A 120°C 20G-compliant vibration energy harvester for aeronautic environments

Gasnier, Pierre; Boucaud, Matthieu; Gallardo, M. I.; Willemin, J.; Boisseau, S.; Morel, Adrien; Gibus, David; Moreau, M.

doi:10.1088/1742-6596/1407/1/012118

Cited by 6 publications

(8 citation statements)

References 7 publications

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“…Temperature variations might also be a cause for shifts in the PEH characteristics and mismatches between the harvester resonance frequency and the vibration frequency [27]. [49] shows that an increase of temperature (from 90°C to 120°C) leads to a shift of the resonance frequency from 1167Hz to 1108Hz (5.5% frequency shift) of a PZT-based harvester. In [50], the resonance frequency shifts from 290.4Hz to 281.8Hz (3% frequency shift) when the temperature is increased from 20°C to 100°C.…”

Section: Thermal Stability Aging and Vibration Frequency Shiftsmentioning

confidence: 99%

A comparative study of electrical interfaces for tunable piezoelectric vibration energy harvesting

Morel

Brenes

Gibus

et al. 2022

Smart Mater. Struct.

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The present work deals with tunable electrical interfaces able to enhance both the harvested power and bandwidth of piezoelectric vibration energy harvesters. The aim of this paper is to propose a general, normalized, and unified performance evaluation (with respect to the harvested power and bandwidth) of the various electrical strategies that can tune the harvester’s frequency response. By mean of a thorough analysis, we demonstrate how such interfaces influence the electromechanical generator response through an electrically-induced damping and an electrically-induced stiffness. The choice of the strategy determines these two electrical quantities, and thus the achievable frequency response of the system. Thereafter, we introduce a collection of graphical and analytical tools to compare and analyze single- and multi-tuning electrical strategies, including a qualitative performance evaluation of existing strategies. Finally, we establish a unified comparison of single- and multiple-tuning strategies which is supported by the definition and evaluation of a new optimization criterion. This comparison reveals which strategy performs best depending on the electromechanical coupling of the piezoelectric harvester and on the losses in the electrical interface. Furthermore, it quantifies the power and bandwidth gain brought by single- and multi-tuning strategies. Such quantitative criterion provides guidance for the choice of a harvesting strategy in any specific applicative case.

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Section: Thermal Stability Aging and Vibration Frequency Shiftsmentioning

confidence: 99%

A comparative study of electrical interfaces for tunable piezoelectric vibration energy harvesting

Morel

Brenes

Gibus

et al. 2022

Smart Mater. Struct.

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“…Furthermore, temperature variations and/or aging of the harvester may alter the resonant frequency of the harvester. For instance, both Wozniak et al [57] and Gasnier et al [8] measured drifts in the resonant frequencies of their harvesters dedicated to aeronautic environment when subjected to temperature variations. Wozniak et al measured a shift in the resonant frequency of their PMN-PT harvester of -7.0% between 0°C and 70°C while Gasnier et al measured a shift of -5.6% with a PZT-5A harvester between 90°C and 120°C.…”

Section: Operation With a Dedicated Integrated Circuitmentioning

confidence: 99%

“…This situation is encountered in many applications as shown by Rantz and Roundy [5]: one third of the vehicle vibration signals presented in the NiPS Laboratory "Real Vibration" database [4] exhibit a dominant vibration frequency that varies. This mismatch can also occur when the resonant frequency of the harvester drifts due to the aging of materials and assemblies [6] or temperature variations of the environment [7,8]. In response to these frequency mismatches a new trend has recently emerged with the development of electrical techniques [9,10] and power management circuits [11,12] able to tune the resonant frequency of piezoelectric cantilevers thanks to the coupling effect between the mechanical dynamics and the electrical circuit.…”

Section: Introductionmentioning

confidence: 99%

Strongly coupled piezoelectric cantilevers for broadband vibration energy harvesting

et al. 2020

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Vibration energy harvesters based on piezoelectric resonators are promising for powering Wireless Sensors Nodes (WSNs). Yet, any mismatch between the resonant frequency of traditional harvesters and the vibration frequency can drastically decrease the scavenged power and make them ineffective. Electrical techniques able to tune the resonant frequency of piezoelectric harvesters has been proposed as a solution and opens up new perspectives. To be fully competitive, this approach requires energy harvesters with very strong global electromechanical coupling coefficients k² (>10%), whose design remains a challenge today. This work reports on a method to design strongly coupled piezoelectric cantilevers thanks to an analytical approach based on the Rayleigh-Ritz method and a two degrees-of-freedom model, which considers the proof mass inertia effects. Through an expression of the coupling coefficient, we provide design guidelines, which are experimentally validated. We show that a long proof mass is a very effective configuration to maximize the global electromechanical coupling coefficient and consequently the frequency bandwidth of the system. Three proposed prototypes exhibit some of the strongest squared global electromechanical coupling coefficients k² of the state-of-the-art of piezoelectric harvesters (16.6% for the PMN-PT cantilever, 11.3% and 16.4% for the narrow and wide PZT-5A cantilevers respectively) and demonstrate a wide bandwidth behavior (10.1%, 7.8% and 11.3% of the central frequency respectively). Using a strongly coupled prototype based on PZT-5A leveraged by a dedicated integrated circuit, we experimentally show that it can harvest enough power (more than 100µW) to supply a WSN over a frequency bandwidth as large as 21%.

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“…The same procedure and VEH have been used in simulations and in measurements. This VEH (figure 1(a)) has been presented in [15] and has been specially designed for high temperatures and high accelerations (120 °C and 20G compliant).…”

Section: Validation Proceduresmentioning

confidence: 99%

“…The TLCM is presented in section 2 with the theoretical considerations on which it relies. The method is validated in section 3 using the VEH presented in [15] (figure 1(a)). It is firstly validated with finite element simulations, then with experimental results.…”

Section: Introductionmentioning

confidence: 99%

Efficient optimal load and maximum output power determination for linear vibration energy harvesters with a two-measurement characterization method

Freychet

Boisseau

Frassati

et al. 2019

Smart Mater. Struct.

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This paper presents a new characterization method allowing to efficiently characterize vibration energy harvesters (VEH). It enables to determine for example the optimal electrical loads at any frequency or the maximum output power; and this with only two measurements (two frequency sweeps on a shaker with two well-chosen electrical loads). This technique, while being timeefficient, greatly simplifies the determination of the maximum output power of VEH without requiring a measurement of the output power with many resistors; it is also compatible with finite element simulations. The proposed methodology has been tested and validated on a piezoelectric VEH.

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A 120°C 20G-compliant vibration energy harvester for aeronautic environments

Cited by 6 publications

References 7 publications

A comparative study of electrical interfaces for tunable piezoelectric vibration energy harvesting

A comparative study of electrical interfaces for tunable piezoelectric vibration energy harvesting

Strongly coupled piezoelectric cantilevers for broadband vibration energy harvesting

Efficient optimal load and maximum output power determination for linear vibration energy harvesters with a two-measurement characterization method

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