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A Robust Methodology for the Reconstruction of the Vertical Pedestrian-Induced Load from the Registered Body Motion

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Department of Civil Engineering, Structural Mechanics, KU Leuven, B-3001 Leuven, Belgium
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Department of Civil Engineering, Technology Cluster Construction, Structural Mechanics, KU Leuven, B-9000 Ghent, Belgium
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Lauflabor Locomotion Laboratory, Institute of Sport Science, Centre for Cognitive Science Technische Universität Darmstadt, Magdalenenstr. 27, D-64289 Darmstadt, Germany
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Author to whom correspondence should be addressed.
Vibration 2018, 1(2), 250-268; https://doi.org/10.3390/vibration1020018
Received: 4 July 2018 / Revised: 29 October 2018 / Accepted: 31 October 2018 / Published: 7 November 2018
(This article belongs to the Special Issue Vibration Serviceability of Civil Engineering Structures)
This paper proposes a methodology to reconstruct the vertical GRFs from the registered body motion that is reasonably robust against measurement noise. The vertical GRFs are reconstructed from the experimentally identified time-variant pacing rate and a generalised single-step load model available in the literature. The proposed methodology only requires accurately capturing the body motion within the frequency range 1–10 Hz and does not rely on the exact magnitude of the registered signal. The methodology can therefore also be applied when low-cost sensors are used and to minimize the impact of soft-tissue artefacts. In addition, the proposed procedure can be applied regardless of the position of the sensor on the human body, as long as the recorded body motion allows for identifying the time of a nominally identical event in successive walking cycles. The methodology is illustrated by a numerical example and applied to an experimental dataset where the ground reaction forces and the body motion were registered simultaneously. The results show that the proposed methodology allows for arriving at a good estimate of the vertical ground reaction forces. When the impact of soft-tissue artefacts is low, a comparable estimate can be obtained using Newton’s second law of motion. View Full-Text
Keywords: human-induced loading; human-induced vibrations; vibration serviceability; indirect force measurements; motion tracking human-induced loading; human-induced vibrations; vibration serviceability; indirect force measurements; motion tracking
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Van Nimmen, K.; Zhao, G.; Seyfarth, A.; Van den Broeck, P. A Robust Methodology for the Reconstruction of the Vertical Pedestrian-Induced Load from the Registered Body Motion. Vibration 2018, 1, 250-268.

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