Conceptos Básicos
Residual Dynamic Mode Decomposition (ResDMD) offers a versatile approach for analyzing complex dynamical systems, as demonstrated in the study of a cylinder wake flow.
Resumen
Introduction:
ResDMD overcomes issues associated with finite truncations of Koopman operators.
New computational approach eliminates the need for two datasets in ResDMD.
Exact DMD:
Algorithm 1 summarizes the process of exact DMD.
Connection between exact DMD and Koopman operators.
EDMD:
Extended DMD generalizes DMD to capture nonlinear phenomena.
Challenges in truncating spectral problems to finite matrices.
ResDMD:
ResDMD introduces a new matrix to control truncation errors.
ResDMD provides robust and verified Koopmanism.
Kernelized EDMD:
Kernelized EDMD aims to make EDMD practical for large N.
Different choices of kernel functions impact the matrices computed.
Kernelized ResDMD:
Challenges in using kernel trick with ResDMD.
Two perspectives: Galerkin and Regression.
Examples:
Example 1: Cylinder wake flow analysis using ResDMD.
Example 2: Study of aerofoil cascades.
Example 3: Compression of transient shockwave data.
Estadísticas
ResDMD bietet eine vielseitige Methode zur Analyse komplexer dynamischer Systeme.
Neue Berechnungsmethode eliminiert die Notwendigkeit von zwei Datensätzen in ResDMD.