Documents in the NTIS Technical Reports collection are the results of federally funded research. They are directly submitted to or collected by NTIS from Federal agencies for permanent accessibility to industry, academia and the public.  Before purchasing from NTIS, you may want to check for free access from (1) the issuing organization's website; (2) the U.S. Government Printing Office's Federal Digital System website; (3) the federal government Internet portal; or (4) a web search conducted using a commercial search engine such as
Accession Number ADA564020
Title Bi-axial Vibration Energy Harvesting.
Publication Date Jul 2012
Media Count 54p
Personal Author I. Powlesland J. McLeod S. Galea S. Moss
Abstract This report describes a vibration energy harvesting approach that uses a magnetoelectric (ME) transducer to harvest energy from bi-axial vibrations. The approach is being explored as a potential means of powering in situ structural health monitoring systems embedded within aircraft and other high value engineering assets that experience mechanical vibration. A bi-axial oscillator is created using a permanent-magnet/ball-bearing arrangement, which has the added benefit of permitting a relatively compact design. The magnet produces a bi-axial restoring force on the bearing, and as the bearing oscillates it steers magnetic field through a magnetostrictive/piezoelectric laminate transducer thereby producing an oscillating charge that can be harvested. A simple laboratory demonstrator of a bi-axial ME harvester was created using a Terfenol-D/lead zirconate titanate/Terfenol-D transducer, and was shown to produce a peak rms power of 121 from an rms acceleration of 61 mG at 9.8 Hz.
Keywords Australia
Electrical properties
Energy harvesting
Foreign reports
Lead titanates
Lead zirconate titanates
Magnetic fields
Magnetostrictive elements
Mechanical properties
Peak values
Permanent magnet generators
Piezoelectric transducers

Source Agency Non Paid ADAS
NTIS Subject Category 97O - Miscellaneous Energy Conversion & Storage
Corporate Author Defence Science and Technology Organisation, Victoria (Australia). Air Operations Div.
Document Type Technical report
Title Note Technical rept.
NTIS Issue Number 1302
Contract Number N/A

Science and Technology Highlights

See a sampling of the latest scientific, technical and engineering information from NTIS in the NTIS Technical Reports Newsletter

Acrobat Reader Mobile    Acrobat Reader