The Analysis of Piezomagnetoelastic Energy Harvesters under Broadband Random Excitations
SF Ali, S Adhikari, MI Friswell (Swansea University) & S Narayanan (IIT Madras, India)
Journal of Applied Physics, Vol. 109, No. 7, April 2011, paper 074904
Analysis of piezomagnetoelastic energy harvesters under broadband random ambient excitations for the purpose of powering low power electronic sensor systems has been considered. Nonlinear behaviour arising due to the vibration in a magnetic field makes piezomagnetoelastic energy harvesters different from the more classical piezoelastic energy harvesters. An equivalent linearization based analytical approach is developed for the analysis of harvested power. A closed form approximate expression for the ensemble average of the harvested power is derived and validated against numerical Monte Carlo simulation results. Our results show that it is possible to optimally design the system such that the mean harvested power is maximized for a given strength of the input broadband random ambient excitation.
This material has been published in the Journal of Applied Physics, Vol. 109, No. 7, April 2011, paper 074904, the only definitive repository of the content that has been certified and accepted after peer review. Copyright and all rights therein are retained by the American Institute of Physics.
Link to paper using doi: 10.1063/1.3560523
Link to paper on the AIP website
Journal of Applied Physics