Active isolation of plate structures subject to base excitation using a novel Kaiman estimator-based, feed-forward controller is studied. The controller is always 2nd order irrespective of the complexity of the structure being controlled. Moreover, it does not require real-time adaptation and yet stays effective when the attributes of the base excitation change. Using the proposed controller, the vibration attenuation of a plate (the size of a computer board) with two different boundary conditions are demonstrated.

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