发明名称 |
VIBRATION ISOLATION APPARATUS, EXPOSURE APPARATUS, AND DEVICE MANUFACTURING METHOD |
摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vibration isolation apparatus capable of detecting occurrence of an earthquake without needing an earthquake detection sensor nor stopping acceleration feedback loop control. <P>SOLUTION: This active vibration isolation apparatus includes: a vibration isolation stand for mounting an apparatus thereon; an air spring supporting the vibration isolation stand; an actuator device driving the air spring; a linear motor device for vibration isolation; a position measurement means measuring the position of the vibration isolation stand; a vibration measurement means measuring vibration of the vibration isolation stand; and a control device of the actuator device and the linear motor device for vibration isolation having a position feedback loop based on the output of the position measurement means and an acceleration feedback loop based on the output of the vibration measurement means; and is characterized by detecting the earthquake by a square integrated value of a control current of the acceleration feedback loop upon earthquake occurrence. <P>COPYRIGHT: (C)2009,JPO&INPIT |
申请公布号 |
JP2009016402(A) |
申请公布日期 |
2009.01.22 |
申请号 |
JP20070173514 |
申请日期 |
2007.06.29 |
申请人 |
CANON INC |
发明人 |
YOSHIMURA TAKUMA |
分类号 |
H01L21/027;F16F15/02;F16F15/027;G05D19/02 |
主分类号 |
H01L21/027 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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