发明授权
US06313564B1 Driving apparatus for vibration type actuator apparatus 有权
振动式致动器装置的驱动装置

Driving apparatus for vibration type actuator apparatus
摘要:
A driving apparatus is provided with an evaluating device for evaluating a wear state in a friction surface between a vibration member and a movable member in a vibration type actuator apparatus. The evaluating device accurately and automatically evaluating the wear state of the friction surface by detecting a fluctuation amount of a driving speed under driving conditions of the vibration type actuator apparatus selected so as to achieve a fixed speed.
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