@article {4205, title = {A wearable wrist haptic display for motion tracking and force feedback in the operational space}, journal = {Wearable Technologies}, volume = {2}, year = {2021}, author = {Laghi, Marco and Catalano, Manuel G and Grioli, Giorgio and Bicchi, Antonio} } @article {3760, title = {Unifying bilateral teleoperation and tele-impedance for enhanced user experience}, journal = {International Journal of Robotics Research}, year = {2019}, month = {12/2019}, type = {Journal}, abstract = {

Usability is one of the most important aspects of teleoperation. Ideally, the operator{\textquoteright}s experience should be one of complete command over the remote environment, but also be as close as possible to what s/he would have if physically present at the remote end - i.e. transparency in terms of both action and perception. These two aspects may coincide in favorable conditions, where classic approaches such as the four-channel architecture ensures transparency of the control framework. In presence of substantial delays between the user and the slave, however, the stability-performance trade-off inherent to bilateral teleoperation deteriorates not only transparency, but also command. An alternative, unilateral approach is given by tele-impedance, which controls the slave-environment interaction by measuring and remotely replicating the user{\textquoteright}s limb endpoint position and impedance. Not including force feedback to the operator, tele-impedance is absolutely robust to delays, while it completely lacks transparency.

This paper introduces a novel control framework which integrates a new, fully transparent, two-channel bilateral architecture with the tele-impedance paradigm. The result is a unified solution that mitigates problems of classical approaches, and provides the user with additional tools to modulate the slave robot{\textquoteright}s physical interaction behavior, resulting in a better operator experience in spite of time inconsistencies. The validity and effectiveness of the proposed solution is demonstrated in terms of performance in the interaction tasks, of user fatigue and overall experience.

}, keywords = {bilateral, stability, Teleoperation, transparency, usability}, doi = {10.1177/0278364919891773}, url = {https://journals.sagepub.com/doi/10.1177/0278364919891773}, author = {Laghi, Marco and Ajoudani, Arash and Catalano, Manuel G. and Bicchi, Antonio} } @conference {3761, title = {Shared-autonomy control for intuitive bimanual tele-manipulation}, booktitle = {2018 IEEE-RAS 18th International Conference on Humanoid Robots (Humanoids)}, year = {2018}, pages = {1{\textendash}9}, publisher = {IEEE}, organization = {IEEE}, abstract = {

Existing dual-arm teleoperation systems function on one-to-one coupling of the human and robotic arms to fully exploit the user{\textquoteright}s dexterity during bimanual tele-manipulation. While the individual coordination of the robot end-effectors can be necessary for complex and asymmetric tasks, it may result in a cumbersome user experience during symmetric bimanual tasks (e.g. manipulating and carrying objects). In this paper we propose a novel framework that includes the one-to-one direct control and a new shared autonomy strategy. The user can autonomously choose between the two, and if the new one is selected the robots move in a coordinated way, in which desired positions are extrapolated from the movements and gestures of just one users arm. These gesture commands are interpreted and handled by the control, with the purpose of unloading the users cognitive burden. Lastly, the tele-impedance paradigm, i.e., the remote control of robot impedance and position references, is applied to both controls, to improve remote physical interaction performances. The paper reports on the overall proposed architecture, its implementation and its preliminary validation trough a multi subject experimental campaign.

}, doi = {10.1109/HUMANOIDS.2018.8625047}, url = {https://ieeexplore.ieee.org/abstract/document/8625047}, author = {Laghi, Marco and Maimeri, Michele and Marchand, Mathieu and Leparoux, Clara and Catalano, Manuel and Ajoudani, Arash and Bicchi, Antonio} }