Vibration-reducing modelling of a mecanum wheel based on equivalent stiffness and strength analysis

Abstract

The mecanum wheel-chair offers unparalleled manoeuverability due to its ability to move in any direction by independently rotating its wheels. However, this innovation, characterized by hub and rollers, brings along a set of challenges, including vertical vibrations induced by successive roller-ground contacts. This manuscript presents a comprehensive investigation into the dynamic features and vertical vibration characteristics of mecanum wheels. Our study focuses on understanding the impact of roller curvature on vertical vibrations. To achieve this, authors employed top-to-top and quadratic mean values of accelerations and displacements. Additionally, authors described the results of a vertical vibration simulation conducted in SolidWorks. A key element of our research involves the implementation of a spring mechanism within the mecanum wheel's centre to dampen vibrations. Through systematic experimentation and analysis, authors determined the optimal geometric arrangement for minimizing vertical vibrations. Our findings reveal a superior design approach for reducing wheel vibrations and enhancing manoeuverability. By addressing this important issue, authors contribute to the advancement of mecanum wheel technology, making it more efficient and practical for a wide range of applications. Specifically, our results demonstrate an impressive 99.98% reduction in vertical vibrations, marking a significant improvement in the mecanum wheel-chair's efficiency and enhancement in wheel efficiency.