초록 ▼

In a state in which a load is applied thereto, one tire of one lot of tires is made to contact a drum to which a cleat is mounted, and the drum is rotated. Vertical axial force Fz of the tire is measured by an axial force sensor, and vertical displacement X of a tire axis with respect to a drum surf

In a state in which a load is applied thereto, one tire of one lot of tires is made to contact a drum to which a cleat is mounted, and the drum is rotated. Vertical axial force Fz of the tire is measured by an axial force sensor, and vertical displacement X of a tire axis with respect to a drum surface is measured by a displacement sensor. A transfer characteristic Fz/X is calculated as a vertical dynamic stiffness K(.omega.)) of the tire at a time of rolling. A magnitude and phase of vertical dynamic stiffness K(.omega.) of the tire at a low speed and a magnitude and phase of vertical dynamic stiffness K(.omega.) of the tire at a high speed are stored in a personal computer. The other tires within the same lot are set at a low speed uniformity machine one by one, and low speed RFV and RRO are measured for each tire. Prediction of high speed RFV is carried out based on the measured low speed RFV and RRO, the magnitude and phase of the vertical dynamic stiffness K(.omega.) of the tire at a low speed, and the magnitude and phase of the vertical dynamic stiffness K(.omega.) of the tire at a high speed. Prediction of high speed uniformity in a short time is enabled.

대표청구항 ▼

[ What is claimed is:] [1.] A method for predicting a higher-order component of high speed uniformity of a tire, comprising the steps of:measuring, for one of tires within one lot of tires, a low-speed dynamic stiffness at a frequency corresponding to an order of a higher-order component to be predi

[ What is claimed is:] [1.] A method for predicting a higher-order component of high speed uniformity of a tire, comprising the steps of:measuring, for one of tires within one lot of tires, a low-speed dynamic stiffness at a frequency corresponding to an order of a higher-order component to be predicted when said tire rolls at a low speed, and a high-speed dynamic stiffness at a frequency corresponding to said order when said tire rolls at a high speed;measuring, for each of the tires within the lot of tires, a variation component of load when the tire rolls at a low speed, and a rolling radius variation; andfor each of said tires, predicting, as said higher-order component, a variation component of load during rolling at high, on the basis of said low-speed dynamic stiffness, said high-speed dynamic stiffness, said variation component of load, and said rolling radius variation.