Patent ID: 8281911

Claim:
An active vibration isolation system, comprising: an air bearing for supporting a load to be isolated; a first sensor for detecting, in a first degree of freedom, vibration on the ground on which the active vibration isolation system is arranged, wherein the first sensor for detecting the vibration on the ground is a velocity sensor; a second sensor for detecting vibration on the load to be isolated; a control device for calculating compensation signals in at least two degrees of freedom for the load to be isolated, the compensation signals being based on the vibration detected in the first degree of freedom, wherein the first sensor and the second sensor are signally connected to the control device, and wherein the compensation signals are added by the control device to additional compensation signals that are based on the vibration detected by the second sensor; and an actuator for acting on the load to be isolated based on the added compensation signals, wherein the control device is signally connected to the actuator.