| 摘要 |
There are provided a control apparatus for a vibration type actuator and a control method thereof, which are capable of efficiently driving the vibration type actuator regardless of changes in characteristic of the vibration type actuator, in load, and in characteristic of a circuit for generating a periodic signal, thereby minimizing power consumption. The control method includes the steps of detecting a vibration state of an elastic member in the actuator, detecting a phase difference between the periodic signal applied to the actuator or a signal for generating the periodic signal and a detection signal indicating the vibration state, and controlling the frequency and voltage of the periodic signal. The controlling step includes controlling the voltage of the periodic signal based on the detected phase difference.
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