Experiments on active control of vibrational power flow using piezoceramic actuators/sensors

Abstract

The active control of flexural power flow in both semi-infinite and finite elastic beams is experimentall y investigated. The experimental results demonstrate that piezoceramic transducers, when used in conjunction with an adaptive least mean squares narrow-band controller, can effectively control flexural power flow at steady-state single frequencies in thin beam systems. The piezoceramic transducers offer distinct size and weight advantages over conventional transducers. The experiments also demonstrate the use of an axial scanning laser vibrometer to determine out-of-plane velocity and power flow.