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Universidade Presbiteriana Mackenzie Automaç˜ao e Controle I

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Automação e <strong>Controle</strong> I – Aula 3T – Professor Marcio Eisencraft – julho 2006<br />

F<br />

F<br />

() s<br />

() s<br />

3 3<br />

− s −<br />

= 5 + 5<br />

2<br />

s s +<br />

3 1 3<br />

= −<br />

5 s 5<br />

6<br />

5<br />

3 ( s + 2)<br />

= −<br />

2<br />

2s<br />

+ 5 s 5 ( s + 1)<br />

+ 4<br />

( s + 1)<br />

3 2<br />

− 2<br />

2<br />

( s + 1)<br />

+ 4 10 ( s + 1)<br />

+ 4<br />

8<br />

3<br />

5<br />

⇒<br />

Utilizando-se então as linhas (2), (9a) e (9b) da Tabela 2.1 chega-se a:<br />

Exercícios<br />

f<br />

3<br />

3<br />

⎛<br />

−t<br />

() t = u()<br />

t − e ⎜cos<br />

2t<br />

+ sin 2t<br />

⎟<br />

5 5 ⎝ 2 ⎠<br />

−5t<br />

4. (NISE, 2002; p. 35) Obter a transformada de Laplace de f () t = te .<br />

5. (NISE, 2002; p. 36) Obter a transformada de Laplace inversa de:<br />

10<br />

F () s =<br />

.<br />

s<br />

1<br />

( )( ) 2<br />

s + 2 s + 3<br />

⎞<br />

.<br />

.

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