Nonlinear dynamics and triboelectric energy harvesting from a three-degree-of-freedom vibro-impact oscillator

Abstract

A triboelectric energy harvester based on a three-degree-of-freedom vibro-impact oscillator is presented. Both the dynamic model of the oscillator and the theoretical model of the oscillator-based triboelectric energy harvester are established. The dynamic response and its effect on the electrical output are considered for various mass ratios and mass spacings. The study leads to the conclusions that the symmetric mass configurations of the oscillator are more beneficial to energy harvesting than the asymmetric cases. The extent of the initial spacing between the masses influences the dynamics of the system and the electrical output by triggering grazing bifurcation. High-order periodicity is found to accompany a reduction in the electrical power. An increase in mass ratio tends to increase the electrical output, and there may exist an optimal mass ratio at which the electrical output is maximized. Chatter and sticking motion can improve the output performance dramatically, while resonance, as usual, corresponds to large amplitude response, but these large amplitudes are not optimal for triboelectric energy harvesting, and thus the maximal output does not appear around resonance. This is different from other types of vibration-based energy harvesters, such as piezoelectric and magneto-

Analytical and Experimental Studies of Double Elastic Steel Sheet (DESS) Vibration Energy Harvester System

“…Only bending mode was considered in the theoretical model. Equations (5)-(7), (14), (15) detail the nonlinear bending motion of the DESS VEH system. The slender beam model was assumed to ignore the coupled torsional motion.…”

“…φ n (x) ξ 1n (τ) and substitute into Equations (15) and (16). The orthogonal method was used to obtain the following equation:…”

“…The vibro-impact in VEH systems usually happens between flexible beams and relatively rigid stoppers. Fu et al [15] proposed a three-degree-of-freedom vibro-impact model to implement a triboelectric energy harvesting system. The one-dimensional nonlinear rigid body dynamic motion was investigated.…”

Cylinder‐based hybrid rotary nanogenerator for harvesting rotational energy from axles and self‐powered tire pressure monitoring

“…[1][2][3] Although a series of techniques, such as piezoelectric nanogenerators, electrostatic generators and electromagnetic generators, has been utilized for harvesting diverse mechanical energy, most of them individually are relatively low-efficiency or of complex preparation. [1][2][3] Although a series of techniques, such as piezoelectric nanogenerators, electrostatic generators and electromagnetic generators, has been utilized for harvesting diverse mechanical energy, most of them individually are relatively low-efficiency or of complex preparation.…”

“…Mechanical energy is quite abundant in our living environment with the considerable availability both in location and time. [1][2][3] Although a series of techniques, such as piezoelectric nanogenerators, electrostatic generators and electromagnetic generators, has been utilized for harvesting diverse mechanical energy, most of them individually are relatively low-efficiency or of complex preparation. [4][5][6][7] Since TENGs were invented by Zhong Lin Wang's group in 2012, [8][9][10][11][12][13][14] inspired from triboelectrification, TENGs have been proved to be simple, cost-effective, and feasible to harvest environmental mechanical energy.…”