Being the thrust ripple amendment manner amendment the cyclic

摘要

PROBLEM TO BE SOLVED: To provide a method of correcting a thrust ripple or the like that can suppress a variation in thrust resulting from the thrust ripple by correcting the thrust of a motor.;SOLUTION: An error component at correction by a first preliminary correction value is acquired by a first error acquisition means 101. Next, an error component at correction by a second preliminary correction value is acquired by a second error acquisition means 102. A principal correction value for correcting the thrust ripple is calculated by a principal correction value calculation means 103, on the basis of the error component at the correction by the first preliminary correction value and the error component at the correction by the second preliminary correction value. By this thrust ripple correction method, an error component by a real thrust ripple can effectively be reflected to the calculation of the principal correction value and the principal correction value can be obtained with high accuracy, since the principal correction value for correcting the thrust ripple is calculated, on the basis of the error component at the correction of the first preliminary correction value, and the error component at the correction of the second preliminary correction value. The first preliminary correction value may be zero, and the second preliminary correction value may be a value for correcting the error component at the correction by the first preliminary correction value.;COPYRIGHT: (C)2006,JPO&NCIPI