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Unformatted text preview: G s G s G s + = = + + + + + . The closed–loop characteristic polynomial is 3 2 2 s s s K + + + . Stability The Routh table is 3 2 1 1 2 1 2 s s K s K s K-. There is a sign change in the first column for K > 2 and K < 0; therefore, the closed–loop system is stable if 0 < K < 2. When K = 2, the s 1 row becomes a row of zeros. The even polynomial is in the s 2 row and is 2 2 s + = . Solving for s , the frequency of oscillation is 1.414 rad/s. 2...
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- Spring '11
- routh table, closed–loop characteristic polynomial