| 摘要 |
The present invention involves: an information acquisition step for acquiring information pertaining to the rotational speed, braking-driving force, slip angle, and generated lateral force of a tire; a correlation strength calculation step for calculating a first correlation strength between the rotational speed and the braking-driving force from information pertaining to the rotational speed and information pertaining to the braking-driving force which were obtained in the information acquisition step, and for calculating a second correlation strength between the slip angle and the generated lateral force from information pertaining to the slip angle and information pertaining to the generated lateral force which were obtained in the information acquisition step; a change detection step for detecting whether the first correlation strength calculated in the correlation strength calculation step increased or decreased by a first threshold value or above relative to a predetermined first reference value, and for detecting whether the second correlation strength calculated in the correlation strength calculation step increased or decreased by a second threshold value or above relative to a predetermined second reference value; and an estimation step for estimating at least two of the following states on the basis of the detection results of the change detection step, the states being the state of the ground to which the tire comes into contact, the state of the internal pressure of the tire, and the state of wear of the tire. |
