TY - GEN
T1 - Enhancement of energy-harvesting from random vibration by switched shunt circuit
AU - Shimose, Shigeru
AU - Onoda, Junjiro
AU - Makihara, Kanjuro
PY - 2012/12/1
Y1 - 2012/12/1
N2 - Many researchers have been trying to harvest electric energy from structural vibration for various self-powered small systems. To enhance the harvesting performance self-powered switched shunt circuits have been invented. However, all of these studies have been limited to the energy harvesting form sinusoidal vibrations of a single-degree-of-frcedom (SDOF) structure. In our study, a multiple-degree-of-freedom (MDOF) structure is randomly excited. By using a piezoelectric transducer and a rectifier, electrical energy is taken out from the randomly vibrating structure and stored in a capacitor connected to an electric load. In various conditions, we study how much electrical energy can be stored with and without our switched shunt circuit. Our switched shunt circuit is composed of inductors, resistors, capacitors, diodes, thyristors, and programmable unijunction transistors (PUT), which was originally invented for semi-active vibration suppression. Experimental results show that the stored electrical energy can be increased more than twice with our simple shunt circuit even when the structure is randomly vibrating.
AB - Many researchers have been trying to harvest electric energy from structural vibration for various self-powered small systems. To enhance the harvesting performance self-powered switched shunt circuits have been invented. However, all of these studies have been limited to the energy harvesting form sinusoidal vibrations of a single-degree-of-frcedom (SDOF) structure. In our study, a multiple-degree-of-freedom (MDOF) structure is randomly excited. By using a piezoelectric transducer and a rectifier, electrical energy is taken out from the randomly vibrating structure and stored in a capacitor connected to an electric load. In various conditions, we study how much electrical energy can be stored with and without our switched shunt circuit. Our switched shunt circuit is composed of inductors, resistors, capacitors, diodes, thyristors, and programmable unijunction transistors (PUT), which was originally invented for semi-active vibration suppression. Experimental results show that the stored electrical energy can be increased more than twice with our simple shunt circuit even when the structure is randomly vibrating.
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M3 - Conference contribution
AN - SCOPUS:84883548891
SN - 9781622769797
T3 - Proceedings of the International Astronautical Congress, IAC
SP - 7086
EP - 7092
BT - 63rd International Astronautical Congress 2012, IAC 2012
T2 - 63rd International Astronautical Congress 2012, IAC 2012
Y2 - 1 October 2012 through 5 October 2012
ER -