Experimental identification and analysis of the dynamics of a phantom premium 1.5a haptic device

Authors:
Babak Taati;Amir M. Tahmasebi;Keyvan Hashtrudi-Zaad
Affiliations:
Department of Electrical and Computer Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada;School of Computing, Queen's University, Kingston, Ontario K7L3N6, Canada;Department of Electrical and Computer Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada
Venue:
Presence: Teleoperators and Virtual Environments
Year:
2008

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Abstract

The dynamics of a PHANToM Premium 1.5A haptic device from SensAble Technologies, Inc. is experimentally identified and analyzed for different installations of the device and its accessories, such as the typical upright, upside down, with gimbal and counterbalance weight, and with force sensor.1 An earlier formulation of the robot dynamic model is augmented with a friction model, linearly parameterized, and experimentally identified using least squares. The identified dynamics are experimentally evaluated with an inverse dynamics controller and verified by comparing user hand force estimates with the measured values. The contribution of different dynamic terms such as inertial, Coriolis and centrifugal, gravitational, and Coulomb and viscous friction are demonstrated and discussed. The identified model can be used for a variety of haptic applications, such as hand force estimation, accurate active gravity compensation and counterbalance weight determination for various installation conditions, and model-based control for haptic simulation and teleoperation.