dcgainmr
(Not recommended) Reduced order model
dcgainmr
is not recommended. Use
reducespec
instead. (since R2023b) For more information, see Version History.
Syntax
[sysr,syse,gain] = dcgainmr(sys,ord)
Description
[sysr,syse,gain] = dcgainmr(sys,ord)
returns a reduced order model
of a continuous-time LTI system SYS by truncating modes with least DC gain.
Specify your LTI continuous-time system in sys. The order is specified in
ord
.
This function returns:
sysr
—The reduced order models (a multidimensional array ifsys
is an LTI array)syse
—The difference betweensys
andsysr
(syse=sys-sysr
)gain
—The g-factors (dc-gains)
The DC gain of a complex mode
(1/(s+p))*c*b'
is defined as
norm(b)*norm(c)/abs(p)