Topic
Bimorph
About: Bimorph is a research topic. Over the lifetime, 3339 publications have been published within this topic receiving 51880 citations.
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TL;DR: In this paper, a semi-analytical approach was developed to characterize the performance of a piezolectric bimorph cantilever with an ABH termination. But the method can be easily extended to further configurations and allows one to determine ABH harvesting capabilities when varying system parameters, in a fast and efficient way.
49 citations
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TL;DR: In this paper, a high-displacement piezoelectric actuator, employing spiral geometry of a curved PDE strip, is described, which is capable of prototyping electroceramic components with complex shapes.
Abstract: A high-displacement piezoelectric actuator, employing spiral geometry of a curved piezoelectric strip is described. The monolithic actuators are fabricated using a layered manufacturing technique, fused deposition of ceramics, which is capable of prototyping electroceramic components with complex shapes. The spiral actuators (2–3 cm in diameter) consisted of 4–5 turns of a lead zirconate titanate ceramic strip with an effective length up to 28 cm. The width was varied from 0.9 to 1.75 mm with a height of 3 mm. When driven by the electric field applied across the width of the spiral wall, the tip of the actuator was found to displace in both radial and tangential directions. The tangential displacement of the tip was about 210 μm under the field of 5 kV/cm. Both the displacement and resonant frequency of the spirals could be tailored by changing the effective length and wall width. The blocking force of the actuator in tangential direction was about 1 N under the field of 5 kV/cm. These properties are advantageous for high-displacement low-force applications where bimorph or monomorph actuators are currently employed.
49 citations
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TL;DR: In this paper, a spiral-shaped bimorph power harvester operating with coupled flexural and extensional vibration modes for applications to low frequency energy sources is proposed, and a theoretical analysis is performed and the computational results show that the spiral structure has relatively low operating frequency compared to beam power harveters of the same size.
Abstract: We propose a spiral-shaped piezoelectric bimorph power harvester operating with coupled flexural and extensional vibration modes for applications to low frequency energy sources. A theoretical analysis is performed and the computational results show that the spiral structure has relatively low operating frequency compared to beam power harvesters of the same size. It is found that to optimize the performance of a piezoelectric spiral-shaped harvester careful design is needed.
49 citations
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TL;DR: In this article, a massively parallel cantilever-probe platform is demonstrated, with 128 self-sensing and self-actuated proximal probes and readout based on piezoresistive sensors and bending control based on bimorph dc/ac actuations.
Abstract: Scanning proximity probes are uniquely powerful tools for analysis, manipulation, and bottom-up synthesis. A massively parallel cantilever-probe platform is demonstrated. 128 self-sensing and self-actuated proximal probes are discussed. Readout based on piezoresistive sensors and bending control based on bimorph dc/ac actuations are described in detail.
48 citations
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TL;DR: In this paper, a theoretical model for a piezoelectric cantilever beam energy harvester impacting against a stop is derived, which aims to develop an understanding of the vibration characteristics of the cantilevers and quantify how the electrical output of the harvesters is affected by the stop.
48 citations