| 摘要 |
A movable body apparatus includes a vibratory system, a vibration detecting portion, a driving portion, and a controlling portion. The vibratory system has a resonance frequency and a movable body capable of being reciprocally and rotatably vibrated. The vibration detecting portion detects a vibration condition of the movable body. The driving portion drives the vibratory system with a drive signal. The controlling portion regulates the drive signal supplied to the driving portion. The controlling portion regulates a driving frequency of the drive signal so that a delay phase difference between the drive phase of the drive signal and the vibration phase of the vibratory system obtained from detection result of the vibration detecting portion, both obtained when the vibratory system is vibrated at a predetermined frequency, is maintained.
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