Patent ID: 8807515

Claim:
A method of damping a vibration of a vibration-sensitive payload coupled to a platform assembly, comprising: positioning at least one vibration sensor within an inner core of a tabletop forming the platform assembly, the inner core positioned between and in communication with at least one of a first surface and second surface of the tabletop; positioning at least one damper within the inner core, the at least one damper in communication with the first surface of the tabletop; coupling the vibration-sensitive payload to the first surface of the tabletop; sensing at least one vibration of the first surface of the tabletop supporting the vibration-sensitive payload with the at least one vibration sensor; damping the vibration of the first surface of tabletop supporting the vibration- sensitive equipment with the at least one damper, controlling the at least one damper with at least one controller, coupling the at least one controller to the at least one damper and the at least one vibration sensor, wherein the at least one controller receives data from the at least one vibration sensor and controls the at least one damper in response to the data, wherein the at least one controller causes the at least one damper to create an active force that emulates an effect of a viscous damper in a frequency domain encompassing a plurality of natural frequencies of a flexural vibration of the first surface.