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Title: Learning physics-based reduced-order models from data using nonlinear manifolds

Journal Article · · Chaos: An Interdisciplinary Journal of Nonlinear Science
DOI: https://doi.org/10.1063/5.0170105 · OSTI ID:2340141

Here we present a novel method for learning reduced-order models of dynamical systems using nonlinear manifolds. First, we learn the manifold by identifying nonlinear structure in the data through a general representation learning problem. The proposed approach is driven by embeddings of low-order polynomial form. A projection onto the nonlinear manifold reveals the algebraic structure of the reduced-space system that governs the problem of interest. The matrix operators of the reduced-order model are then inferred from the data using operator inference. Numerical experiments on a number of nonlinear problems demonstrate the generalizability of the methodology and the increase in accuracy that can be obtained over reduced-order modeling methods that employ a linear subspace approximation.

Research Organization:
Univ. of Texas, Austin, TX (United States)
Sponsoring Organization:
USDOE; US Air Force Office of Scientific Research (AFOSR); US Army Research Office (ARO)
Grant/Contract Number:
SC0019303
OSTI ID:
2340141
Journal Information:
Chaos: An Interdisciplinary Journal of Nonlinear Science, Journal Name: Chaos: An Interdisciplinary Journal of Nonlinear Science Journal Issue: 3 Vol. 34; ISSN 1054-1500
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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