Analysis of wheelchair rugby accelerations with fractal dimensions

Franz Konstantin Fuss; Aleksandar Subic; Julian J. C. Chua

doi:10.1016/j.proeng.2012.04.075

Analysis of wheelchair rugby accelerations with fractal dimensions

Franz Konstantin Fuss, Aleksandar Subic, Julian J. C. Chua

Aston University

Research output: Contribution to journal › Article › peer-review

Abstract

The Hausdorff dimension and the average amplitude of the acceleration signal of a rugby wheelchair during a match
quarter were calculated in order to determine which method is suitable for distinguishing between the different
activities of a rugby wheelchair athlete. The activities were analysed on the match video and identified on the
corresponding acceleration signal, measured with an Apple 4G iPod Touch which was connected to the frame of the
wheelchair. The following activities were identified: collisions, high speed pushing, high speed coasting, low level
activities, and no activity. The Hausdorff dimension values of high speed pushing and high speed coasting were
similar. The average amplitude values of collisions and high speed pushing were similar, as were the values of high
speed coasting and low level activities. Both methods combined provide a 2D map for distinguishing between all five
activities, however, the standard deviation of the average amplitude is too high for clearly separating the activities on
the amplitude scale.

Original language	English
Pages (from-to)	439-442
Number of pages	4
Journal	Procedia Engineering
Volume	34
DOIs	https://doi.org/10.1016/j.proeng.2012.04.075
Publication status	Published - 2012

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abstract = "The Hausdorff dimension and the average amplitude of the acceleration signal of a rugby wheelchair during a matchquarter were calculated in order to determine which method is suitable for distinguishing between the differentactivities of a rugby wheelchair athlete. The activities were analysed on the match video and identified on thecorresponding acceleration signal, measured with an Apple 4G iPod Touch which was connected to the frame of thewheelchair. The following activities were identified: collisions, high speed pushing, high speed coasting, low levelactivities, and no activity. The Hausdorff dimension values of high speed pushing and high speed coasting weresimilar. The average amplitude values of collisions and high speed pushing were similar, as were the values of highspeed coasting and low level activities. Both methods combined provide a 2D map for distinguishing between all fiveactivities, however, the standard deviation of the average amplitude is too high for clearly separating the activities onthe amplitude scale.",

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AU - Subic, Aleksandar

AU - Chua, Julian J. C.

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N2 - The Hausdorff dimension and the average amplitude of the acceleration signal of a rugby wheelchair during a matchquarter were calculated in order to determine which method is suitable for distinguishing between the differentactivities of a rugby wheelchair athlete. The activities were analysed on the match video and identified on thecorresponding acceleration signal, measured with an Apple 4G iPod Touch which was connected to the frame of thewheelchair. The following activities were identified: collisions, high speed pushing, high speed coasting, low levelactivities, and no activity. The Hausdorff dimension values of high speed pushing and high speed coasting weresimilar. The average amplitude values of collisions and high speed pushing were similar, as were the values of highspeed coasting and low level activities. Both methods combined provide a 2D map for distinguishing between all fiveactivities, however, the standard deviation of the average amplitude is too high for clearly separating the activities onthe amplitude scale.

AB - The Hausdorff dimension and the average amplitude of the acceleration signal of a rugby wheelchair during a matchquarter were calculated in order to determine which method is suitable for distinguishing between the differentactivities of a rugby wheelchair athlete. The activities were analysed on the match video and identified on thecorresponding acceleration signal, measured with an Apple 4G iPod Touch which was connected to the frame of thewheelchair. The following activities were identified: collisions, high speed pushing, high speed coasting, low levelactivities, and no activity. The Hausdorff dimension values of high speed pushing and high speed coasting weresimilar. The average amplitude values of collisions and high speed pushing were similar, as were the values of highspeed coasting and low level activities. Both methods combined provide a 2D map for distinguishing between all fiveactivities, however, the standard deviation of the average amplitude is too high for clearly separating the activities onthe amplitude scale.

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Analysis of wheelchair rugby accelerations with fractal dimensions

Abstract

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