Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"modal identification"”.
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Modal Identification Using Smart Mobile Sensing Units
<p>The state-of-the-art in modal identification for civil structures is limited to the estimation mode shapes with a low spatial resolution. Modal coordinates are identified only at the location of sensors, which are fixed at particular locations on the structure. Increasing the number of sensors …
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Modeling and ground modal identification of space structures
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1992.
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Modeling and modal identification of jointed space structures in one- and zero-gravity environments
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Vision-based robust structural dynamic monitoring and modal identification using stationary and drone-based imaging systems.
… for estimating structural response and modal parameters. However, vision-based system identification comes with several practical challenges due to low sub-pixel structural motion, hardware constraints, environmental noise, and platform-induced disturbances in mobile sensing platform …
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Operational Modal Analysis of Rolling Tire: A Tire Cavity Accelerometer Mediated Approach
… date, there is no direct procedure available for modal analysis of rolling tires with tread patterns under realistic operating conditions. The present start-of-art laser vibrometer based non-contact measurements are limited to tread vibration measurement of smooth tires only in a lab environment. …
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Techniques for determining hidden properties of large-scale power systems
… part, a relatively new method for simultaneous modal analysis of multiple time-series signals is presented. Here, Dynamic Mode Decomposition (DMD) is successfully applied towards transmission-level power system measurements in an implementation that is able to run in real-time. Since power …
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Análise modal operacional de uma bomba centrífuga submersa utilizando a decomposição melhorada no domínio da frequência
The identification of modal parameters of electrical submersible pumps (ESP) is part of the process of increasing the reliability of this equipment, which is installed in places that are inaccessible, from a maintenance point of view, for oil exploitation, such as offshore oil wells and seabed, so …
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Parameter identification in distributed structures
… dissertation develops two new techniques for the identification of parameters in distributed-parameter systems. The first technique identifies the physical parameter distributions such as mass, damping and stiffness. The second technique identifies the modal quantities of self-adjoint …
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Identification and control of lightly damped, large space structures: an experimental evaluation
… (LSS). The problems are low damping, high modal density, and low natural frequencies of oscillation. They present a blend of difficulties which lead the experimentalist to turn to multiple-input multiple-output (MIMO) identification techniques and high performance compensators. Presented …
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Vibration Energy Harvesting for the Development of autonomous monitoring Systems. Application to railway Bridges
… frequencies without requiring full experimental modal identification. Experimental validation demonstrates that this approach increased harvested energy by up to 300%compared to traditional tuning to bridge natural frequencies. In addition, the potential of additive manufacturing for the …
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Dynamic behaviour of curved cable-stayed bridges
… theory and practice circles to develop System Identification and Modal Analysis techniques. Still today the most widely used techniques in the field of experimentations provide the use of instrumentation like an impulse hammer, an electro-dynamic shaker, mass vibrator, capable of exciting the …