgery. In teleoperation, users directly manipulate a master device to achieve task execution at the slave robot side; this interaction is fundamental to guarantee both system stability and task execution performance. In this work, we propose a non-disruptive method to study the arm endpoint stiffness. We evaluate how users exploit the kinetic redundancy of the arm to achieve stability and precision during the execution of different tasks with different master devices. Four users were asked to perform two planar trajectories following virtual tasks using both a serial and a parallel link master device. Users' arm kinematics and muscular activation were acquired and combined with a user-specific musculoskeletal model to estimate the joint stiffness. Using the arm kinematic Jacobian, the arm end-point stiffness was derived. The proposed non-disruptive method is capable of estimating the arm endpoint stiffness during the execution of virtual teleoperated tasks. The obtained results are in accordance with the existing literature in human motor control and show, throughout the tested trajectory, a modulation of the arm endpoint stiffness that is affected by task characteristics and hand speed and acceleration.
| Reference Key |
buzzi2017frontierson
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|---|---|
| Authors | ;Jacopo Buzzi;Giancarlo Ferrigno;Joost M. Jansma;Elena De Momi |
| Journal | Journal of enzyme inhibition and medicinal chemistry |
| Year | 2017 |
| DOI |
10.3389/fnins.2017.00528
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| URL | |
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