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Unformatted text preview: ΞΆ = 0 . 5. We can see that the two root loci from the imaginary axis poles will not touch these dashed lines. Thus no K will cause all roots to have a damping ratio greater than 0 . 5 (c) When K is about 35 , 90, we can have some closed-loop poles with ΞΆ = 0 . 707. You can use Matlab to ο¬nd these values for K . (d) K = 35 is used for this following plot. The step response shows the basic form of a well damped response with the vibration of the response element added. 2 4 6 8 10 12 14 0.2 0.4 0.6 0.8 1 1.2 1.4 Step Response Time (sec) Amplitude Figure 4: Root locus for 5.13(d) 3...
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- Spring '07
- Root Locus, imaginary axis