Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
ROBUST DESIGN OF ENERGY HARVESTING RESONANT DEVICES BY MULTI-OBJECTIVE OPTIMIZATION
Submission Author:
Paulo Martins , SP
Co-Authors:
Paulo Martins, Marcelo A. Trindade
Presenter: Paulo Martins
doi://10.26678/ABCM.COBEM2019.COB2019-1343
Abstract
The increase in energy consumption in the last decades led to the study of alternative energy sources such as the energy harvested from mechanical vibrations using resonant piezoelectric harvesting devices. The deterministic optimization methods are important to design devices with maximum harvested power. However, uncertainties are present in many mechanical structures and, in this case, non-deterministic optimization is essential for assuring a more robust design, which performance is less sensitive to variations. This work aim to design energy harvesting devices with clamped beams through Sequential Quadratic Programming (SQP) algorithm together with a robust design method known as compromise programming considering uncertainties in devices. This is done using frequency response function (FRF) for power output and squared acceleration input at the clamp and first-order Taylor series approximations for the mean and standard deviation. Results show that optimal and robust energy harvesting devices can be designed accounting for a compromise between harvested power and system's uncertainties following criteria defined by the analyst.
Keywords
energy harvesting, Piezoelectric materials, Optimization, Uncertainties, robust design
