Piezoelectric multifrequency energy converter for power harvesting in autonomous microsystems

By Marco Ferrari, Vittorio Ferrari, M. Guizzetti, D. Marioli, A. Taroni. 2008

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Broadband vibration-based energy harvesting improvement through frequency up-conversion by magnetic excitation (2010, background): “Using an array of cantilevered beams of varying length has been studied for electromagnetic (Sari et al 2008) and piezoelectric (Malkin and Davis 2005, Ferrari et al 2008) energy harvesting.”
Nonlinear Behavior of an Electrostatic Energy Harvester Under Wide- and Narrowband Excitation (2010, unknown): “[10], [11].”
A review of energy harvesting using piezoelectric materials: state-of-the-art a decade later (2008–2018) (2019, background): “mechanical boundary conditions and different beam configurations, including designs with a dynamic amplifier support instead of a fixed end [151] (figure 3(c)), an asymmetric tuned mass [152] (figure 3(d)), clamped-clamped boundary conditions with compressive load [150], multiple inertia masses [153”
Development of a broadband nonlinear two-degree-of-freedom piezoelectric energy harvester (2014, background): “A system comprising an array of cantilever beams with different resonant frequencies can achieve wider bandwidth covered by all cantilever harvester components (Ferrari et al., 2008; Shahruz, 2006).”
Improved Energy Harvesting from Wideband Vibrations by Nonlinear Piezoelectric Converters (2009, unknown): “The ﬁrst strategy consists of the use of multiple converters with different frequency responsescombinedintoarrays[14–17].”