Abstract
In this paper a bistable composite cantilever beam comprising asymmetric laminates is studied for vibration energy harvesting applications. An additional magnetic bistability is introduced to the harvesting system to lower the level of excitation that triggers the snap-through for the cantilever from one stable state to another, while retaining the favorable broadband performance. In order to achieve the, the cantilever beam is fitted with a permanent magnet at its tip that is oriented so that there is magnetic repulsion with a stationary magnet. The system performance can be adjusted by varying the separation between the magnets. Experimental results reveal that the use of magnetic bistability enhances broadband performance and improves the output power within a certain level of drive level and magnet separation. The load-deflection characteristic of the bistable beam is experimentally determined, and is subsequently used to model the system by a reduced single-degree-of-freedom (SDOF) system having the form of the Duffing equation for a double-well potential system. The dynamics of the beam are investigated using bifurcation diagrams and shows that the qualitative behavior given by the experimentally measured response is predicted well by the simple SDOF model.
| Original language | English |
|---|---|
| Title of host publication | Energy Harvesting and Storage |
| Subtitle of host publication | Materials, Devices, and Applications VII |
| Editors | N. K. Dhar, A. K. Dutta |
| Publisher | SPIE |
| ISBN (Print) | 9781510601062 |
| DOIs | |
| Publication status | Published - 2016 |
| Event | Energy Harvesting and Storage: Materials, Devices, and Applications VII - Baltimore, USA United States Duration: 19 Apr 2016 → … |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 9865 |
Conference
| Conference | Energy Harvesting and Storage: Materials, Devices, and Applications VII |
|---|---|
| Country | USA United States |
| City | Baltimore |
| Period | 19/04/16 → … |
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Keywords
- bistable
- composites
- energy harvesting
- modelling
- Piezoelectric
Cite this
A composite beam with dual bistability for enhanced vibration energy harvesting. / Harris, Peter; Litak, Grzegorz; Bowen, Chris R.; Arafa, Mustafa.
Energy Harvesting and Storage: Materials, Devices, and Applications VII. ed. / N. K. Dhar; A. K. Dutta. SPIE, 2016. 98650K (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9865).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - A composite beam with dual bistability for enhanced vibration energy harvesting
AU - Harris, Peter
AU - Litak, Grzegorz
AU - Bowen, Chris R.
AU - Arafa, Mustafa
PY - 2016
Y1 - 2016
N2 - In this paper a bistable composite cantilever beam comprising asymmetric laminates is studied for vibration energy harvesting applications. An additional magnetic bistability is introduced to the harvesting system to lower the level of excitation that triggers the snap-through for the cantilever from one stable state to another, while retaining the favorable broadband performance. In order to achieve the, the cantilever beam is fitted with a permanent magnet at its tip that is oriented so that there is magnetic repulsion with a stationary magnet. The system performance can be adjusted by varying the separation between the magnets. Experimental results reveal that the use of magnetic bistability enhances broadband performance and improves the output power within a certain level of drive level and magnet separation. The load-deflection characteristic of the bistable beam is experimentally determined, and is subsequently used to model the system by a reduced single-degree-of-freedom (SDOF) system having the form of the Duffing equation for a double-well potential system. The dynamics of the beam are investigated using bifurcation diagrams and shows that the qualitative behavior given by the experimentally measured response is predicted well by the simple SDOF model.
AB - In this paper a bistable composite cantilever beam comprising asymmetric laminates is studied for vibration energy harvesting applications. An additional magnetic bistability is introduced to the harvesting system to lower the level of excitation that triggers the snap-through for the cantilever from one stable state to another, while retaining the favorable broadband performance. In order to achieve the, the cantilever beam is fitted with a permanent magnet at its tip that is oriented so that there is magnetic repulsion with a stationary magnet. The system performance can be adjusted by varying the separation between the magnets. Experimental results reveal that the use of magnetic bistability enhances broadband performance and improves the output power within a certain level of drive level and magnet separation. The load-deflection characteristic of the bistable beam is experimentally determined, and is subsequently used to model the system by a reduced single-degree-of-freedom (SDOF) system having the form of the Duffing equation for a double-well potential system. The dynamics of the beam are investigated using bifurcation diagrams and shows that the qualitative behavior given by the experimentally measured response is predicted well by the simple SDOF model.
KW - bistable
KW - composites
KW - energy harvesting
KW - modelling
KW - Piezoelectric
UR - http://www.scopus.com/inward/record.url?scp=84983371295&partnerID=8YFLogxK
UR - http://dx.doi.org/10.1117/12.2225144
U2 - 10.1117/12.2225144
DO - 10.1117/12.2225144
M3 - Conference contribution
AN - SCOPUS:84983371295
SN - 9781510601062
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Energy Harvesting and Storage
A2 - Dhar, N. K.
A2 - Dutta, A. K.
PB - SPIE
ER -