Patent ID: 7622939

Claim:
A system operable to maintain a relative position between a first component and a second component, the system comprising: a position controller coupled to an X-Y motion system which is coupled to the first component; at least one sensor coupled to the first component or a frame supporting the first component, wherein the at least one sensor is configured to measure at least one parameter along at least one axis of a three-dimensional coordinate system; and a control system coupled to the first component and configured to receive information from the at least one sensor and configured to determine actuation forces based on the information and wherein the actuation forces act on the first component to repeatedly compensate for vibration disturbances to the system and wherein the control system determines the actuation forces based on at least one of an acceleration and a velocity, wherein the actuation forces are calculated based on a motion of the first component and a motion of the second component, and wherein the X-Y motion system is initially coupled to a base and then configured to move horizontally with respect to the base on a low friction guide by the position controller which controls the X-Y motion system that is coupled to move the first component for positioning using the low friction guide, and wherein the actuation forces are delivered using the X-Y motion system.