Adaptively Tuned Piezoelectric MEMS Vibration Energy Harvester using an Electrostatic Device
H Madinei, H Haddad Khodaparast, S Adhikari, MI Friswell & M Fazeli (Swansea University)
European Physical Journal - Special Topics, Vol. 224, No. 14, November 2015, pp. 2703-2717
In this paper an adaptively tuned piezoelectric vibration based energy harvesting system based on the use of electrostatic device is proposed. The main motivation is to control the resonance frequency of the piezoelectric harvester with the DC voltage applied to the electrostatic system in order to maximize the harvested power. The idea is demonstrated in a hybrid system consisting of a cantilevered piezoelectric harvester combined with an electrostatic harvester which is connected to a variable voltage source. The nonlinear governing differential equation of motion is derived based on Euler Bernoulli theory, and solved to obtain the static and dynamic solutions. The results show that the harvester can be tuned to give a resonant response over a wide range of frequencies, and shows the great potential of this hybrid system.
This material has been published in the European Physical Journal - Special Topics, Vol. 224, No. 14, November 2015, pp. 2703-2717. Unfortunately the copyright agreement with Springer does not allow for the PDF file of the paper to be available on this website. However the paper is available from Springer-Link - see the link below.
Link to paper using doi: 10.1140/epjst/e2015-02584-6
European Physical Journal - Special Topics on Springer-Link