Study of Active Vibration Control for Fiber Smart Beam

摘要

Aiming at the problem that resonance phenomenon of materials have harmful effects for stability and precision of system, Fiber Bragg Grating (FBG) was used as sensors and piezoelectric ceramics as actuators to study the active vibration control for the resonance of the smart beam. For getting the resonant frequency, the experimental mode analysis for the smart beam is done by the TestLab from LMS. Two groups of piezoelectric ceramics will be used for vibration exciter and vibration abatement, respectively. The fiber smart beam is excited to a sharp vibration nearby the particular resonance frequency by controlling the frequency of the vibration excitation. The vibration signal is measured by the FBG sensors and the close loop feedback control is fulfilled by the vibration abatement group, and the vibration amplitude of the fiber smart beam is abated. The experiment results show that the resonance amplitude of the beam is obviously abated by adjusting the frequency, amplitude and phase of the vibration abatement circuit.