Test rig with active damping control for the simultaneous evaluation of vibration control and energy harvesting via piezoelectric transducers

Piezoelectric transducers can be used to harvest electrical energy from structural vibrations in order to power continuously operating condition monitoring systems local to where they operate. However, excessive vibrations can compromise the safe operation of mechanical systems. Therefore, absorbers...

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Bibliographic Details
Published in:Journal of physics. Conference series 2016-09, Vol.744 (1), p.12010
Main Authors: Perfetto, S, Rohlfing, J, Infante, F, Mayer, D, Herold, S
Format: Article
Language:English
Subjects:
Absorbers
Active control
Active damping
Actuators
Coils
Condition monitoring
Electromagnetic forces
Energy
Energy conversion
Energy dissipation
Energy harvesting
Feedback control
Laboratory tests
Mechanical systems
Physics
Piezoelectric transducers
Vibration
Vibration control
Vibration damping
Vibration monitoring
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Summary:Piezoelectric transducers can be used to harvest electrical energy from structural vibrations in order to power continuously operating condition monitoring systems local to where they operate. However, excessive vibrations can compromise the safe operation of mechanical systems. Therefore, absorbers are commonly used to control vibrations. With an integrated device, the mechanical energy that otherwise would be dissipated can be converted via piezoelectric transducers. Vibration absorbers are designed to have high damping factors. Hence, the integration of transducers would lead to a low energy conversion. Efficient energy harvesters usually have low damping capabilities; therefore, they are not effective for vibration suppression. Thus, the design of an integrated device needs to consider the two conflicting requirements on the damping. This study focuses on the development of a laboratory test rig with a host structure and a vibration absorber with tunable damping via an active relative velocity feedback. A voice coil actuator is used for this purpose. To overcome the passive damping effects of the back electromagnetic force a novel voltage feedback control is proposed, which has been validated both in simulation and experimentally. The aim of this study is to have a test rig ready for the introduction of piezo-transducers and available for future experimental evaluations of the damping effect on the effectiveness of vibration reduction and energy harvesting efficiency.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/744/1/012010