METHOD FOR ESTIMATING RRO GROWTH AMOUNT, METHOD FOR ESTIMATING RRO AFTER BREAK-IN, METHOD FOR ESTIMATING RRO GROWTH AMOUNT AFTER BREAK-IN ARISING FROM RISE IN NUMBER OF REVOLUTIONS, METHOD FOR ESTIMATING RFV GROWTH AMOUNT, METHOD FOR ESTIMATING RFV AFTER BREAK-IN, METHOD FOR ESTIMATING AVV GROWTH AMOUNT, AND METHOD FOR ESTIMATING AVV AFTER BREAK-IN

摘要

PPROBLEM TO BE SOLVED: To provide a method for estimating RRO growth amount, a method for estimating RRO after break-in, a method for estimating RRO growth amount after break-in arising from rise in the number of revolutions, a method for estimating RFV growth amount, a method for estimating RFV after break-in, a method for estimating AVV growth amount, and a method for estimating AVV after break-in, capable of precisely performing uniformity inspection even when the time required in uniformity measurement is shortened. PSOLUTION: A tire to be subjected to RRO measurement is rotated around a tire central shaft plural times, and a plurality of RRO measurement values are acquired for a specific part of the tire. On the basis of the plurality of RRO measurement values acquired, an approximation expression (1) providing RRO growth amount estimation value due to secular change is obtained by a least-squares method. Accordingly, the RRO growth amount estimation value associated with secular change is easily obtained in a short time. PCOPYRIGHT: (C)2007,JPO&INPIT