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An Influence of the Material Properties on the Endurance of the Self-Adjustable Rocker-Bogie Suspension

K. Sokół M. Pierzgalski
Archives of Metallurgy and Materials | 2021 | vol. 66 | No 2 | 543-548 | DOI: 10.24425/amm.2021.135891
Keywords rocker-boogie suspension rover mobile platform FEM analysis
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Abstract

In this paper one presents the new concept of a rocker-bogie suspension where the suspension members can change their length. As a result of this action the frame with suspension is able to adjust to the specific environmental conditions. The main problem with the designed suspension system is a fact that with an extension of the suspension members their slenderness increases as well as final displacements. The solution of this problem is not so simple because the construction must meet the specific requirements due to participation of the mobile platform in different competitions. In the presented results of numerical simulations one shows an influence of the different materials on stress and displacements magnitudes of suspension members when the mobile platform hits an obstacle. This situation allows one to test different engineering solutions in the worst case scenario when suspension elements may be damaged. Finally the optimum design is presented.
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Authors and Affiliations

K. Sokół
1
ORCID: ORCID
M. Pierzgalski
1
ORCID: ORCID
  1. Czestochowa University of Technology , Department of Mechanics and Machine Design Foundations , 73 Dąbrowskiego Str., 42-201 Częstochowa, Poland

Investigations on an influence of the material properties on vibrations of active rocker-bogie suspension

Krzysztof Sokół Maciej Pierzgalski
Bulletin of the Polish Academy of Sciences Technical Sciences | 2022 | 70 | 1 | e138239 | DOI: 10.24425/bpasts.2021.138239
Keywords frequency analysis suspension rover mobile platform computational mechanics
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Abstract

Unmanned vehicles are often used in everyday life, mostly by rescue teams or scientists exploring new terrains. In those constructions, the suspension has constant dimensions, which leads to many disadvantages and limits the application area. The solution to these problems can be creating a six-wheeled mobile platform that can dynamically change the wheelbase in relation to the area of action or terrain inclination angle. The active change in location of the center of gravity gives a possibility to access sloppy obstacles not available with classical suspensions. The main scope of this study is to investigate the influence of material properties on vibration frequency at different lengths of suspension members. The obtained results will allow finding the optimum material for producing a prototype unit.
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Bibliography

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Authors and Affiliations

Krzysztof Sokół
1
ORCID: ORCID
Maciej Pierzgalski
1
ORCID: ORCID
  1. Institute of Mechanic and Machine Design Foundations, Czestochowa University of Technology, Czestochowa, Poland

A little more about H. Elzenberg’s polemic with Cz. Milosz and "The Rover" by J. Conrad

Bogusław Wolniewicz Jan Zubelewicz
Przegląd Filozoficzny. Nowa Seria | 2018 | No 3 | 37-43 | DOI: 10.24425/pfns.2018.125450
Keywords duty internal voice motivation Cz. Miłosz H. Elzenberg J. Conrad’s “The Rover”
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Abstract

This work is complementary with Bogusław Wolniewicz’s text Elzenberg about Milosz. The circumstances surrounding the discovery of Czesław Milosz’s article Duty and Henryk Elzenberg’s polemic are portrayed here. Moreover, in the second part we have attempted to evaluate Joseph Conrad’s novel The Rover.

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Authors and Affiliations

Bogusław Wolniewicz
Jan Zubelewicz

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