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Dual Control for Jerk-Driven Robotics in Rehabilitative Planar Applications

Department of Mechanical and Industrial Engineering, University of Brescia, via Branze, 38, 25123 Brescia, Italy
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Micromachines 2020, 11(2), 141; https://doi.org/10.3390/mi11020141
Received: 13 December 2019 / Revised: 17 January 2020 / Accepted: 23 January 2020 / Published: 28 January 2020
This study compares a set of strategies to plan and control the trajectory of a robotic device in a planar workspace. These strategies are based on an affective application of jerk-laws able to indicate undesirable conditions (e.g., vibrations) facilitating the device control. The jerk is the time derivative of acceleration, and this solution provides an indirect means to control the variation rate of the actuator torques, while avoiding the complex robot dynamic models and their algorithms for computing the dynamics. In order to obtain a smooth trajectory, a regulator to control a robotic device has been developed and validated. It consists of the implementation of two control modules able to i) generate the predefined trajectory and ii) guarantee the path tracking, reducing unwanted effects. In this case a simple S-shaped path has been originated by the “trajectory generator module” as a reference movement to rehabilitate upper limb functionality. The numerical simulation and the results of preliminary tests show the efficacy of the proposed approach through the vibration smoothness appraisal associated with the motion profile.
Keywords: vibration; robotics; trajectory; jerk vibration; robotics; trajectory; jerk
MDPI and ACS Style

Aggogeri, F.; Amici, C.; Pellegrini, N. Dual Control for Jerk-Driven Robotics in Rehabilitative Planar Applications. Micromachines 2020, 11, 141.

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