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Showing 1 to 16 of 16 for “"Unimorph"”.
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Design, fabrication and characterisation of free-standing thick-film piezoelectric cantilevers for energy harvesting
… composite cantilevers in the form of unimorphs were fabricated and characterised for their mechanical and electric properties. The unimorph structure consists of a pair of silver/palladium (Ag/Pd) electrodes sandwiching a laminar layer of lead zirconate titanate (PZT). An extended …
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Development and Characterization of a Mechanically Prestressed Piezoelectric Composite
… traditional piezo actuation systems, such as unimorphs or stack actuators, a growing number of research groups are examining the increased performance derived from the mechanical advantage, and enhanced domain rotation, found in prestressed unimorph designs. Prestressed devices, like Thunder® …
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Aerodynamic and Electromechanical Design, Modeling and Implementation Of Piezocomposite Airfoils
… response of Macro-Fiber Composite based unimorph and bimorph structures is analyzed. A distributed parameter electromechanical model is presented for interdigitated piezocomposite unimorph actuators. Necessary structural features that result in large electrically induced deformations are …
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Effects of stress on material properties, intrinsic and extrinsic behavior, and electromechanical response of stress-biased actuators
… actuators, including Thunder™ (THin UNimorph Driver and sEnsoR). Thunder™ is a composite laminate actuator based on an elastic metal layer and a piezoelectric wafer bonded together with a thermoplastic material (LaRC-SI). On cooling from the processing temperature, the difference in …
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Shape Optimization of Microfiber Composite Energy Harvesters
… material, microfiber composite (MFC), in a unimorph configuration was setup in Matlab using the governing equations of motions of a coupled electromechanical system. The equations of motion were derived using Hamilton’s variational principles and constitutive relations of a piezoelectric …
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Augmented material interfaces : exploring bidirectional microinteractions enabled by radical elements
… we present a thin film shape-changing composite uniMorph. It is based on a flexible circuit composite that is able to actuate its own shape by combining the thermo- electric characteristics of copper with the high thermal expansion rate of ultra-high molecular weight polyethylene. Finally, a …
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Macro Fiber Composite Actuated Unmanned Air Vehicles: Design, Development, and Testing
… capability of this actuator on fiberglass unimorph was modeled by the Rayleigh-Ritz method and quantified by experimentation. Wind tunnel tests were performed to compare conventional trailing edge control surface effectiveness to an MFC actuated wing section. The continuous surface of the …
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Gesture sensing with flexural ultrasonic transducers
… demonstrates the capability of a mesoscale piezo unimorph array to detect and distinguish between tap, touch, and swipe contact gestures and to detect a hovering object, albeit in a limited range, above a metal substrate. There are opportunities for improvements in circuitry, sensor design, and …
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Design and modeling of a PZT thin film based piezoelectric micromachined ultrasonic transducer (PMUT)
… solve for the plate deflection of a bimorph and unimorph PMUT with an arbitrary number of circular or ring electrodes. The resulting solution is much simpler and more flexible than previously published solution techniques enabling the optimization of electrode configuration for large deflection …
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The Lemmatisation of The York-Toronto-Helsinki Parsed Corpus of Old English Poetry with a Relational Database of Old English Dictionaries
… (BT), VariOE, Norna, Freya, ParCorEv2, Unimorph, and INESS. To that aim, the IOED correlates the headwords and attested spellings of these sources, providing a streamlined, comprehensive framework for systematically comparing and selecting the most suitable lemma for each attested …
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Vibration Energy Harvesting for the Development of autonomous monitoring Systems. Application to railway Bridges
… from a variational formulation for bimorph and unimorph cantilever configurations, enabling the development of a novel efficient design optimisation procedure. The models are validated through numerical simulations, laboratory testing, and in-field experiments on railway bridges on an in-service …
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Deformation and Force Characteristics of Laminated Piezoelectric Actuators
… of piezoelectric material. THUNDER (THin layer UNimorph ferroelectric DrivER and sensor) and LIPCA (LIghtweight Piezo-composite Curved Actuator) actuators, which consist of layers of metal, adhesive and piezoelectric material, and carbon-epoxy, glass-epoxy and piezoelectric material, …
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Nanoparticle-based Organic Energy Storage with Harvesting Systems
… The self sustaining energy harvesting from the unimorph composite beam is exploited. The effects of different operational parameters including the optimum angle of attack, wind speed and load resistance are determined.
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Grammatical analysis of Maltese text
… The data-set for this model was adapted from UniMorph, a universal morphological annotation project. The research focuses on creating and comparing a number of computational models. The baseline approach builds a Recurrent Neural Network (RNN) from scratch and uses the training data to build a …
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Finite Element Modeling of Macro Fiber Composite Actuators with Application to Wing De-icing
… tip displacement and energy harvesting of a unimorph cantilever beam under MFC actuation are performed, which are then followed by experiments that are conducted to validate the analytical and modeling results. After successfully validating the results, it was concluded that the ABAQUS model …
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Vibration Analysis and Control of an Inflatable Toroidal Satellite Component Using Piezoelectric Actuators and Sensors
… forces due to piezoelectric actuators in unimorph and bimorph configurations and include their mass and stiffness effects in the governing equations. A sensor equation is also developed for the shell. The actuator and sensor equations are then written in terms of modal displacements and …