Multi-modal modulated and demodulated vibration control of flexible structures using piezoelectric transducers

We propose a novel method for controlling vibrations within a resonant structure equipped with piezoelectric transducers. The scheme uses a parallel connection of modulated and demodulated controllers, each designed to damp the transient oscillation corresponding to a single mode. This technique allows multiple modes to be controlled with a single actuator. Simulation results are provided for a laminate beam.