Abstract
In recent years, intelligent tires are under developing, and it is expected to detect road condition using intelligent tires from a traffic safety point of view. By detecting the coefficient of friction of road where you drive a car, we expect to enhance vehicle braking performance (ABS). The detection of road surface condition using one-axis acceleration meter had been conducted previously. However there is disadvantage not being able to measure lateral force, while in a corner. In the present study, we propose that the coefficient of friction, lateral force, slip angle, and contact patch length are estimated using the triaxial acceleration meter attached on the inner surface of a tire. We conducted tire rotation tests with various slip angle and measures a triaxial acceleration during the tests. It was found that it was possible to estimate lateral force, coefficient of friction by triaxial acceleration meter accurately, and we demonstrated the validity of estimating methods of lateral force and coefficient of friction.
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