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Unformatted text preview: 21e. Pole at +6, zero at +6 cancel. Other poles are on LHP. Asymptotically unstable, BIBO stable. 23. T(s) = + (  ) + + (  ) ks 4s s 2 1 ks 4s s 2 = ( + ) + + k s 4 s2 k 2s 4k For k=1, K=2 and k=20 find the roots of the denaminator: K=1 eq.  + = s2 s 4 0 real part is positive RHP unstable K=2 eq. + = s2 4 0 roots on imaginary axis marginally stable K=20 eq. + + = s2 18s 4 0 roots on LHP stable. 24b. 26b. 26c....
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 Spring '10
 Mo

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