OS0304 Measurement of 3D tire deformation for estimating road condition

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  • MATSUZAKI Ryosuke
    Tokyo University of Science Dept. of Mechanical Engineering
  • HIRAOKA Naoki
    Tokyo Institute of Technology Dept. of Mechanical Sciences and Engineering
  • TODOROKI Akira
    Tokyo Institute of Technology Dept. of Mechanical Sciences and Engineering
  • MIZUTANI Yoshihiro
    Tokyo Institute of Technology Dept. of Mechanical Sciences and Engineering

Bibliographic Information

Other Title
  • OS0304 路面状態推定のためのタイヤの三次元変形計測(OS3-1 ひずみ,OS-3 非破壊評価と構造モニタリング1)

Abstract

From a traffic safety point of view, there is an urgent need for intelligent tires which can optimize braking control by estimating the slip ratio and friction coefficient between road surface and tire. This study develops a concurrent method for estimating the frictional and vertical loads applied to the tires from the measured strain data when both loads change. The method decomposes the measured circumferential strain to the frictional and vertical strain components using their symmetrical and anti-symmetrical characteristics. FEM analysis is used for simulating tire deformation under various wheel loads and braking torques. When the estimated and true applied loads were compared, it was confirmed that the vertical and frictional loads can be estimated independently from the circumferential strain with sufficient accuracy.

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