Piezoelectric actuator drive method, piezoelectric actuator drive circuit, and piezoelectric actuator drive system

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.

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.