Broadband Vibration Energy Harvesting Techniques

Tang, Lihua; Yang, Yue; Soh, Chee Kiong

doi:10.1007/978-1-4614-5705-3_2

Cited by 66 publications

(54 citation statements)

References 71 publications

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“…Browsing the open literature presents many interesting applications for piezoelectric harvesters with wideband vibration (see for example [2,3,4,5]). The above applications can be divided in a variety of sub-systems, such as…”

Section: Introductionmentioning

confidence: 99%

Analysis and Experimental Validation of a Piezoelectric Harvester with Enhanced Frequency Bandwidth

Abramovich

Har-nes

2018

Materials

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The use of a single bimorph as a harmonic oscillator aimed at harvesting vibrational energy is not effective due to its inherent narrow frequency bandwidth stemming from the need to adjust the natural frequency of the harvester to the platform excitation frequencies. Therefore, the present research focuses on the development, manufacturing, and testing of an advanced system based on three bimorphs, capable of adjusting their natural frequencies using tip end masses, and interconnected by springs, thus enlarging the system’s bandwidth. An analytical model was developed for three bimorphs interconnected by two springs with three end masses. The model can predict the output generated voltage from each bimorph, and then the total output power is measured on a given outside resistor as a function of the material properties, the geometric dimensions of the vibrating beams, the end-masses, and the spring constants. The analytical model was then compared with data in the literature, yielding a good correlation. To further increase the reliability of the model, a test set-up was designed and manufactured that included three bimorphs with three end-masses connected by two springs. The system was excited using a shaker, and the output voltage was measured for each bimorph for various configurations. Then, the analytical model was tuned based on the test results by introducing two factors, the quality and the stiffness factors, and the predictions of the calibrated analytical model were compared with the experimental results, yielding a good correlation. The calibrated analytical model was then used to perform a comprehensive parametric investigation for two and three bimorphs systems, in which the influences of various parameters—like spring constant, mass value, thickness, and width and length of the bimorph and the substrate beam—on the output generated power were investigated. The main conclusion from this parametric investigation was that by correctly choosing the geometric sizes of the cantilevers, the adequate tip end masses, and the ratio between constants of the springs, the frequency bandwidth is expanded yielding a higher harvested power. Typical harvested power of the present designed system can reach up to 20 mW at the first natural frequency and up to 5 mW for the second natural frequency.

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Section: Introductionmentioning

confidence: 99%

Analysis and Experimental Validation of a Piezoelectric Harvester with Enhanced Frequency Bandwidth

Abramovich

Har-nes

2018

Materials

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“…Different methods have been used to decrease the natural frequencies of MEMS EHs in order to increase the output power of the device. Tang et al (2013) studied different methods to increase the working bandwidth of EHs. Adding mass to the system as the tip mass or middle mass is one of the methods for decreasing the natural frequency of the EH (Kim et al, 2011; Xue et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

A sub-cc nonlinear piezoelectric energy harvester for powering leadless pacemakers

Ansari

Karami

2017

Journal of Intelligent Material Systems and Structures

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A miniature nonlinear piezoelectric energy harvester is developed to power state of the art leadless cardiac pacemakers from cardiac motions. The energy harvester is integrated in the leadless pacemaker and is connected to the myocardium. The energy harvester converts myocardial motions to electricity to power leadless pacemakers. The energy is stored in a battery or supercapacitor and is used for pacing. The device is composed of a bimorph piezoelectric beam confined in a gray iron frame. The system is assembled at high temperature and operated at the body temperature. The mismatch in the coefficients of thermal expansion of the beam and the frame causes the beam to buckle in body temperature. This intentional buckling makes the beam unstable and improves the power production and robustness of the device. Having high natural frequency is a major problem in microelectromechanical systems energy harvesters. Considering the small size of the energy harvester, 0.5 cm3, the natural frequency is expected to be high. In our design, the natural frequency is lowered significantly using a buckled beam and a proof mass. Since the beam is buckled, the design is bistable and nonlinear, which could increase the output power. In this article, the device is analytically modeled, and the natural frequencies and mode shapes of the energy harvester are analytically derived. The terms corresponding to geometric nonlinearities are included in the electromechanical coupled governing equations. The simulations show that the device generates sufficient electricity to power leadless pacemakers.

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“…As most power sources from ambient vibration have low frequency, it is difficult to design a small harvester resulting in his natural frequency to be coincident with the resonance. Some project solutions regard to tuning a device to the resonance (Challa et al, 2008;Eichhorn et al, 2009) that can be accomplished by mechanical, magnetic and piezoelectric adjustments (Peters et al, 2009;Tang et al, 2013). The mechanical adjustment requires known excitation frequency and high cost energy to tuning, magnetic adjustment has limited tuning result and faces a limited micro sizing requirements, and the piezoelectric adjustment is a promising frontier to enhance energy harvesting capability (Zhu et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Linear matrix inequalities control driven for non-ideal power source energy harvesting

Ferreira

Chavarette

Peruzzi

2015

jtam

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The dynamic model of a linear energy harvester excited by a non-ideal power source is coupled to a controller to maximum vibration adjustment. Numerical analysis is taken to evaluate the energy harvested keeping the vibration optimized for the maximum interaction to the energy source using linear matrix inequalities for control driven. The dimensionless power output, actuation power and net output power is determined. As a result, it is possible to verify that the total energy harvested via exogenous vibration using the proposed controller is increased up to 65 times when in comparison to the open loop system.

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Broadband Vibration Energy Harvesting Techniques

Cited by 66 publications

References 71 publications

Analysis and Experimental Validation of a Piezoelectric Harvester with Enhanced Frequency Bandwidth

Analysis and Experimental Validation of a Piezoelectric Harvester with Enhanced Frequency Bandwidth

A sub-cc nonlinear piezoelectric energy harvester for powering leadless pacemakers

Linear matrix inequalities control driven for non-ideal power source energy harvesting

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