Relative Stability

[@jmounikareddy3558]

Mistake at 30:40 it is phase cross over frequency

[@029sumit_kumar_phogat8]

Yup it is phase cross over freq

[@vrishabh5112]

how did the equation come at 36:18

[@dhananjaykumar5114]

Very Good Lecture

[@AbhishekKumar-ds1km]

@41:56..is the gain margin 1/2?? what is the answer plz??

[@harshitgupta476]

no, gain margin is defined only for open loop stable systems

[@sivakishorereddyseelam747]

in the second example for nyquist plot i mean type 2 third order system, the plot encircles the -1 point in clockwise direction so N=0 i.e system is stable . Can anyone tell me is it correct or not?

[@deepkalariya6906]

In second example of Nyquist plot we have encirclement is 2 right And that pole is also 2 because of s^2 so that p1=0 and p2=0. So why became we P=0 consider and system is unstable?????? Any one have answers please tell me.

[@gambhirkathait7606]

no encirclement of -1 and system is unstable??????????????

[@anantmishra4893]

I also have the same doubt..this teacher has done so many mistakes

[@abhishekshankar1136]

no. of encirclement should always be equal to P-Z... Z is equal =0 P=1 ( 1 open loop pole to the right half of s plane) 0!=1 therefore unstable

[@lonejahangir8660]

bbc washington