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      City bus seat vibration analysis using 6-axis accelerometer and gyroscope sensors

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          Abstract

          This paper analyses different modes and cycles of seat vibration in city buses by analysing acceleration peak magnitudes and their trends and fluctuations in the time domain. The purpose is to find peak vibration modes that exist in the driving patterns of city buses. Analysing peaks in a time series is essential for many applications specifically in vibration analysis because they represent significant events. Using a 6-axis inertial measurement unit device which has accelerometer and gyroscope sensors data were collected from a number of city buses operating. By applying algorithmic filters the g-force peaks present in different acceleration modes were analysed. The particularity of city bus seat vibration and g-force acceleration levels due to effective acceleration in 3-axes are presented and discussed, namely: longitudinal (forward motion), lateral (side-to-side) and vertical (bounce mode) accelerations. It was found that the bus seat root mean square acceleration magnitude of approximately 0.33 g occurred from the major acceleration cycles during bus running. In longitudinal, lateral and vertical directions, 20% of peak acceleration cycles were above 0.20 g, 0.18 g and 0.27 g respectively. Jerk may be a better indicator of passenger discomfort. The results from this study can provide future reference to research directions into understanding city bus seat vibration levels in longitudinal, lateral and vertical directions and also initiatives to mitigate excess bus seat vibration for the riders.

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          The prevalence of musculoskeletal troubles among car drivers.

          In order to explore the relationship between car driving and musculoskeletal troubles, a cross-sectional structured-interview survey of low- to high-mileage drivers (including individuals who drove as part of their job) was conducted based on the Nordic Musculoskeletal Questionnaire. The results clearly showed that exposure to car driving was associated with reported sickness absence due to low back trouble and that those who drive as part of their job appear to be more at risk from low back trouble than those whose jobs primarily involve sitting (not driving) and standing activities. The frequency of reported discomfort also increased with higher annual mileage. In addition, drivers of cars with more adjustable driving packages had fewer reported musculoskeletal troubles. This identifies an urgent need for the training of managers of fleet vehicles in the importance of developing measures to reduce this problem, for example, the selection of an individual's car with respect to comfort and postural criteria.
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            Driving Behavior and Traffic Safety: An Acceleration-Based Safety Evaluation Procedure for Smartphones

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              Beyond velocity and acceleration: jerk, snap and higher derivatives

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                Author and article information

                Contributors
                md.i.hossain@alumni.uts.edu.au
                Journal
                Sci Rep
                Sci Rep
                Scientific Reports
                Nature Publishing Group UK (London )
                2045-2322
                2 December 2024
                2 December 2024
                2024
                : 14
                : 29865
                Affiliations
                Faculty of Engineering and Information Technology, University of Technology Sydney, ( https://ror.org/03f0f6041) Sydney, 2007 Australia
                Article
                80804
                10.1038/s41598-024-80804-5
                11612474
                39622902
                5aa38192-5fb2-4c59-8159-24ca0d35217a
                © The Author(s) 2024

                Open Access This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by-nc-nd/4.0/.

                History
                : 31 July 2024
                : 21 November 2024
                Categories
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                © Springer Nature Limited 2024

                Uncategorized
                bus seat vibration,vehicle vibration analysis,g-force,jerk,bus running,transport system comfort,motion sickness,mechanical engineering,applied physics

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