Three-dimensional deep learning-based reduced order model for unsteady flow dynamics with variable Reynolds number

R Gupta, R Jaiman - Physics of Fluids, 2022 - pubs.aip.org
In this article, we present a deep learning-based reduced order model (DL-ROM) for
predicting the fluid forces and unsteady vortex shedding patterns. We consider the flow past …

Sampling and resolution characteristics in reduced order models of shallow water equations: Intrusive vs nonintrusive

SE Ahmed, O San, DA Bistrian… - International Journal for …, 2020 - Wiley Online Library
We investigate the sensitivity of reduced order models (ROMs) to training data spatial
resolution as well as sampling rate. In particular, we consider proper orthogonal …

Isogeometric analysis and proper orthogonal decomposition for parabolic problems

S Zhu, L Dedè, A Quarteroni - Numerische Mathematik, 2017 - Springer
We investigate the combination of Isogeometric Analysis (IGA) and proper orthogonal
decomposition (POD) based on the Galerkin method for model order reduction of linear …

Infinite-dimensional bilinear and stochastic balanced truncation with explicit error bounds

S Becker, C Hartmann - Mathematics of Control, Signals, and Systems, 2019 - Springer
Along the ideas of Curtain and Glover (in: Bart, Gohberg, Kaashoek (eds) Operator theory
and systems, Birkhäuser, Boston, 1986), we extend the balanced truncation method for …

Model reduction by balanced truncation for systems with nuclear Hankel operators

C Guiver, MR Opmeer - SIAM Journal on Control and Optimization, 2014 - SIAM
We prove the H-infinity error bounds for Lyapunov balanced truncation and for optimal
Hankel norm approximation under the assumption that the Hankel operator is nuclear. This …

Reduced order modeling of fluid flows: Machine learning, Kolmogorov barrier, closure modeling, and partitioning

SE Ahmed, S Pawar, O San, A Rasheed - AIAA Aviation 2020 Forum, 2020 - arc.aiaa.org
In this paper, we put forth a long short-term memory (LSTM) nudging framework for the
enhancement of reduced order models (ROMs) of fluid flows utilizing noisy measurements …

Finite-rank ADI iteration for operator Lyapunov equations

MR Opmeer, T Reis, W Wollner - SIAM Journal on Control and Optimization, 2013 - SIAM
We give an algorithmic approach to the approximative solution of operator Lyapunov
equations for controllability. Motivated by the successfully applied alternating direction …

A POD projection method for large-scale algebraic Riccati equations

B Kramer, JR Singler - Numerical Algebra, Control and …, 2016 - aimsciences.org
The solution of large-scale matrix algebraic Riccati equations is important for instance in
control design and model reduction and remains an active area of research. We consider a …

A mix balanced-modal truncations for power systems model reduction

M Belhocine, B Marinescu - 2014 European Control …, 2014 - ieeexplore.ieee.org
In this paper, a new model reduction technique mixing the balanced and modal truncations
is proposed for power systems. Usually, only the power transmission lines are approximated …

[PDF][PDF] Model reduction by balanced truncation

C Guiver - 2012 - core.ac.uk
Model reduction by balanced truncation for bounded real and positive real input-stateoutput
systems, known as bounded real balanced truncation and positive real balanced truncation …