MATLAB CONTROL SYSTEM TOOLBOX 9 Guia do Utilizador descarregar pdf (Página 520)

lsim

11-130

To illustrate why resampling is sometimes necessary, consider the

second-order model

Tosimulateits responsetoasquarewavewithperiod1 second,youcanproceed

as follows:

w2 = 62.83^2

h = tf(w2,[1 2 w2]);

t = 0:0.1:5; % vector of time samples

u = (rem(t,1)>=0.5); % square wave values

lsim(h,u,t)

Hs()

ω

2

s

2

2s ω

2

++

-------------------------------

,= ω 62.83=

1 2 ... 515 516 517 518 519 520 521 522 523 524 525 ... 648 649

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