| 摘要 |
A controlling device for a vibration type actuator including: an AC voltage generating unit in which at least one of parameters, namely a frequency, an amplitude, and a phase of an AC voltage for use in applying an excitation force to a vibrating member is settable; a measuring unit which measures some physical quantities caused by a vibration of the vibrating member; a variation imparting unit which imparts a predetermined variation to at least one of the parameters of the AC voltage; a frequency-response characteristic measuring unit which finds a frequency-response characteristic of at least one predetermined frequency between a first signal according to the variation and a second signal according to the measured physical quantity; and a frequency controlling unit which controls the frequency of the AC voltage according to the frequency-response characteristic.
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