Optimal Active Vibration Isolation Systems for Multiple Noise Sources

The performance of active vibration isolation systems is limited by several effects, including sensor noise and signal filtering. It is shown in this paper that the joint contribution of those effects to the acceleration of the payload is minimized for a bounded set of parameters of the control system and the mechanics. Notably, a bounded optimal value for the skyhook damper is found. Furthermore, these minimizing parameters are found to be in the feasible design space. In a reference case, the RMS acceleration in the relevant frequency band is found to decrease by a factor of 22 using the proposed optimization method.