Patent ID: 9052614
Filing Date: 2015-06-09
Classification: F16F,G03F,H01J

Abstract:
1. A vibration control apparatus comprising: a first object; a first spring mechanism configured to support the first object, wherein a first system includes the first object and the first spring mechanism; a first actuator configured to apply a force to the first object; a detection system configured to detect a position of the first object; and a first computing device configured to generate a command value for the first actuator based on an output of the detection system to control vibration of the first object, wherein the detection system includes: a second object, a second spring mechanism configured to support the second object, wherein a second system includes the second object and the second spring mechanism, a third object configured to support the second spring mechanism, wherein the detection system is configured to detect a position of the first object relative to at least one of the second object and the third object, a third spring mechanism configured to support the third object, wherein a third system includes the third object and the third spring mechanism, a first displacement detector configured to detect displacement of the third object relative to the second object, a second actuator configured to apply a force to the third object, and a second computing device configured to generate a command value for the second actuator based on an output of the first displacement detector to reduce the displacement of the third object relative to the second object, wherein the detection system is configured such that a second natural frequency of the second system is higher than a first natural frequency of the first system, and a third natural frequency of the third system is higher than the first natural frequency.