polar plot in control system

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Steps
step 1- convert G(s) to G(jw)
step 2- find magnitude
step 3- find angle
step 4- find corner frequency
step 5- draw a table with W(frequency), magnitude and angle
step 6- convert that table with polar co-ordinate into rectangular co-ordinate form
step 7- choose the scale for graph
step 8- plot the points
step9- find gain margin- polar plot touches -180 degree line, the inverse of the distance from origin to that point is gain margin
step 10- find phase margin- polar plot touches unity circle at a point ,take the angle up-to that point and add it to 180 degree to get phase margin

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00:16 find G(jw)
00:55 find magnitude
01:45 find angle
02:52 find corner frequency
03:36 draw a table with frequency, magnitude & angle
06:06 convert polar to rectangular co-ordinates
08:06 choose scale for graph
11:00 find gain margin
12:45 find phase margin

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