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  • Title: Control system design of a 3-DOF upper limbs rehabilitation robot.
    Author: Denève A, Moughamir S, Afilal L, Zaytoon J.
    Journal: Comput Methods Programs Biomed; 2008 Feb; 89(2):202-14. PubMed ID: 17881080.
    Abstract:
    This paper presents the control system design of a rehabilitation and training robot for the upper limbs. Based on a hierarchical structure, this control system allows the execution of sequence of switching control laws (position, force, impedance and force/impedance) corresponding to the required training configuration. A model-based nonlinear controller is used to impose the desired environment to the patient's arm. The knowledge of robot kinematics and dynamics is thus necessary to ensure haptic transparency and patient safety. The identification process of robot dynamics is emphasised and experimental identification results are given for the designed robot. The paper also presents a particular rehabilitation mode named Active-Assisted. Simulation results of this rehabilitation mode illustrate the potentialities of the overall control scheme, which can also be applied to other rehabilitation robots.
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