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We present a new method to create an active cloak for a rigid inclusion in athin plate, and analyse flexural waves within such a plate governed by theKirchhoff plate equation. We consider scattering of both a plane wave and acylindrical wave by a single clamped inclusion of circular shape. In order tocloak the inclusion, we place control sources at small distances from thescatterer and choose their intensities to eliminate propagating orders of thescattered wave, thus reconstructing the respective incident wave. We then varythe number and position of the control sources to obtain the most effectiveconfiguration for cloaking the circular inclusion. Finally, we successfullycloak an arbitrarily shaped scatterer in a thin plate by deriving asemi-analytical, asymptotic algorithm.

Active cloaking of finite defects for flexural waves in elastic plates