Nonlinear noise harvesters for nanosensors

Neri, I.; Travasso, F.; Vocca, H.; Gammaitoni, L.

doi:10.1016/j.nancom.2011.09.001

Cited by 11 publications

(8 citation statements)

References 11 publications

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“…Similar configurations that use the attraction force between two permanent magnets to manipulate the effective stiffness of the harvester have been introduced before for tuning the resonance frequency of energy harvesters (Al-Ashtari et al, 2012b;Neri et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…In this contribution, it will be shown that the configuration introduced by Neri et al (2011) andAl-Ashtari et al (2012b) can not only be used for tuning the frequency of energy harvesters over a wide range but it can also be used for significantly increasing the harvested electrical power. Many research projects work on increasing the output power of energy harvesters but most of them focus on developing new or optimised power flow concepts based on modifying the electrical harvesting circuit, such as Ottman et al (2002), Badel et al (2006), Dicken et al (2009) and Ramadass and Chandrakasan (2010).…”

Section: Introductionmentioning

confidence: 99%

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Increasing the power of piezoelectric energy harvesters by magnetic stiffening

Al-Ashtari

Hunstig

Hemsel

et al. 2013

Journal of Intelligent Material Systems and Structures

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A piezoelectric cantilever beam with a tip mass at its free end is a common energy harvester configuration. This article introduces a new principle of designing such a harvester that increases the generated power without changing the resonance frequency of the harvester: the attraction force between two permanent magnets is used to add stiffness to the system. This magnetic stiffening counters the effect of the tip mass on the efficient operation frequency. Five set-ups incorporating piezoelectric bimorph cantilevers of the same type in different mechanical configurations are compared theoretically and experimentally to investigate the feasibility of this principle: theoretical and experimental results show that magnetically stiffened harvesters have important advantages over conventional set-ups with and without tip mass. They generate more power while only slightly increasing the deflection in the piezoelectric harvester and they can be tuned across a wide range of excitation frequencies.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Increasing the power of piezoelectric energy harvesters by magnetic stiffening

Al-Ashtari

Hunstig

Hemsel

et al. 2013

Journal of Intelligent Material Systems and Structures

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“…Energy harvesting can be performed both at the macro [1], micro [3] and even at nano scales [2]. Unfortunately, most of the available power sources have very low frequency oscillations while the resonant frequency of any nano-mechanical device is paradoxically high (∝ GHz) which make many issues related to their performances as energy harvesters yet to be solved, particularly that of extracting energy at low frequencies.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Dynamics of an Ambient Noise Driven Array of Coupled Graphene Nanostructured Devices for Energy Harvesting

Aroudi

López-Suárez

Alarcón

et al. 2014

MATEC Web of Conferences

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Abstract.Nonlinearities have been shown to play an important role in increasing the extracted energy of energy harvesting devices at the macro and micro scales. Vibration-based energy harvesting on the nano scale has also received attention. In this paper, we characterize the nonlinear dynamical behavior of an array of three coupled strained nanostructured graphene for its potential use in energy harvesting applications. The array is formed by three compressed vibrating membrane graphene sheet subject to external vibrational noise excitation. We present the continuous time dynamical model of the system in the form of a double-well three degree of freedom system. Random vibrations are considered as the main ambient energy source for the system and its performances in terms of the probability density function, RMS or amplitude value of the position, FFT spectra and state plane trajectories are presented in the steady state non-equilibrium regime when the noise level is considered as a control parameter.

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“…There are different energy harvesting technologies that can be used depending on the kind of the available energy. Among the energy sources, vibrational kinetic energy is the most used for applications such as development of micro generators [1] and noise harvesters for nanosensors [2]. In this approach mechanical energy is converted to electricity by using piezoelectric, capacitive or inductive transducers.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, energy harvesting can be performed both at the macro [3], micro [7] and even at nano scales [2]. Unfortunately, most of the available power sources have very low frequency oscillations while the resonant frequency of any nano-mechanical device is paradoxically high (∝ GHz) which make many issues related to their performances as energy harvesters yet to be solved, particularly that of extracting energy at low frequencies.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamics in a graphene nanostructured device for energy harvesting

Aroudi

López-Suárez²,

Alarcón

et al. 2013

2013 IEEE International Symposium on Circuits and Systems (ISCAS2013)

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Nonlinearities have been shown to play an important role in increasing the extracted energy of energy harvesting devices at the macro and micro scales. Vibration-based energy harvesting on the nano scale has also received attention. In this paper, we characterize the nonlinear dynamical behavior of a strained nanostructured graphene for its potential use in energy harvesting applications. A compressed vibrating membrane graphene sheet free from any external excitation is first studied. We present a continuous time dynamical model of the system in the form of a double-well single degree of freedom system. Equilibrium points are obtained and their stability analysis is carried out. Then, random vibrations are considered as the main ambient energy source for the system and its performances in terms of the well occupation zones, RMS value of the position, and the corresponding energy harvested are presented in the steady state non-equilibrium regime when the noise level is considered as a control parameter. From this model, nonlinear analysis is carried out by computing state space trajectories, probability density and FFT spectra under a deterministic excitation. The ultimate goal of this parameter space exploration based upon a behavioral model is to provide design-oriented guidelines for engineering graphene-based mechanical harvestersPostprint (published version

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Nonlinear noise harvesters for nanosensors

Cited by 11 publications

References 11 publications

Increasing the power of piezoelectric energy harvesters by magnetic stiffening

Increasing the power of piezoelectric energy harvesters by magnetic stiffening

Nonlinear Dynamics of an Ambient Noise Driven Array of Coupled Graphene Nanostructured Devices for Energy Harvesting

Nonlinear dynamics in a graphene nanostructured device for energy harvesting

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