Výsledky vyhledávání - "Samuel E. Otto"

Inadequacy of Linear Methods for Minimal Sensor Placement and Feature Selection in Nonlinear Systems: A New Approach Using Secants

Autor: Samuel E. Otto, Clarence W. Rowley

Publikováno v: Journal of Nonlinear Science. 32

Sensor placement and feature selection are critical steps in engineering, modeling, and data science that share a common mathematical theme: the selected measurements should enable solution of an inverse problem. Most real-world systems of interest a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65e9ef992581220a6a50d1f8aa44b929
https://doi.org/10.1007/s00332-022-09806-9

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Koopman Operators for Estimation and Control of Dynamical Systems

Autor: Samuel E. Otto, Clarence W. Rowley

Publikováno v: Annual Review of Control, Robotics, and Autonomous Systems. 4:59-87

A common way to represent a system's dynamics is to specify how the state evolves in time. An alternative viewpoint is to specify how functions of the state evolve in time. This evolution of functions is governed by a linear operator called the Koopm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a04f395be24d46cc4e7b489a1b4d1059
https://doi.org/10.1146/annurev-control-071020-010108

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Data-Driven Model Predictive Control using Interpolated Koopman Generators

Autor: Clarence W. Rowley, Sebastian Peitz, Samuel E. Otto

Publikováno v: SIAM Journal on Applied Dynamical Systems. 19:2162-2193

In recent years, the success of the Koopman operator in dynamical systems analysis has also fueled the development of Koopman operator-based control frameworks. In order to preserve the relatively low data requirements for an approximation via Dynami

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f0a16efae82cc042716afc079d8cf05b
https://doi.org/10.1137/20m1325678

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Linearly Recurrent Autoencoder Networks for Learning Dynamics

Autor: Samuel E. Otto, Clarence W. Rowley

Publikováno v: SIAM Journal on Applied Dynamical Systems. 18:558-593

This paper describes a method for learning low-dimensional approximations of nonlinear dynamical systems, based on neural network approximations of the underlying Koopman operator. Extended Dynamic...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a47f68097eaef90dbfd6f9d6b4b50b8d
https://doi.org/10.1137/18m1177846

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Distortion Correction Protocol for Digital Image Correlation after Scanning Electron Microscopy: Emphasis on Long Duration and Ex-Situ Experiments

Autor: Alberto W. Mello, T. A. Book, Samuel E. Otto, Christopher J. Gilpin, Michael D. Sangid, Andrea Nicolas

Publikováno v: Experimental Mechanics. 57:1395-1409

Recently, scanning electron microscopy (SEM) has been used for digital image correlation (DIC), as micrographs can be acquired with high magnification, providing improved resolution to quantify strain heterogeneities. However, it has been shown by re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c57a07eb5323f5643eb5959767495a0f
https://doi.org/10.1007/s11340-017-0303-1

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Analysis of amplification mechanisms and cross-frequency interactions in nonlinear flows via the harmonic resolvent

Autor: Clarence W. Rowley, Alberto Padovan, Samuel E. Otto

We propose a framework that elucidates the input–output characteristics of flows with complex dynamics arising from nonlinear interactions between different time scales. More specifically, we consider a periodically time-varying base flow, and perf

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bce77319252821179a72967cdfafa395
http://arxiv.org/abs/1911.10179

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Inward-Turning Streamline-Traced Inlet Design Method for Low-Boom, Low-Drag Applications

Autor: Charles J. Trefny, John W. Slater, Samuel E. Otto

Publikováno v: Journal of Propulsion and Power. 32:1178-1189

A new design method for inward-turning streamline-traced inlets is presented. Resulting designs are intended for low-supersonic low-drag low-boom applications such as that required for NASA’s proposed low-boom flight demonstration aircraft. A criti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c33fb2772fe483aa4df2ef1f5cf03f04
https://doi.org/10.2514/1.b36028

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