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Sekar, S.A. (author), Hunt, A. (author)Additive manufacturing of sensors and actuators together with structural materials and electronics will make it possible to fabricate innovative system designs that are overly laborious to realise with conventional methods. While printing of the structural materials and electronics are advancing fast, the additive manufacturing methods for...journal article 2024
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Wang, Ningzhen (author), Baferani, Mohamadreza Arab (author), Daniels, Robert (author), Wu, Chao (author), Huo, Jindong (author), van Turnhout, J. (author), Sotzing, Gregory A. (author), Gerhard, Reimund (author), Cao, Yang (author)Multi-layer ferroelectrets consisting of fluoroethylenepropylene (FEP) copolymer and open-porous expanded polytetrafluoroethylene (ePTFE) films exhibit stable internal electret charges, high piezoelectric coefficients and heat resistance, making them promising candidates for wearable sensors or nanogenerators in body-area networks. Here,...journal article 2024
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Ghaderiaram, A. (author), Mohammadi, R. (author), Schlangen, E. (author), Fotouhi, M. (author)Engineering structures, such as bridges, wind turbines, airplanes, ships, buildings, and offshore platforms, often experience uncertain dynamic loadings due to environmental factors and operational conditions. The lack of knowledge about the load spectrum for these structures poses challenges in terms of design and can lead to either over...journal article 2024
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Alimohammadi, Hossein (author), Vassiljeva, Kristina (author), Hassan HosseinNia, S. (author), Petlenkov, Eduard (author)This article explores internally coupled resonators in metamaterial systems, focusing on mechanical and electromechanical coupling. The article provides a thorough examination of stability within the context of internally coupled resonators. It establishes stability criteria, emphasizing the importance of strictly stable systems in practical...journal article 2024
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Lu, T. (author), Wang, Ruizhi (author), Tang, Z. (author), Zou, Yiwei (author), Yue, X. (author), Liang, Yansong (author), Gong, Haoran (author), Liu, Shurui (author), Chen, Zhiyuan (author), Liu, Xun (author), Du, S. (author)This article presents a 10mV-startup-voltage thermoelectric energy harvesting system, assisted by a piezoelectric generator (PEG) as a cold starter. It exploits the fact that when a thermoelectric energy harvesting system is implemented in a place where kinetic energy is also present, the PEG starter can provide a clock signal to start the...journal article 2024
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Tuluk, A. (author), van der Zwaag, S. (author)In this work, we investigated the piezoelectric properties of BiFeO3-rich (1 − (y + x)) BiFeO3–y PbTiO3–x SrTiO3 (0.1 ≤ x ≤ 0.35; 0.1 ≤ y ≤ 0.3) bulk piezoceramics, as this system could potentially lead to the development of bulk piezoelectric ceramics that are suitable for high-temperature applications (>200 °C). Samples with various levels...journal article 2023
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Yue, X. (author), Du, S. (author)Synchronized ac-dc rectifiers are widely used for energy rectification in piezoelectric energy harvesting (PEH), which have to employ a bulky inductor or some dedicated flying capacitors for high energy conversion efficiency. This article proposes a synchronized switch harvesting on shared capacitors (SSHSC) rectifier achieving synchronized...journal article 2023
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Riccioli, F. (author), Huijer, A.J. (author), Grasso, Nicola (author), Rizzo, Cesare M. (author), Pahlavan, Lotfollah (author)Measurement of transient pressure distribution on maritime structures is important for the assessment of the hydrodynamic loads applied. The commonly used pressure sensors are mostly bulky, need to be bolted to the structure, and/or only provide point-wise measurements. In this paper, an elastic matrix layer with a network of embedded...journal article 2023
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Yue, X. (author), Du, S. (author)In the past decades, inductor-based synchronized switch harvesting on inductor (SSHI) rectifiers have been widely employed in many active rectification systems for piezoelectric energy harvesting. Although SSHI rectifiers achieve high energy extraction performance compared to passive full-bridge rectifier (FBR), the performance greatly...journal article 2023
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Li, Zhen (author), Chen, Zhiyuan (author), Wang, Jing (author), Wang, Jiawei (author), Jiang, Junmin (author), Du, S. (author), Cheng, Xu (author), Zeng, Xiaoyang (author), Han, Jun (author)This article presents a piezoelectric energy harvesting (PEH) interface circuit using a new self-bias-flip with the charge recycle (SBFR) technique without employing any additional energy reservoir. Traditional designs, including synchronous-switch harvesting on inductor (SSHI), synchronous-switch harvesting on capacitor (SSHC), synchronous...journal article 2023
