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Article

A Multibody Inertial Propulsion Drive with Symmetrically Placed Balls Rotating on Eccentric Trajectories

Doctoral School of Mechanical Engineering, “Eftimie Murgu” University of Resita, 320085 Resita, Romania
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Symmetry 2020, 12(9), 1422; https://doi.org/10.3390/sym12091422
Received: 30 July 2020 / Revised: 24 August 2020 / Accepted: 25 August 2020 / Published: 26 August 2020
(This article belongs to the Special Issue Multibody Systems with Flexible Elements)
Starting with the last century, a lot of enthusiastic researchers have invested significant time and energy in proposing various drives capable to generate linear propulsion force. Regrettably, only a few of these devices passed the patent phase and have been practically materialized. The aim of this paper was to simulate the dynamic behavior of an inertial propulsion drive (IPD) developed by the authors, to demonstrate its functionality. The core of the IPD consists of two symmetric drivers that each performs rotation of eight steel balls on an eccentric path. We propose three solutions for the element which maintain the off-center trajectory of the balls. For the simulation, we used the multibody system approach and determine the evolution of the displacement, velocity, and power consumption. Further, we analyze the collisions between the elements of the system and the influence of this phenomenon on the dynamic behavior of the IPD. We found that collisions generate impact forces which affect the ball acceleration values achieved by simulation. We have concluded that the developed system is capable to generate linear movement. In addition, in terms of velocity and power consumption, the best constructive version of the retaining disk is that which has a cylindrical inner bore placed eccentric relative to the rotation center of the balls. View Full-Text
Keywords: multibody; propulsion drive; linear motion; eccentric trajectory multibody; propulsion drive; linear motion; eccentric trajectory
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MDPI and ACS Style

Gerocs, A.; Gillich, G.-R.; Nedelcu, D.; Korka, Z.-I. A Multibody Inertial Propulsion Drive with Symmetrically Placed Balls Rotating on Eccentric Trajectories. Symmetry 2020, 12, 1422. https://doi.org/10.3390/sym12091422

AMA Style

Gerocs A, Gillich G-R, Nedelcu D, Korka Z-I. A Multibody Inertial Propulsion Drive with Symmetrically Placed Balls Rotating on Eccentric Trajectories. Symmetry. 2020; 12(9):1422. https://doi.org/10.3390/sym12091422

Chicago/Turabian Style

Gerocs, Attila, Gilbert-Rainer Gillich, Dorian Nedelcu, and Zoltan-Iosif Korka. 2020. "A Multibody Inertial Propulsion Drive with Symmetrically Placed Balls Rotating on Eccentric Trajectories" Symmetry 12, no. 9: 1422. https://doi.org/10.3390/sym12091422

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