Regular and chaotic vibration in a piezoelectric energy harvester

Abstract

We examine regular and chaotic responses of a vibrational energy harvester composed of a vertical beam and a tip mass. The beam is excited horizontally by a harmonic inertial force while mechanical vibrational energy is converted to electrical power through a piezoelectric patch. The mechanical resonator can be described by single or double well potentials depending on the gravity force from the tip mass. By changing the tip mass we examine bifurcations from single well oscillations, to regular and chaotic vibrations between the potential wells. The appearance of chaotic responses in the energy harvesting system is illustrated by the bifurcation diagram, the corresponding Fourier spectra, the phase portraits, and is confirmed by the 0-1 test. The appearance of chaotic vibrations reduces the level of harvested energy.

Nonlinear Characterization of a Bistable Energy Harvester Dynamical System

“…2, may present better power recovering performances, when compared to the linear counterparts. The richness of such devices dynamics, combined with the new available improvements in numerical simulation tools and computing resources, have been propelling a wide variety of analysis considering different devices layouts, as seen in [10,18,34,39] for composite and cantilever vibrating beams, or in [11,15,25,26] for inverse pendulum layouts and new designs as those discussed in [5,8,16,33,45].…”

Vibration control method for a crawler-type combine harvester

“…The vibration of the working parts, such as vibrating screen, detached roller and fan, need to be tested on the basis of the above analysis, and the larger vibration points of each part under different working conditions should be tested in detail. The test results show that the vibration of the transport trough and the threshing device mainly originates from the transmission shaft, while the vibration of the drum and the fan is mainly from the installation, and the vibration produced by itself is little (Litak et al, 2016). To sum up, the main vibration of the combine harvester comes from the cutting structure, the vibrating screen and the engine, moreover, the conveying tank, the threshing roller and the fan will also affect the vibration of the crawler-type combine harvester.…”

Complex response of an oscillating vertical cantilever with clearance

“…Among various proposals for energy harvesting, inverted pendulum systems have been tested [19][20][21][22]. On the other hand, studies on horizontal beams with amplitude limiters can be also found [23].…”