BOUNDARY CONTROL OF BEAMS USING ACTIVE CONSTRAINED LAYER DAMPING

A variational mathematical model is developed using Hamilton's princip le to describe the dynamics of beams fully-treated with Active Constra ined Layer Damping (ACLD) treatments. The resulting distributed-parame ter model is utilized in devising a globally stable boundary control s trategy which is compatible with the operating nature of the ACLD trea tments. The effectiveness of the ACLD in damping out the vibration of cantilevered beams is determined for different control gains and compa red with the performance of conventional Passive Constrained Layer Dam ping (PCLD). The results obtained demonstrate the high damping charact eristics of the boundary controller particularly over broad frequency bands.