A novel bistable energy harvesting concept

Scarselli, Gianfranco; Nicassio, Francesco; Pinto, Fulvio; Ciampa, Francesco; Iervolino, Onorio; Meo, Michele

doi:10.1088/0964-1726/25/5/055001

Cited by 43 publications

(19 citation statements)

References 19 publications

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“…A c c e p t e d M a n u s c r i p t = 2 (5) and, thus, considering eqs. (4) and 1, it can be written as:…”

Section: Thermo-electric Energy Harvestingmentioning

confidence: 99%

“…surrounding the engine), which can be used by thermo-electric generators (TEGs). The harvesting of mechanical vibration energy has also been considered by a number of authors [4], [5], but thermo-electric applications, when available, have showed a higher power output [6] in the range of tens of mW and good reliability [7]. TEGs are suitable for aerospace energy harvesting since they are lightweight, do not contain movable parts and provide high-energy conversion.…”

Section: Introductionmentioning

confidence: 99%

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Design and development of a heatsink for thermo-electric power harvesting in aerospace applications

Boccardi

Ciampa

Meo

2019

Smart Mater. Struct.

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In recent years, the growing interest of aerospace companies in wireless structural health monitoring systems has led to the research of new energy efficient sources and power harvesting solutions. Among available environmental power sources, temperature gradients originated at different locations of the aircraft can be used by thermo-electric generators (TEGs) to create electrical voltage. TEGs are lightweight, provide high-energy conversion and do not contain movable parts. Thermal diffusion systems, commonly known as heatsinks, can be combined with TEGs to enhance their performance by increasing heat dissipation from a high temperature surface to the ambient air. This paper focused on the enhancement of TEG performance by developing an air-cooled heatsink for low-power wireless structural health monitoring applications. The design, manufacturing and testing of the proposed thermal diffusion system was investigated by evaluating the increase of the temperature gradient between the opposite surfaces of a commercial TEG element. The thermal performance of the heatsink was assessed with numerical finite element thermal simulations and validated with experimental tests. Experimental results revealed that the proposed thermal diffusion system provided higher temperature differences and, therefore, higher output power in comparison with traditional cylindrical pin-fin heatsinks. A hybrid heat diffusion system composed by copper heatsinks and highly oriented pyrolytic graphite layers was also here proposed in order to allow TEG reaching wireless SHM operative power requirements of tens of mW and, at the same time, adapt the assembly to the complexity of aerospace SHM arrangements. Experimental results revealed that the proposed heatsink-TEG arrangement was able to generate an output power over 25 mW.

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“…A c c e p t e d M a n u s c r i p t = 2 (5) and, thus, considering eqs. (4) and 1, it can be written as:…”

Section: Thermo-electric Energy Harvestingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and development of a heatsink for thermo-electric power harvesting in aerospace applications

Boccardi

Ciampa

Meo

2019

Smart Mater. Struct.

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“…Along the same line, the effectiveness of an SMA thin film actuator to modify an airfoil shape for performance improvement was presented in [23]. Lately, the scientific and technological community is showing growing interest in bi-stable morphing concepts, thanks to the expected benefit of reducing the complexity of servo-activated control systems [24,25].…”

Section: Introductionmentioning

confidence: 94%

Static and Dynamic Performance of a Morphing Trailing Edge Concept with High-Damping Elastomeric Skin

et al. 2019

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Nature has many striking examples of adaptive structures: the emulation of birds’ flight is the true challenge of a morphing wing. The integration of increasingly innovative technologies, such as reliable kinematic mechanisms, embedded servo-actuation and smart materials systems, enables us to realize new structural systems fully compatible with the more and more stringent airworthiness requirements. In this paper, the authors describe the characterization of an adaptive structure, representative of a wing trailing edge, consisting of a finger-like rib mechanism with a highly deformable skin, which comprises both soft and stiff parts. The morphing skin is able to follow the trailing edge movement under repeated cycles, while being stiff enough to preserve its shape under aerodynamic loads and adequately pliable to minimize the actuation power required for morphing. In order to properly characterize the system, a mock-up was manufactured whose structural properties, in particular the ability to carry out loads, were also guaranteed by the elastic skin. A numerical sensitivity analysis with respect to the mechanical properties of the multi-segment skin was performed to investigate their influence on the modal response of the whole system. Experimental dynamic tests were then carried out and the obtained results were critically analysed to prove the adequacy of the adopted design approaches as well as to quantify the dissipative (high-damping) effects induced by the rubber foam on the dynamic response of the morphing architecture.

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“…Either batteries or energy harvesting sources can be used to power WSNs . Lynch and Loh and, recently, Aygurand and Gungor provided exhaustive reviews of WSNs for SHM applications.…”

Section: Introductionmentioning

confidence: 99%

Low‐power global navigation satellite system‐enabled wireless sensor network for acoustic emission localisation in aerospace components

Giannì

Balsi

Esposito³

et al. 2020

Struct Control Health Monit

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Summary Structural health monitoring systems for the localisation of acoustic emission (AE) events have been developed in the past few years for aircraft components. However, these systems still require complex and heavy electrical wiring for each sensing device and sophisticated algorithms for the localisation of AE signals, which inevitably increases both weight and costs. This paper reports the creation of a low‐power (few hundred mW) and low‐weight (~30 g) global navigation satellite system‐based wireless sensor network for the identification of AE events in aircraft structures. Each wireless node is instrumented with a low‐power micro‐controller, a radio frequency wireless transceiver, an analogue‐to‐digital converter, and a global navigation satellite system receiver for accurate time synchronisation. The AE coordinates and the speed of propagating waves are determined by using a localisation algorithm relying on time of arrival measurements. A peak amplitude detection system is implemented to process the AE data recorded by the wireless sensor network. The AE time features are locally extracted by the individual wireless modules and transferred to a remote processing unit for the execution of the localisation algorithm. Experimental results revealed that AE sources generated by low‐velocity impacts are identified with a high level of accuracy. The successful implementation of the proposed wireless sensor network demonstrates its suitability for continuous and autonomous structural health monitoring aerospace applications.

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A novel bistable energy harvesting concept

Cited by 43 publications

References 19 publications

Design and development of a heatsink for thermo-electric power harvesting in aerospace applications

Design and development of a heatsink for thermo-electric power harvesting in aerospace applications

Static and Dynamic Performance of a Morphing Trailing Edge Concept with High-Damping Elastomeric Skin

Low‐power global navigation satellite system‐enabled wireless sensor network for acoustic emission localisation in aerospace components

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