Specifications

lsim
16-126
linear interpolation). By default, lsim selects the interpolation method
automatically based on the smoothness of the signal U.
Finally,
lsim(sys1,sys2,...,sysN,u,t)
simulatestheresponsesofseveral LTImodelstothesame inputhistoryt,u and
plots these responses on a single figure. As with
bode or plot, you can specify
a particular color, linestyle, and/or marker for each system, for example,
lsim(sys1,'y:',sys2,'g--',u,t,x0)
The multisystem behavior is similar to that of bode or step.
When invoked with left-hand arguments,
[y,t] = lsim(sys,u,t)
[y,t,x] = lsim(sys,u,t) % for state-space models only
[y,t,x] = lsim(sys,u,t,x0) % with initial state
return the output response y, the time vector t used for simulation, and the
state trajectories
x (for state-space models only). No plot is drawn on the
screen. The matrix
y hasasmanyrowsastimesamples(length(t))andas
many columnsassystemoutputs. Thesameholdsfor
x with “outputs” replaced
bystates. Notethattheoutput
t maydifferfromthe specifiedtimevectorwhen
the input data is undersampled (see “Algorithm”).
Example Simulate and plot the response of the system
to a square wave with period of four seconds. First generate the square wave
with
gensig. Sample every 0.1 second during 10 seconds:
[u,t] = gensig('square',4,10,0.1);
Then simulate with lsim.
Hs
()
2s
2
5s 1++
s
2
2s 3++
-------------------------------
s 1–
s
2
s 5++
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