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Closed-loop dynamic shape control of a flexible beam
SPIE Proceedings, 1990An experimental implementation of a new distributed parameter shape control design methodology is presented. The technique is based upon the input/output representation of distributed parameter systems in a spatially- and temporallytransformed frequency space.
Shawn E. Burke, James E. Hubbard, Jr.
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Dynamic high power laser beam shaping device
High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VIII, 2019The performance achievable in laser material processing depends not only on the optical power of the source but also on the quality (for example in terms of the beam-parameter-product) of the beam incident on the workpiece. Therefore, to optimize the production yield, flexible laser machines must have the possibility to change the beam quality ...
Marta Bassignana +3 more
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Dynamic control of laser beam shape for heat treatment
Journal of Laser Applications, 2018One of the major challenges for laser hardening is dealing with the geometrical singularities of the treated components. The problem arises from the laser hardening of uneven surfaces such as those with sharp edges or holes. In these cases, due to the differences in the surrounding volume of the material, overheating problems often appear leading to ...
Paula Sancho +4 more
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Nonlinear Strain Measures, Shape Functions and Beam Elements for Dynamics of Flexible Beams
Multibody System Dynamics, 1999zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Analysis of the behavior of a Shape Memory Alloy beam under dynamical loading
European Journal of Mechanics - A/Solids, 2001zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Collet, Manuel +2 more
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Dynamic beam shaping with coherent beam combining
PhotonicsViewsAbstractCoherent beam combining (CBC) is a method of enhancing laser power. It has recently transitioned to industrial applications, unveiling new possibilities in laser technology. CBC merges multiple laser channels from a single source, controlling their phase to create constructive or destructive interference.
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Applied Physics Letters, 2007
The authors demonstrate a technique to optically imprint through linear beam propagation an index pattern in the bulk of a photorefractive crystal capable of beam reshaping and waveguiding. The procedure is based on the separation into two distinct phases of the photosensitive and refractive response, so that light is in all cases undergoing only ...
DEL RE, EUGENIO +4 more
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The authors demonstrate a technique to optically imprint through linear beam propagation an index pattern in the bulk of a photorefractive crystal capable of beam reshaping and waveguiding. The procedure is based on the separation into two distinct phases of the photosensitive and refractive response, so that light is in all cases undergoing only ...
DEL RE, EUGENIO +4 more
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Nonlinear Dynamics of Flexible L-Shaped Beam Based on Exact Modes Truncation
International Journal of Bifurcation and Chaos, 2017Nonlinear dynamics of flexible multibeam structures modeled as an L-shaped beam are investigated systematically considering the modal interactions. Taking into account nonlinear coupling and nonlinear inertia, Hamilton’s principle is employed to derive the partial differential governing equations of the structure.
Tian-Jun Yu +2 more
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Dynamic analysis of a shape memory alloy beam with pseudoelastic behavior
Journal of Intelligent Material Systems and Structures, 2018This article aims at developing a semi-analytic approach for studying the free and forced vibrations of a pseudoelastically behaving shape memory alloy beam. Based on the Euler–Bernoulli beam theory, equations of motion were derived through Hamilton principle, and the obtained partial differential equations were decomposed by applying the Galerkin ...
Reza Razavilar +3 more
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Dynamic lithography of v-shaped antennas for beam steering applications
SPIE Proceedings, 2014A method to generate an optical metasurface is developed. In our experimental setup, we use a pump-probe technique, where the pump beam is used to project patterns of v-shaped antennas on the surface of a silicon substrate. In the areas illuminated with the images of v-shaped antennas electron-hole pairs are created. Therefore, the antenna structures
Tamelia Ali +9 more
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