Graphical worstcase gain analysis
wcgainplot(sys)
wcgainplot(sys,w)
wcgainplot(sys,...,options)
wcgainplot(
plots
the nominal and worstcase gains of the uncertain system sys
)sys
as
a function of frequency. For multiinput, multioutput (MIMO) systems,
gain refers to the largest singular value of the frequency response
matrix. (See sigma
for more
information about singular values.) The plot includes:
Nominal — nominal gain of sys
Worst — the response falling within the uncertainty
of sys
that has the highest peak gain
Worstcase gain (lower bound) — the lowest worstcase gain at each frequency
Worstcase gain (upper bound) — the highest gain within the uncertainty at each frequency
Sampled Uncertainty — 20 responses randomly
sampled from sys
wcgainplot(
focuses
the plot on the frequencies specified by sys
,w
)w
.
If w
is a cell array {wmin,wmax}
, wcgainplot
plots
the worstcase gains in the range {wmin,wmax}
.
If w
is an array of frequencies, wcgainplot
plots
the worstcase gains at each frequency in the array.
wcgainplot(
uses
the options set sys
,...,options
)options
to specify additional
options for the computation of the worstcase gains. Use wcgainOptions
to create the options set.

Uncertain dynamic system. 

Frequencies of worstcase gain plots. Specify frequencies in
radians/


Options set specifying additional options for the computation
of the worstcase gains. Use 
sigma
 usample
 wcgain
 wcgainOptions