Active suppression of a beam under a moving mass using a pointwise fiber bragg grating displacement sensing system
Journal
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Journal Volume
59
Journal Issue
10
Start Page
2137
End Page
2148
ISSN
08853010
15258955
Date Issued
2012
Author(s)
Abstract
This paper investigates active vibration control of a beam under a moving mass using a pointwise fiber Bragg grating (FBG) displacement sensing system. Dynamic responses of the proposed FBG displacement sensor are demodulated with an FBG filter and verified with measurement results obtained from a noncontact fiber-optic displacement sensor. System identification of the beam is first performed with a piezoceramic actuator and positive position feedback (PPF) controllers are designed based on the identified results. Then, transient responses of the beam under a moving mass with different moving conditions are measured using the FBG displacement sensor. A high-speed camera is used to detect the speed of the moving mass for further discussions about its influence on the transient response. Finally, active vibration control of the beam under the moving mass is performed and fast Fourier transform (FFT) as well as short-time Fourier transform (STFT) are employed to demonstrate control performances. For the case in which a rolling steel ball is directed from a slide to the beam to generate the moving mass, reductions of the vibration up to 50% and 60% are achieved in the frequency domain for the first and second modes of the beam, respectively. Based on the control experiments on the smallscale beam, results in this work show that the proposed FBG displacement sensing system can be used in research on the moving mass problem.
Subjects
Active Vibration Controls
Control Experiments
Control Performance
Displacement Sensing
Displacement Sensor
Fiber Optic Displacement Sensor
Frequency Domains
Measurement Results
Moving Mass
Non-contact
Piezo-ceramic Actuators
Positive Position Feedback
Rolling Steel
Short Time Fourier Transforms
Dynamic Response
Fast Fourier Transforms
Sensors
Vibration Control
Fiber Bragg Gratings
Type
journal article