Two sign changes in the first column two roots in rhp

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Unformatted text preview: array. Two sign changes in the first column Two roots in RHP 9 10 Example 2 Example 3 Routh array Routh array If 0 appears in the first column of a nonzero row in Routh array, replace it with a small positive number. In this case, Q has some roots in RHP. Two sign changes in the first column If zero row appears in Routh array, Q has roots either on the imaginary axis or in RHP. No sign changes in the first column Two roots in RHP Take derivative of an auxiliary polynomial auxiliary (which is a factor of Q(s)) Q(s)) 11 No roots in RHP But some roots are on imag. axis...
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