Degradation of bimorph piezoelectric bending beams in energy harvesting applications

Pillatsch, Pit; Xiao, Biao; Shashoua, N; Gramling, Hannah M.; Yeatman, Eric M.; Wright, Paul K.

doi:10.1088/1361-665x/aa5a5d

Cited by 38 publications

(34 citation statements)

References 44 publications

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“…The four MFC piezoelectric beam specimens will be used for cyclic loading and actuation function degradation tests of cyclic loads with stress amplitudes 12 MPa, 18 MPa, 24 MPa and 30 MPa, respectively. The experimental results of the sensing function degradation test for the MFC sensor show that, when the MFC sensing function degradation degree is greater than 10%, which can be characterized by the reduction of its output voltage, it is considered that its function degradation is observable for the corresponding test case [12]. Hence, in the present test when the measured index A is greater than 90%, which indicates that the actuation function degradation degree is less than 10%, it will be considered that there is no actuation function degradation for the corresponding load cycles.…”

Section: Actuation Function Degradation Test Of Mfc Actuator Undergoimentioning

confidence: 99%

“…Based on experimental results, 600 µε was proposed to be the upper limit of safe strain amplitude for a reliable performance of MFC in the energy harvesting system. P. Pillatsch et al [12] investigated the degradation of bimorph piezoelectric bending beams under symmetrical and asymmetrical sinusoidal loading. It is concluded that the degradation of the bimorph piezoelectric patch will bring a loss in output power and the shift in resonance frequencies, and micro-cracking was shown to occur predominantly in piezoelectric layers under tensile stress.…”

Section: Introductionmentioning

confidence: 99%

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Experiment and Modeling on Macro Fiber Composite Stress-Induced Actuation Function Degradation

2019

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The effect of stress depolarization will cause actuation function degradation of a piezoelectric actuator, which can eventually trigger function failure of the piezoelectric smart structure system. In the present study, we experimentally demonstrate the degradation process of the actuation function of the Macro Fiber Composite (MFC) piezoelectric actuator. Actuation function degradation data of MFC actuators undergoing cyclic loads with four different stress amplitudes have been measured. Based upon the experimental results, the radial basis function (RBF) neural network learning algorithm was adopted to establish a neural network model, in order to predict the actuation function degenerative degree of the MFC actuator, undergoing arbitrary cyclic load within the concerned stress amplitude range. The maximum relative error between the predicted result and our experimental result is 4%.

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Section: Actuation Function Degradation Test Of Mfc Actuator Undergoimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experiment and Modeling on Macro Fiber Composite Stress-Induced Actuation Function Degradation

2019

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“…Buckling of thin-walled composite beams under axial loads is also investigated [11]. It is shown that the pre-loading of the piezoceramic beams opens the opportunity for increased life time of devices in energy harvesting [12]. In the paper [13] it is reported that the preloading force need not to be constant; in the new types of magnetorheological elastomers for vibration isolators the magnetic attraction force is utilized to change the preloading.…”

Section: Introductionmentioning

confidence: 99%

Variable Preloading Force in an Archetypal Oscillator

et al. 2019

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In this paper, the influence of the time variable preloading force on the vibration of an archetypal oscillator is investigated. The oscillator is modeled as a slider-string system which is mathematically described with a second order nonlinear differential equation with time variable parameters. An approximate procedure for solving the equation is introduced. It is based on the exact solution of the pure nonlinear equation in the form of the Ateb function. The obtained result gives the vibration amplitude and phase variation of the oscillator depending on the preloading force variation. Based on this result, the procedure for regulation of the preloading force as the function of the required vibration amplitude decrease is developed. It is concluded that the preloading force may be used as a control parameter of the oscillator.

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“…An oscillating force was applied on the piezoelectric beams using direct impact generated by stoppers on a rotating host. A prototype with 12 bimorphs generated 10.2 mW at 6 Hz, but the direct impact is detrimental for the system stability and may cause material degradation …”

Section: Introductionmentioning

confidence: 99%

“…A prototype with 12 bimorphs generated 10.2 mW at 6 Hz, but the direct impact is detrimental for the system stability and may cause material degradation. [19] To avoid direct impacts, Khameneifar et al used the gravitational force of the tip mass on a PE beam to induce beam vibration from rotation. [20] The beam was mounted on a rotational host, whose rotational axis is perpendicular to the direction of gravity.…”

Section: Introductionmentioning

confidence: 99%

Comparison and Scaling Effects of Rotational Micro‐Generators using Electromagnetic and Piezoelectric Transduction

Yeatman

2018

Energy Tech

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Rotational energy is widely distributed or easily acquirable from other energy sources (fluid flow, machine operation or human motion) in many industrial and domestic scenarios. At small scales, power generation from such rotational ambient sources can enable many autonomous and self‐reliant sensing applications. In this paper, three typical types of micro‐generators (energy harvesters), namely electromagnetic (EMREHs), piezoelectric resonant (PRREHs) and piezoelectric non‐resonant rotational energy harvesters (PNRREHs) are discussed and compared in terms of device dimensions and operation frequencies. Theoretical models are established for each type to calculate maximum achievable output power as a function of device dimension and operating frequency. Using these theoretical models, scaling laws are established for each type to estimate the achievable output. The EMREHs have a strong scaling effect both on device dimension (as L5) and on operating frequency (as ω2), whereas the PNRREHs are less so (L2.5ω0.5). PRREHs have a narrow band‐width as resonant harvesters, and are ideal for cases where the excitation frequency is constant. This study provides a guideline for selection and design of rotational energy harvesters (REH) when the device dimension and operating frequency are defined. The proposed scaling laws offer a convenient method to estimate the harvester performance for different dimensions and operating frequencies.

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Degradation of bimorph piezoelectric bending beams in energy harvesting applications

Cited by 38 publications

References 44 publications

Experiment and Modeling on Macro Fiber Composite Stress-Induced Actuation Function Degradation

Experiment and Modeling on Macro Fiber Composite Stress-Induced Actuation Function Degradation

Variable Preloading Force in an Archetypal Oscillator

Comparison and Scaling Effects of Rotational Micro‐Generators using Electromagnetic and Piezoelectric Transduction

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