Performance Analysis of an Electromagnetically Coupled Piezoelectric Energy Scavenger

Abstract

The deliberate introduction of nonlinearities is widely used as an effective technique for the bandwidth broadening of conventional linear energy harvesting devices. This approach not only results in a more uniform behavior of the output power within a wider frequency band through bending the resonance response, but also contributes to energy harvesting from low-frequency excitations by activation of superharmonic resonances. This article investigates the nonlinear dynamics of a monostable piezoelectric harvester under a self-powered electromagnetic actuation. To this end, the governing nonlinear partial differential equations of the proposed harvester are order-reduced and solved by means of the perturbation method of multiple scales. The results indicate that, according to the excitation amplitude and load resistance, different responses can be distinguished at the primary resonance. The system behavior may involve the traditional bending of response curves, Hopf bifurcations, and instability regions. Furthermore, an order-two superharmonic resonance is observed, which is activated at lower excitations in comparison to order-three conventional resonances of the Duffing-type resonator. This secondary resonance makes it possible to extract considerable amounts of power at fractions of natural frequency, which is very beneficial in micro-electro-mechanical systems (MEMS)-based harvesters with generally high resonance frequencies. The extracted power in both primary and superharmonic resonances are analytically calculated, then verified by a numerical solution where a good agreement is observed between the results.

Vibration harvesting integrated into vehicle suspension and bodywork

“…This external excitation can change the vehicle's engine behaviour or the car's antilock brakes device (ABD) [19]. The authors of [20], [21] have been proposed an applicable strategy to collect high bandwidth of vibrations energy through the use of transducer attached to the suspension system. Nevertheless, this approach does not preserve conduction safety for the conductor due to the changed suspension properties.…”

Static and Dynamic Solutions of Functionally Graded Micro/Nanobeams under External Loads Using Non-Local Theory

“…These materials provide various advantages in different engineering applications [9,[13][14][15][16][17][18], such as lower stress intensity factors, improved stress spreading, enhanced corrosion resistance, higher thermal resistance and higher fracture toughness. Indeed, the properties of FG materials can be witnessed in some natural structures (such as sea shell and bone) and better understanding of these properties can help us synthesize new materials [19][20][21][22][23][24].…”

A Parametric Study of Mechanical Cross-Coupling in Parallel-Kinematics Piezo-Flexural Nano-Positioning Systems

“…The second and third authors have the same contribution. advanced technologies such as precision metrology, scanning probe microscopy [1]- [7], energy harvesting [8] [9] [10] [11], medical robotics [12] [13], biomechanics research apparatus [14]- [20], orthodontics [21] [22] [23], material [24] [25] [26], structural engineering [27] [28], microfluidic devices [29] [30] [31] [32] [33] and other instruments which need precise actuation. Several different factors limit the precision positioning of PPNP stages, including mechanical vibrations, external disturbances, hysteresis and creep effects, temperature variation, and the cross-coupling of the different axes.…”