Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
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Jung, A; Müller, W; Staat, M.
Optimization of the flight technique in ski jumping: The influence of wind.
J Biomech. 2019; 88(7):190-193
Doi: 10.1016/j.jbiomech.2019.03.023
Web of Science
PubMed
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- Führende Autor*innen der Med Uni Graz
- Jung Alexander
- Co-Autor*innen der Med Uni Graz
- Müller Wolfram
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- Abstract:
- Ski jumping performance is strongly affected by wind. Flight technique optimization for maximizing jump length is a highly complex motor-control task that also depends on the wind. Pontryagin's minimum principle was used in this study to gain a better understanding on how wind influences flight technique optimization. Optimum time courses of the angle of attack α of the skis and of the body-to-ski angle β were computed for seven realistic wind scenarios on the large hill and on the flying hill. The optimum values of α were smaller at headwind, and larger at tailwind when compared to the optimum time course at calm wind. The optimum values of β were the smallest possible ones at the given flight technique constraints, except for the last part of the flight. Optimum adjustments of α increased the jump lengths between 0 and 1.8 m on the large hill, and between 0 and 6.4 m on the flying hill. Maximum jump length increases were achieved at the highest headwind speed. Even larger jump length effects can be achieved by using smaller β-angles, which might be possible in headwind conditions, but this is associated with increased problems to keep the flight stable. Copyright © 2019 Elsevier Ltd. All rights reserved.
- Find related publications in this database (Keywords)
- Ski flying
- Computer simulation
- Optimal control
- Sport aerodynamics
- Winter sports