Dynamics and Optimized Torque Distribution Based Force/position Hybrid Control of a 4-DOF Redundantly Actuated Parallel Robot with Two Point-contact Constraints
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A 4-DOF redundantly actuated parallel robot (RAPR) for jaw movement achieved by adding two point-contact constraints (higher-kinematic-pairs, HKPs) is presented. The inverse dynamics and driving force optimization model based on pseudo-inverse method are established. In order to overcome the disequilibrium of driving forces of the redundant chains caused by inclusion of point-contact constraints, an optimized torque distribution based force/position hybrid control (OTDFP control) method for trajectory tracking is proposed for this RAPR. Experiments are carried out to evaluate the OTDFP control. Comparison with the conventional position control is performed, showing that the OTDFP control can reduce torque fluctuation and tracking errors of the RAPR. The chewing experiment of silicone shows the RAPR is not only able to track mandibular movement, but also able to emulate chewing force and temporomandibular joint (TMJ) force under the OTDFP control.
KeywordsDynamics force/position hybrid control point-contact constraints redundant actuation torque distribution
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- A. Mueller, “Redundant actuation of parallel manipulators,” Parallel Manipulators, towards New Applications, I-Tech Education and Publishing, Vienna, Austria, 2008.Google Scholar
- F. Marquet, S. Krut, O. Company, and F. Pierrot, “ARCHI: a redundant mechanism for machining with unlimited rotation capacities,” Proc. IEEE Int. Conf. Robot. Autom., Budapest, Hungary, pp. 683–689, Aug. 22–25, 2001.Google Scholar
- A. Shintemirov, A. Niyetkaliyev, and M. Rubagotti, “Numerical optimal control of a spherical parallel manipulator based on unique kinematic solutions,” IEEE/ASME Trans. Mechatronics, vol. 21, no. 1, pp. 98–109, February 2016.Google Scholar
- Y. Zhang, S. Cong, W.-W. Shang, Z.-X. Li, and S.-L. Jiang, “Modeling, identification and control of a redundant planar 2-DOF parallel manipulator,” International Journal of Control, Automation and Systems, vol. 5, no. 5, pp. 559–569, October 2007.Google Scholar
- F. Marquet, O. Company, S. Krut, O. Gascuel, and F. Pierrot, “Control of a 3-DOF over-actuated parallel mechanism,” Proc. Int. Des. Eng. Tech. Conf. & Comp. Inf. Eng. Conf., Montreal, Quebec, Canada, pp. 1185–1191, Sep. 29–Oct. 2, 2002.Google Scholar
- A. Muller, “Stiffness control of redundantly actuated parallel manipulators,” Proc. of IEEE Int. Conf. Robot. Autom., Orlando, Florida, USA, pp. 1153–1158, May. 15–19, 2006.Google Scholar
- S. J. Nelson, Wheeler’s Dental Anatomy Physiology and Occlusion, Elsevier Healthe Sciences, 2014.Google Scholar
- R. Mac, Ausland, “The Moore-Penrose Inverse and Least Squares,” Math 420: Advanced Topics in Linear Algebra, pp. 1–10, 2014.Google Scholar