Data-driven linearization of dynamical systems

G Haller, B Kaszás - Nonlinear Dynamics, 2024 - Springer
Dynamic mode decomposition (DMD) and its variants, such as extended DMD (EDMD), are
broadly used to fit simple linear models to dynamical systems known from observable data …

Data-assisted non-intrusive model reduction for forced nonlinear finite elements models

M Cenedese, J Marconi, G Haller, S Jain - Nonlinear Dynamics, 2024 - Springer
Spectral submanifolds (SSMs) have emerged as accurate and predictive model reduction
tools for dynamical systems defined either by equations or data sets. While finite-elements …

[HTML][HTML] Nonlinear model reduction to random spectral submanifolds in random vibrations

Z Xu, RS Kaundinya, S Jain, G Haller - Journal of Sound and Vibration, 2025 - Elsevier
Dynamical systems in engineering and physics are often subject to irregular excitations that
are best modeled as random. Monte Carlo simulations are routinely performed on such …

Bifurcation analysis of quasi-periodic orbits of mechanical systems with 1: 2 internal resonance via spectral submanifolds

H Liang, S Jain, M Li - Nonlinear Dynamics, 2024 - Springer
A 1: 2 internally resonant mechanical system can undergo secondary Hopf (Neimark-
Sacker) bifurcations, resulting in a quasi-periodic response when the system is subject to …

Active vibration control of nonlinear flexible structures via reduction on spectral submanifolds

C Shen, M Li - Nonlinear Dynamics, 2025 - Springer
Large amplitude vibrations can cause hazards and failure to engineering structures. Active
control has been an effective strategy to suppress vibrations, but it faces great challenges in …

Modeling Nonlinear Dynamics from Videos

A Yang, J Axås, F Kádár, G Stépán, G Haller - arXiv preprint arXiv …, 2024 - arxiv.org
We introduce a method for constructing reduced-order models directly from videos of
dynamical systems. The method uses a non-intrusive tracking to isolate the motion of a user …

Reducing Finite Element Models of Bolted Joints using Spectral Submanifolds

AA Morsy, Z Xu, P Tiso, G Haller - arXiv preprint arXiv:2409.05012, 2024 - arxiv.org
Bolted joints can exhibit significantly nonlinear dynamics. Finite Element Models (FEMs) of
this phenomenon require fine spatial discretizations, inclusion of nonlinear contact and …

Data-driven modeling of mechanical systems on spectral submanifolds in theory and practice

J Axås - 2024 - research-collection.ethz.ch
In this thesis, we discuss how to apply spectral submanifold (SSM) theory to obtain low-
dimensional models of smooth dynamical systems from data. To this end, we build on the …

Discovering Dominant Dynamics for Nonlinear Continuum Robot Control

JI Alora, M Cenedese, G Haller, M Pavone - 2024 - researchsquare.com
Continuum robots, which emulate biological organisms' dexterity and flexibility, hold
transformative potential for terrestrial and extraterrestrial applications. While these …