Computational FEA Model of A Coupled Piezoelectric Sensor and Plate Structure for Energy Harvesting

Lumentut, Mikail F.; Teh, K.K.; Howard, Ian

doi:10.1007/978-1-84628-814-2_91

Cited by 6 publications

(9 citation statements)

References 14 publications

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“…The reduced form of equation (35) due to the input base excitation can be found in appendix C. The expressions of the functional energy forms including external work can be modified in terms of the discretised mechanical and electrical shape functions. The extended kinetic energy form can be formulated by substituting equations (21) into equation (32) giving, Corresponding to equations (24) and (29), the extended potential energy form can be reduced as, (37) The extended electrical energy expression can be reduced by substituting equations (28) and (30) into equation 34as, (38) The extended virtual work in terms of the expression of non-conservative energy can be formulated by substituting equations (21) into (35) to give,…”

Section: Electromechanical Finite Element Vibration Modelling Of the mentioning

confidence: 99%

“…In the earlier studies of the electromechanical finite element response of piezoelectric power harvesting, Lumentut et al [35] initially developed an energy harvesting plate structure with the segmented piezoelectric element based on the Love-Kirchhoff plate theory for investigating the frequency and transient response behaviours. However, at the earlier stage, this model only considers the voltage output from the piezoelectric element without including the electrode effect with complete derivation of the electromechanical discretisation related to the system response.…”

Section: Introductionmentioning

confidence: 99%

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Electromechanical finite element modelling for dynamic analysis of a cantilevered piezoelectric energy harvester with tip mass offset under base excitations

Lumentut

Howard

2014

Smart Mater. Struct.

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A new electromechanical finite element modelling of a vibration power harvester and its validation with experimental studies are presented. The new contributions for modelling of the electromechanical finite element piezoelectric unimorph beam with tip mass offset under base excitation encompass five major solution techniques. These include the electromechanical discretisation, kinematic equations, coupled field equations, Lagrangian electromechanical dynamic equations and orthonormalised global matrix and scalar forms of electromechanical finite element dynamic equations. Such techniques have not been rigorously modelled previously from other researchers. There are also benefits in presenting the proposed numerical techniques. First, the proposed numerical techniques can be used for applications in many different geometrical models including MEMS power harvesting devices. Second, applying tip mass offset located after the end of the piezoelectric beam length can give a very practical design in order to avoid the direct contact of piezoelectric material because of its brittle nature. Since the surfaces of actual piezoelectric material are covered evenly with thin conducting electrodes for generating the single voltage, the new electromechanical discretisation consisting of the mechanical and electrical discretised elements is introduced. Moreover, the reduced electromechanical finite element dynamic equations can be further formulated to obtain the series form of new multimode electromechanical frequency response functions (FRFs) of the displacement, velocity, voltage, current and power including optimal power harvesting. The normalised numerical strain node and eigenmode shapes are also further formulated using numerical discretisation. Finally, the parametric numerical case studies of the piezoelectric unimorph beam under resistive shunt circuit show good agreement with the experimental studies.

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Section: Electromechanical Finite Element Vibration Modelling Of the mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electromechanical finite element modelling for dynamic analysis of a cantilevered piezoelectric energy harvester with tip mass offset under base excitations

Lumentut

Howard

2014

Smart Mater. Struct.

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“…In the power harvesting research area, novel technical concepts of the finite element methods have shown alternative solution techniques for investigating the self-powered MEMS devices using complex geometry of the laminated piezoelectric beams with electrode layers combined with the external circuit components. Only a few of the finite element selfpowered harvester research studies have been investigated by researchers during the last six years [9]- [11].…”

Section: Introductionmentioning

confidence: 99%

Comparative numerical studies of electromechanical finite element vibration power harvester approaches of a piezoelectric unimorph

Warman¹,

Lumentut²,

Howard³

2014

2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics

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Emerging micro-power harvester research using smart material components shows viable self-powered devices capable of capturing mechanical motion and converting it into useful electrical energy that can be further used to supply electrical voltage into rechargeable power storage via a power management electronic circuit. The micro-power harvesters using piezoelectric materials cover a wide range of applications for powering thin film battery technology and wireless sensor systems that can be used to monitor the health condition of machines and infrastructure and biomedical implant devices. This research focuses on the development of a novel numerical direct method technique with non-orthonormality based on the electromechanical vector transformation for modelling the selfpowered cantilevered piezoelectric unimorph beam under input base excitation. The proposed finite element piezoelectric unimorph beam equations were formulated using Hamiltonian's principle for formulating the global matrices of electromechanical dynamic equations based on the electromechanical vector transformation that can be further employed to derive the electromechanical frequency response functions. This numerical technique was modelled using electromechanical discretisation consisting of mechanical and electrical discretised elements due to the electrode layers covering the surfaces of the piezoelectric structure, giving the single voltage output. The reduced equations are based on the Euler-Bernoulli beam assumption for designing the typical power harvesting device. The proposed finite element models were also compared with orthonormalised electromechanical finite element response techniques, giving accurate results in the frequency domains.

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“…Recently, a comparison of a SDOF model with Euler-Bernoulli predictions shows the inaccuracy of oversimplifying the mechanical modeling of the vibrator [11]. In addition to analytical models, computational methods such as finite elements methods [12] and equivalent circuit models [13] have been developed for use with harvester circuit analyses and designs.…”

Section: Introductionmentioning

confidence: 99%

“…THE SYSTEM RESPONSE Equations(11),(12) and (15) suggest a new method for evaluation of the system transfer function. To determine ( with low order in general (for example, for vibration and wave propagation in continua, usually 4 n ≤ ), can be accurately calculated.…”

mentioning

confidence: 99%

Transfer Function Modeling of Distributed Piezoelectric Vibration Energy Harvesters

Tan

Lai

2009

Volume 1: 22nd Biennial Conference on Mechanical Vibration and Noise, Parts a and B

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Extensive research has been conducted on vibration energy harvesting utilizing a distributed piezoelectric beam structure. A fundamental issue in the design of these harvesters is the understanding of the response of the beam to arbitrary external excitations (boundary excitations in most models). The modal analysis method has been the primary tool for evaluating the system response. However, a change in the model boundary conditions requires a reevaluation of the eigenfunctions in the series and information of higher-order dynamics may be lost in the truncation. In this paper, a frequency domain modeling approach based in the system transfer functions is proposed. The transfer function of a distributed parameter system contains all of the information required to predict the system spectrum, the system response under any initial and external disturbances, and the stability of the system response. The methodology proposed in this paper is valid for both self-adjoint and non-self-adjoint systems, and is useful for numerical computer coding and energy harvester design investigations. Examples will be discussed to demonstrate the effectiveness of this approach for designs of vibration energy harvesters.

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Computational FEA Model of A Coupled Piezoelectric Sensor and Plate Structure for Energy Harvesting

Cited by 6 publications

References 14 publications

Electromechanical finite element modelling for dynamic analysis of a cantilevered piezoelectric energy harvester with tip mass offset under base excitations

Electromechanical finite element modelling for dynamic analysis of a cantilevered piezoelectric energy harvester with tip mass offset under base excitations

Comparative numerical studies of electromechanical finite element vibration power harvester approaches of a piezoelectric unimorph

Transfer Function Modeling of Distributed Piezoelectric Vibration Energy Harvesters

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