Patent ID: 6128552
Filing Date: 2000-10-03
Classification: F16F,G03F,G05D

Abstract:
An anti-vibration apparatus comprising:an anti-vibration table;a plurality of support legs which are arranged between a foundation and said anti-vibration table, support said anti-vibration table, and have actuators for damping vibration of said anti-vibration table;a generator which generates control signals for driving said individual actuators on the basis of vibration information obtained by detecting the vibration of said anti-vibration table;a plurality of vibration detectors which detect vibration of the foundation corresponding to a degree of freedom of each actuator;a compensator which generates compensation signals on the basis of vibrations detected by said plurality of vibration detectors, and compensates the control signals generated by said generator using the compensation signals; anda driver which drives the actuators based on the signals compensated by said compensator.