本研究では，まず，室内にてタイヤに高負荷を作用させながら任意方向の摩擦力を負荷可能な走行模擬装置を開発し，スリップ条件下においてタイヤの側面に生じるひずみと，タイヤと接地面との間に作用する鉛直荷重，摩擦力との関係を明らかにした．次に，同結果から，路面摩擦係数を求めるための実験式および測定方法を確立した．実際に様々な接地面に対して負荷方向を変化させ，提案する測定方法によって精度良く測定が可能であることを確認した．さらに，実車における走行実験により路面摩擦係数の測定を行い，時速60km程度までの直進条件下で，幅広いスリップ率，種々の路面状況において，定性的に妥当な測定結果が得られることを確認した
In this study, we first developed a laboratory simulator device that can subject a frictional force in any direction while applying a high load on the tire, and we determined the relationship of the strain on the side of the tire with the vertical load, frictional force acting between the tire and the ground surface under slip conditions. Next, from the above results, experimental formulas and measurement methods were established to determine the road surface friction coefficient. Actually, it was confirmed that the measurement method proposed can accurately measure the friction coefficients of various ground planes in arbitrary directions. Furthermore, the road surface friction coefficient was measured by the experiments on actual vehicle running, and it was confirmed that qualitatively reasonable measurement results were obtained under straight driving conditions up to about 60 km/h for a wide range of slip rates and various road surface conditions.
路面摩擦係数の安定した測定が可能なインテリジェントタイヤおよび走行模擬装置の開発
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TE-PR-TACHIYA-H-kaken 2020-8p.pdf
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