成果報告書詳細
管理番号20150000000422
タイトル*平成26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2015/7/18
報告書年度2014 - 2014
委託先名国立大学法人東北大学
プロジェクト番号P14030
部署名ロボット・機械システム部
和文要約
英文要約SIP (Cross-Ministerial Strategic Innovation Promotion Program) / Innovative Design/Manufacturing Technologies,
Optimization of Snow Sports Equipment Utilizing Measurement Integrated Computational Chemistry (FY2014-FY2015) FY2014 Annual Report

(1) Requirements of waxes from the athletes' point of view are high in sliding performances (low friction performance and water-repellent property) and persistence (permeability). The main raw materials for waxes are broadly classified into hydrocarbons, fluorocarbons and solid lubricants. The comparison results of analysis using a simulator and devices on the permeability of several fluorocarbons in ultrahigh molecular weight polyethylene, which is the main raw material for the sliding surface, showed a strong agreement. The effectiveness of the newly developed simulator was proven. In the future, we will look for a candidate fluorocarbon compound with permeability equivalent to hydrocarbon.

(2) Regarding snowboards, the flexural rigidity when turning on snow was assessed with a strain gauge. Also, the torsional rigidity was assessed on snow. The static characteristics assessment system in the laboratory was developed to measure flexural rigidity, torsional rigidity and vibration damping characteristics. In the future, we will secure the consistency of the sensory test results in the field and results in the laboratory to establish numerical values for the development of snowboard products.

(3) Components specific to sit-skis are the main frame, the bucket seat, outriggers, suspensions and the cowl (windshield). In this SIP, a consensus that the development of cowls, which have not been used by Japan's national team, was formed among the parties concerned. In the downhill equivalent, shortening the time by one second when cowls are used was set as a tentative target. For the reason of weight saving, a prototype was made from carbon-fiber-reinforced plastic (CFRP) and was assessed on the snow in late March. It was assumed that the cowl shortened the time for schussing a course of approximately 400 meters by 0.1 to 0.3 seconds. Since the snow conditions significantly changed during the test, rendering the appropriate assessment impossible, in the future, we will examine and optimize the cowl design.

(4) We started to establish an estimating system for the coefficient of kinetic friction (-k) at the time of sliding on snow surfaces. As an ideal system, we will aim to build a sensor fusion system in which a high-accuracy GPS and other sensors are combined. In this fiscal year, as a preliminary experiment, we tried to estimate -k using GPS for mountain climbing based only on information on positioning and the altitude at the time of sliding on snow slope. From the data when a gentle slope approximately 80 meters long was schussed, we obtained an estimated value of  -k = 0.0562. In the future, we will examine the accuracy of the measurement.

(5) To build a motion analysis system with a high-accuracy GPS, we started the development of methods for location information processing and kinetic data calibration.
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