Piezoelectric actuator drive method, piezoelectric actuator drive circuit, and piezoelectric actuator drive system
AssigneeSony Group Corporation
InventorsHironobu Abe, Masahiro Sato, Hiroya Takenaka
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Abstract
The present invention is a piezoelectric actuator drive method, a piezoelectric actuator drive circuit, and a piezoelectric actuator drive system capable of causing a piezoelectric element to vibrate in a maximum amplitude state. The piezoelectric actuator drive circuit includes: an obtainment unit that obtains operation information pertaining to operation of the piezoelectric element in a period that is a part of one cycle of a drive cycle in which the piezoelectric element is driven; and a control unit that performs feedback control of a drive parameter for driving the piezoelectric element based on the operation information.
Claims16
A piezoelectric actuator drive method, the method comprising:
- obtaining operation information pertaining to operation of a piezoelectric element in a period that is a part of one cycle of a drive cycle in which the piezoelectric element is driven;
- and
- performing feedback control of a drive parameter for driving the piezoelectric element based on the operation information, wherein
- a period from when the force generated by the piezoelectric element is maximum to a point in time of half the drive cycle is the longest period that can be set as the period that is the part.
A piezoelectric actuator drive circuit, the drive circuit comprising:
- an obtainment unit that obtains operation information pertaining to operation of a piezoelectric element in a period that is a part of one cycle of a drive cycle in which the piezoelectric element is driven;
- and
- a control unit that performs feedback control of a drive parameter for driving the piezoelectric element based on the operation information, wherein
- a period from when the force generated by the piezoelectric element is maximum to a point in time of half the drive cycle is the longest period that can be set as the period that is the part.
A piezoelectric actuator drive system, the drive system comprising:
- a piezoelectric element;
- and
- a piezoelectric actuator drive circuit including an obtainment unit that obtains operation information pertaining to operation of the piezoelectric element in a period that is a part of one cycle of a drive cycle in which the piezoelectric element is driven, and a control unit that performs feedback control of a drive parameter for driving the piezoelectric element based on the operation information, wherein
- a period from when the force generated by the piezoelectric element is maximum to a point in time of half the drive cycle is the longest period that can be set as the period that is the part.
Dependencies are inferred from the claim text.