Output response identification in a multistable system for piezoelectric energy harvesting

Abstract

Abstract. In this paper we examine in detail the multiple responses of a novel vibrational energy harvester composed of a vertical bistable beam whose complex non-linear behavior is tuned via magnetic interaction. The beam was excited horizontally by a harmonic inertial force while mechanical vibrational energy is converted to electrical power through a piezoelectric element. The bistable laminate beam coupled to the piezoelectric transducer showed a variety of complex responses in terms of the beam displacement and harvested power output. The range of vibration patterns in this non-linear system included single-well oscillations and snap-through vibrations of periodic and chaotic character. Harvested power was found to be strongly dependent on the vibration pattern with nonlinearities providing a broadband response for energy harvesting. Wavelet analysis of measured voltage, displacement and velocity time histories indicated the presence of a variety of nonlinear periodic and also chaotic phenomena. To measure the complexity of response time series we applied phase portraits and determine stroboscopic points and multiscale entropy. It is demonstrated that by changing parameters such as the magnetic interaction, the characteristics of the bistable laminate harvester, such as the natural frequency, bandwidth, vibration response and peak power can be readily tailored for harvesting applications.

Acoustic Energy Harvesting Through Multilayer Piezoelectric Harvester Model

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“…Moreover from above eqaution the partial derivative is converted to differentail equations, n is normal differential equation, I describes the mode. Equation 13 gives the frequency of the model; this is achieved through invoking the mode with the Mass , VDR (Viscous Dumping Ratio) is denoted as and the electromechanical CC (Coupling Coefficient) as (14) Where , and is computed through the equation 14, 15 and 16 respectively. 20if it satisfies the condition that if two layers connected parallely opposite to one another and given potential is same as the LR(Load Resistance) then , through all the above equation we observe Electromechanical CC( coupling coefficient )which is given in equation 21.…”

Energy harvesting from coupled bending-twisting oscillations in carbon-fibre reinforced polymer laminates

“…The peak acceleration was calculated from the velocity data and saved in the calibration file using a LabView routine running on a computer. When a specific acceleration is required at a desired frequency, another routine interpolates between the nearest voltages to deliver the needed acceleration magnitude [11].…”

Research of piezoelectric energy harvesting systems based on cantilevers with irregular cross-sections

“…Introduction of non-linearity to piezoelectric energy harvesters can provide solution for the main disadvantage of energy harvesters i. e. narrow effective frequency response characteristics. Moreover, it can be found investigations on tri-stable (Zhu and et al 2017), multi-stable (Harris and et al 2017), hybrid (Yang and Towfighian, 2017) employment of multiple non-linear techniques . Unfortunately, non-linarites can provide bandwidth of piezoelectric energy harvesters only from several hertz to ten of hertz (Elvin and Erturk, 2013).…”