A technique for time-jerk optimal planning of robot trajectories

Authors:
Alessandro Gasparetto;Vanni Zanotto
Affiliations:
Dipartimento di Ingegneria Elettrica, Gestionale e Meccanica, Universití di Udine, Via delle Scienze 208, 33100 Udine, Italy;Dipartimento di Ingegneria Elettrica, Gestionale e Meccanica, Universití di Udine, Via delle Scienze 208, 33100 Udine, Italy
Venue:
Robotics and Computer-Integrated Manufacturing
Year:
2008

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Abstract

A technique for optimal trajectory planning of robot manipulators is presented in this paper. In order to get the optimal trajectory, an objective function composed of two terms is minimized: a first term proportional to the total execution time and another one proportional to the integral of the squared jerk (defined as the derivative of the acceleration) along the trajectory. This latter term ensures that the resulting trajectory is smooth enough. The proposed technique enables one to take into account kinematic constraints on the robot motion, expressed as upper bounds on the absolute values of velocity, acceleration and jerk. Moreover, it does not require the total execution time of the trajectory to be set a priori. The algorithm has been tested in simulation yielding good results, also in comparison with those provided by another important trajectory planning technique.