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ir. J.J. de Jong PDEng (Jan)

PhD Candidate

About Me

Research
IN-BALANCE - Cycle time reduction of commercial robots require faster robots without compromising the accuracy. Higher velocities and acceleration also increases the reaction force and moments at the base which in turn lead to undesired base vibrations. These vibrations reduce the accuracy of the end-effector and therefore require waiting times to let the vibrations dampen out. Dynamic balancing aims to distribute the mass of the mechanism such that these shaking forces and moments are eliminated. Considering dynamic balance at the beginning of the design process and the use of parallel mechanisms can reduce the complexity and added inertia of the balancing solution.

Interests
Dynamic balance, parallel robotics, kinematics, screw theory, control, mechanical design, medical robotics, vision systems.

Previous projects
DESIGN OF A ROBOT FOR TMS DURING TREADMILL WALKING - A novel robot has been designed for the application of Transcranial magnetic stimulation (TMS) during motion therapies such as treadmill walking. As the velocity of the head during treadmill walking exceeds the velocity safety limits of conventional TMS robots, a novel robot design is required that combines high velocity with intrinsic safety.

Side projects
- Plot2LaTeX Exports a figure as a pdf file in vector format for inclusion into LaTeX.

Expertise

Derivatives
Inertia
Kinematics
Decomposition
Equivalence
Robotics
Robots
Three Term Control Systems

Research

Dynamic Balance
Cycle time reduction of commercial robots require faster robots without compromising the accuracy. Higher velocities and acceleration also increases the reaction force and moments at the base which in turn lead to undesired base vibrations. These vibrations reduce the accuracy of the end-effector and therefore require waiting times to let the vibrations dampen out. Dynamic balancing aims to distribute the mass of the mechanism such that these shaking forces and moments are eliminated. Considering dynamic balance at the beginning of the design process and the use of parallel mechanisms can reduce the complexity and added inertia of the balancing solution.

Publications

Recent
de Jong, J. J., Müller, A., van Dijk, J., & Herder, J. L. (2018). Differentiation-free taylor approximation of finite motion in closed loop kinematics. In S. Zeghloul, L. Romdhane, & M. Amine Laribi (Eds.), Computational Kinematics: Proceedings of the 7th International Workshop on Computational Kinematics, 2017 (pp. 577-584). (Mechanisms and Machine Science; Vol. 50). Springer Netherlands. DOI: 10.1007/978-3-319-60867-9_66
de Jong, J. J., van Dijk, J., & Herder, J. L. (2017). On the dynamic equivalence of planar mechanisms, an inertia decompositon method. In P. Wenger, & P. Flores (Eds.), New Trends in Mechanism and Machine Science: Theory and Industrial Applications (pp. 51-59). (Mechanisms and Machine Science; Vol. 43). Nantes, France: Springer International Publishing. DOI: 10.1007/978-3-319-44156-6
de Jong, J. J., van Dijk, J., & Herder, J. L. (2016). A screw-based dynamic balancing approach, applied to a 5-bar mechanism. In J. Lenarcic, & J-P. Merlet (Eds.), Proceedings of the ARK2016, the 15th Conference Advances in Robot Kinematics (pp. 31-38). IFToMM. DOI: 10.1007/978-3-319-56802-7_4
de Jong, J. J., van Dijk, J., & Herder, J. L. (2016). On the dynamic equivalence of planar mechanisms: An inertia decomposition method. In P. Wenger, & P. Flores (Eds.), New Trends in Mechanism and Machine Science: Theory and Industrial Applications (Vol. 43, pp. 51-59). Nantes, France: Springer.

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Contact Details

Visiting Address

University of Twente
Faculty of Engineering Technology
Horst - Ring (building no. 21), room N-152
De Horst 2
7522LW  Enschede
The Netherlands

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Mailing Address

University of Twente
Faculty of Engineering Technology
Horst - Ring  N-152
P.O. Box 217
7500 AE Enschede
The Netherlands