Working with Reduced-Order Models
COMSOL Multiphysics provides functionality to generate linearized reduced-order models based on eigenvalue solutions. The reduced system has much fewer degrees of freedom (DOFs) than the full model. See the
Modal Reduced-Order Model
and
The Modal Solver Algorithm
in the
COMSOL Multiphysics Reference Manual
for more information.
From the reduced-order model, use LiveLink™
for
Simulink
®
to retrieve the state-space matrices of the following system:
An alternative representation of the above dynamic system is:
The latter form is more suitable for large systems because the matrices
M
C
and
M
C
A
are usually sparse whereas
A
is dense.