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Laursen, Kjeld (author), Zamani, M. (author), Rezaeiyan, Y. (author), Hosseini, Seyedsina (author), Mondal, Tanmay (author), Corbett, Brian (author), Ouagazzal, Abdel Mouttalib (author), Amalric, Marianne (author), Moradi, Farshad (author)This brief presents an ultrasonically powered micro-system for deep tissue optogenetic stimulation. The developed system is composed of a Base for Powering and Controlling (BPC) and an implantable Dust for optogenetics and drug delivery. The Dust consists of a piezoelectric crystal, a rectifier chip, and a micro-scale custom-designed light...journal article 2023
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Xie, J. (author), Xu, Y. (author), Wan, Z. (author), Ghaderiaram, A. (author), Schlangen, E. (author), Šavija, B. (author)The high deformation capacity of auxetic cementitious cellular composites (ACCCs) makes them promising for strain-based energy harvesting applications in infrastructure. In this study, a novel piezoelectric energy harvester (PEH) with ACCCs and surface-mounted PVDF film based on strain-induced piezoelectric mechanisms has been designed,...journal article 2023
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Rashidi, A. (author), Zamani, M. (author), Mondal, Tanmay (author), Hosseini, Seyedsina (author), Laursen, Kjeld (author), Corbet, Brian (author), Moradi, Farshad (author)This letter presents an ultrasonically powered dual-wavelength optogenetic device that targets simultaneous excitation and inhibition of neural activities, or in a broader sense, optical stimulation in two distinct wavelengths for targeting different populations of neurons. This can be applied to a variety of neurological disorders. The...journal article 2023
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Unnikrishnan, Gokul Krishna (author), Sharma, S. (author), Pathak, Himanshu (author), Chauhan, Vishal Singh (author), Jain, Satish Chandra (author)To accurately analyze the fracture behavior of piezoceramics at small length scales, flexoelectricity must be considered along with piezoelectricity. Due to its dependence on size, flexoelectricity predominates at the micro- and nano-length scales. Additionally, crack tips having the largest strain gradient state cause large flexoelectricity...journal article 2023
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van Spengen, W.M. (author)Piezo actuators have very desirable properties, such as a high stiffness and extreme position resolution, but suffer from electromechanical resonances that complicate their use in high-speed applications. These resonances can be minimized by using resistive or resistive-inductive damping. In this paper a comprehensive theory is presented...journal article 2022
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Villalba, Víctor (author), van Es, Johannes (author), Kuiper, J.M. (author), Gill, E.K.A. (author)Piezoelectric actuators are a very attractive technology for active optics mechanisms in space applications due to their very high precision and reliability. However, self-heating of these actuators may be limit their use in space or under high loads, due to the limited ability to evacuate heat. Test procedures that reproduce the operational...journal article 2022
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Stuber, V.L. (author), Mkhoyan, T. (author), De Breuker, R. (author), van der Zwaag, S. (author)This paper presents an experimental method to detect in-situ the location of transition on a multi-segmental trailing edge camber morphing wing during synchronous and asynchronous morphing. The wing consists of six independently morphing segments with two of the segments instrumented with eight embedded piezoelectric sensors distributed...journal article 2022
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Poudel, Prakash (author), Sharma, S. (author), Ansari, Mohamed Nainar Mohamed (author), Kumar, Pushpendra (author), Ibrahim, Sobhy M. (author), Vaish, Rahul (author), Kumar, Rajeev (author), Thomas, Paramanandam (author)In this study, a method for the bacterial disinfection of drinking water in the water storage systems based on the electric potential generated from a piezoelectric wind energy harvester is presented. First, an efficient galloping piezoelectric wind energy harvester is designed by adding curve- shaped attachments to the bluff body of the...journal article 2022
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Huijer, A.J. (author), Zhang, X. (author), Kassapoglou, C. (author), Pahlavan, Lotfollah (author)Marine propellers made of fibre-reinforced composites have demonstrated the potential to outperform metallic propellers in terms of efficiency and under-water noise radiation. For full realisation of this potential in a tailored design process with realistic constraints, accurate information on the hydrodynamic loads acting on composite...journal article 2022
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Martinelli, Cristiano (author), Coraddu, A. (author), Cammarano, Andrea (author)Most of the optimisation studies of Vibration Energy Harvesters (VEHs) account for a single output quantity, e.g. frequency bandwidth or maximum power output, but this approach does not necessarily maximise the system efficiency. In those applications where VEHs are suitable sources of energy, to achieve optimal design it is important to...journal article 2022