TIRE WEAR PERFORMANCE VALUE CALCULATION METHOD, SYSTEM, AND PROGRAM

To provide tire wear performance value calculation method, system and program that can calculate a tire wear performance value taking load fluctuation acting on a tire into consideration.SOLUTION: A plurality of measurement data having accelerations in three directions comprising a cross direction, a longitudinal direction and a vertical direction of a vehicle is acquired, a plurality of travel modes, which are configured from a combination of sections in three directions, are set, the plurality of measurement data is classified into any travel mode of the plurality of travel modes, a travel mode frequency is calculated on the basis of the number of measurement data classified in each travel mode and the number of all travel modes, first friction energy is acquired for each travel mode from the acceleration in the cross direction, the acceleration in the longitudinal direction and a load during resting, the first friction energy is corrected for each travel mode on the basis of the acceleration in the vertical direction and the first friction energy is converted into the second friction energy, and a tire wear performance value is calculated on the basis of the second friction energy and the frequency of each travel mode.SELECTED DRAWING: Figure 3 【課題】タイヤに作用する荷重変動を考慮してタイヤ摩耗性能値を算出可能なタイヤ摩耗性能値の算出方法、システム、及びプログラムを提供する。【解決手段】車両の前後方向、左右方向及び上下方向の３方向の加速度を有する計測データを複数個取得し、３方向の区間の組み合わせで構成される複数の走行モードを設定し、複数個の計測データを複数の走行モードのうちのいずれかの走行モードに分類し、各々の走行モードにおいて分類された計測データの数と全ての計測データ数とに基づいて走行モードの頻度を算出し、各走行モードについて前後方向の加速度、左右方向の加速度及び静止時の荷重から第１摩擦エネルギーを取得し、各走行モードについて上下方向の加速度に基づき第１摩擦エネルギーを補正して第２摩擦エネルギーに第１摩擦エネルギーを変換し、各々の走行モードの第２摩擦エネルギーおよび頻度に基づいてタイヤ摩耗性能値を算出する。【選択図】図３