ACTIVE DAMPING DEVICE & RELATED CONTROLLERS FOR ACTIVE VIBRATION CONTROL
Active dampers are based on the principle that accelerating a suspended mass results in a reaction force on the supporting structure. An embedded sensor monitors the supporting structure vibration. The sensor readings are sent to an external feedback controller that drives the internal electromagnetic actuator of the active damping device.
As it does not rely on a model of the structure to be controlled, a rather simple control algorithm can be implemented. It will work theoretically on any type of structure and will damp any vibration mode that is observable in its open-loop transfer function. The only selectable parameters for the control system are the actuator/sensor location and the feedback gain.