Global sensitivity analysis of asymmetric energy harvesters

Parametric variability is inevitable in actual energy harvesters. It can significantly affect crucial aspects of the system performance, especially harvesting systems that present geometric parameters, material properties, or excitation conditions are susceptible to small perturbations. This work aims develop an investigation identify most critical parameters dynamic behavior asymmetric bistable harvesters with nonlinear piezoelectric coupling, considering their physical and properties. For this purpose, a global sensitivity analysis based on orthogonal variance decomposition, employing Sobol indices, performed quantify effect harvester recovered power. technique quantifies concerning each parameter individually collectively regarding total variation model. The results indicate frequency amplitude excitation, terms electrical proprieties coupling mean power harvested. also shown order importance change according stability harvester's response. In way, better understanding under obtained since study allows identification vital rule therefore constitutes powerful tool robust design, optimization, response prediction