Ski jumping flight skill analysis based on high-speed video image

Masahide Murakamia; Masato Iwase; Kazuya Seo; Yuji Ohgi; Reno Koyanagi

doi:10.1016/j.proeng.2010.04.003

Ski jumping flight skill analysis based on high-speed video image

Masahide Murakamia, Masato Iwase, Kazuya Seo, Yuji Ohgi, Reno Koyanagi

政策･メディア研究科

研究成果: Article › 査読

7 被引用数 (Scopus)

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Mages of the initial 40 m part of a flight of 120-m ski jumping were recorded by a fixed high-speed video camera in Hakuba Ski Jumping Stadium. The time variations of the forward leaning angle and the ski angle of attack were measured from the video image and the aerodynamic forces were calculated from kinematic data. Some correlations were investigated between the reduced jumping distance D_r, which is an initial speed corrected flight distance, and some key angles and the initial transition time, as well as those between D_r and the aerodynamic force coefficients. Jumping performance is compared between advanced jumpers and beginner jumpers.

本文言語	English
ページ（範囲）	2381-2386
ページ数	6
ジャーナル	Procedia Engineering
巻	2
号	2
DOI	https://doi.org/10.1016/j.proeng.2010.04.003
出版ステータス	Published - 2010 6月

ASJC Scopus subject areas

工学（全般）

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10.1016/j.proeng.2010.04.003

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title = "Ski jumping flight skill analysis based on high-speed video image",

abstract = "Mages of the initial 40 m part of a flight of 120-m ski jumping were recorded by a fixed high-speed video camera in Hakuba Ski Jumping Stadium. The time variations of the forward leaning angle and the ski angle of attack were measured from the video image and the aerodynamic forces were calculated from kinematic data. Some correlations were investigated between the reduced jumping distance Dr, which is an initial speed corrected flight distance, and some key angles and the initial transition time, as well as those between Dr and the aerodynamic force coefficients. Jumping performance is compared between advanced jumpers and beginner jumpers.",

keywords = "Aerodynamic force coefficients, Flight distance, Image analysis, Jumper posture, Ski jumping",

author = "Masahide Murakamia and Masato Iwase and Kazuya Seo and Yuji Ohgi and Reno Koyanagi",

note = "Funding Information: This research was financially supported by the Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (19650167).",

year = "2010",

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doi = "10.1016/j.proeng.2010.04.003",

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T1 - Ski jumping flight skill analysis based on high-speed video image

AU - Murakamia, Masahide

AU - Iwase, Masato

AU - Seo, Kazuya

AU - Ohgi, Yuji

AU - Koyanagi, Reno

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N2 - Mages of the initial 40 m part of a flight of 120-m ski jumping were recorded by a fixed high-speed video camera in Hakuba Ski Jumping Stadium. The time variations of the forward leaning angle and the ski angle of attack were measured from the video image and the aerodynamic forces were calculated from kinematic data. Some correlations were investigated between the reduced jumping distance Dr, which is an initial speed corrected flight distance, and some key angles and the initial transition time, as well as those between Dr and the aerodynamic force coefficients. Jumping performance is compared between advanced jumpers and beginner jumpers.

AB - Mages of the initial 40 m part of a flight of 120-m ski jumping were recorded by a fixed high-speed video camera in Hakuba Ski Jumping Stadium. The time variations of the forward leaning angle and the ski angle of attack were measured from the video image and the aerodynamic forces were calculated from kinematic data. Some correlations were investigated between the reduced jumping distance Dr, which is an initial speed corrected flight distance, and some key angles and the initial transition time, as well as those between Dr and the aerodynamic force coefficients. Jumping performance is compared between advanced jumpers and beginner jumpers.

KW - Aerodynamic force coefficients

KW - Flight distance

KW - Image analysis

KW - Jumper posture

KW - Ski jumping

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Ski jumping flight skill analysis based on high-speed video image

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