成果報告書詳細
管理番号20160000000647
タイトル*平成27年度中間年報 SIP(戦略的イノベーション創造プログラム)/革新的設計生産技術 計測融合計算化学を活用したスノースポーツ用品の最適化
公開日2016/8/5
報告書年度2015 - 2015
委託先名国立大学法人東北大学
プロジェクト番号P14030
部署名IoT推進部
和文要約
英文要約1) Optimization of waxes based on measurement integrated computational chemistry
Traditionally, ski waxes are evaluated mainly by comparing the time for gliding on a gentle slope using several sets of test skis, and performing sensory tests based on several indicators. This R&D project suggests that the coefficient of dynamic friction determined from the results of position measurement using GPS should be added to evaluation indicators for wax tests. Beginning of this R&D, an attempt to estimate the coefficient of dynamic friction was made by using commercially available GPS devices; however, none of the devices met our requirements in terms of accuracy, device volume, weight, etc. Therefore, it was determined to develop a GPS by ourselves and eventually we developed a small, high-accuracy GPS featuring dramatically improved characteristics The use of this device during wax tests suggested that the quality and characteristics of each wax can be classified from a new point of view. The results of an evaluation of wax durability by second-to-top-level users showed the possibility to simulate additives suitable for highly durable ski waxes.

(2) Research and development of snowboards based on leading-edge measurement and architectural analysis
Snowboards that differ in length, width, radius, flex and torsion were prototyped. Sensory tests on snow and laboratory tests were performed. Plates whose flex and torsion are adjustable in multiple levels were prototyped and evaluated in laboratory and on snow. Sensory evaluation was performed in terms of the flex, torsion, accuracy and maneuverability through interviews immediately after the test. Compared to commercially available products, the time was equivalent and the sensory evaluation results were better. A guiding principle for the development of snowboards that can be used at major competitions through future improvements.

(3) Research and development of sit-skis based on leading-edge measurement and architectural analysis
An attempt to develop cowls was made. Aerodynamic analysis using CFD was conducted to visualize the state of restraint of airflow stagnation and the existence of a reverse-flow region. Preparations to optimize the shape have been made. Evaluations of cowls having different shapes were performed prototypes and additional parts through wind-tunnel testing. A shape with a CD value improved by 6 percent compared to that without cowls was found.

(4) Research and development of high-accuracy environmental measurement and feedback systems
The small, portable, high-accuracy GPS device that we developed is approximately one-tenth the size and one-eighth the weight of commercially available GPS products and has approximately 300 times higher positioning accuracy. We are considering using this device not only for the evaluation of wax performance, but also for analysis of gliding motions, detailed analysis of loci and application to other sports from the point of view of sports science.
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