The characteristic equation of a feedback control system is given bys3+5s2+(K+6)s+K=0. In the root loci diagram, the asymptotes of the root loci for large K meet at a point in the s plane whose coordinates are:
The root locus diagram has loop transfer function G(s)H(s) = K/ s(s+4)(s2+4s+5) has
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For asymptotes passing from breakaway point then this point is also centroid
Transportation lag is seen in systems:
Mediums responsible for transportation lag are:
Linear lumped parameter models are not valid under situations as:
Practically all the systems have transportation lag :
The polar plot of a transfer function passes through the critical point (-1,0).Gain margin is
Consider the following statements:
1. The effect of feedback is to reduce the system error
2. Feedback increases the gain of the system in one frequency range but decreases in another.
3. Feedback can cause a system that is originally stable to become unstable
Which of these statements are correct.