Moving member control apparatus and imaging apparatus incorporating the same

摘要

The present invention relates to a moving member control apparatus that makes sure unerring control of a moving member having an ill-balanced structure and an imaging apparatus that incorporates that control apparatus.

主权项

1. A moving member control apparatus comprising:
a fixed base; a moving part configured to be relatively movable with respect to the fixed base; a first actuator configured to apply driving force to the moving part; a second actuator configured to apply driving force to the moving part; a first position detector configured to detect a real position of the first actuator; a second position detector configured to detect a real position of the second actuator; a control circuit that:
gives an instruction of a first target displacement position to the first actuator about a displacement position;gives an instruction of a second target displacement position to the second actuator about a displacement position;calculates a first deviation between the first target displacement position and a real position detected by the first position detector;calculates a second deviation between the second target displacement position and a real position detected by the second position detector;produces a first correction signal and a second correction signal corrected for the first deviation and the second deviation, respectively, depending on a difference between the first deviation and the second deviation, and predetermined first and second correction coefficients based on relations between a first distance from the center of gravity of the moving part to the first position detector and a second distance from the center of gravity of the moving part to the second position detector; andcontrols driving forces of the first actuator and the second actuator based on the first correction signal and the second correction signal, respectively.