Vibration-based piezoelectric energy harvesting system for rotary motion applications

Date created: 
Dr. Siamak Arzanpour
Dr. Mehrdad Moallem
Applied Science: School of Engineering Science
Piezoelectric Energy harvester, Flexible cantilever dynamics, Rotary motion instrumentation.

The modeling and design of a piezoelectric flexible beam that can be used as an energy scavenger for rotary motion applications is investigated in this thesis. The energy harvester consists of a piezoelectric cantilever beam with a tip mass mounted on a rotating hub. Dynamic model of the harvester is derived using Euler-Bernoulli beam equation and considering the effect of the piezoelectric transducer. Equations of motion are derived using Lagrangian approach followed by relationships describing the harvested power. In particular, expressions describing the optimum load resistance and the maximum power that can be harvested using the proposed system are derived. Effect of parameters on the harvester dynamics is analyzed. Fabrication of the prototype is presented further. The model is verified for resonance and off-resonance operation comparing to the experimental results. It is shown that by proper parameter selection the output power of the harvester is sufficient to power wireless sensors.

Thesis type: 
(Thesis) M.A.Sc.
Document type: 
Copyright remains with the author. The author granted permission for the file to be printed and for the text to be copied and pasted.