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-   -   Nyquist Diagram in Linear Control System (http://www.physicsforums.com/showthread.php?t=661214)

baby_1 Dec28-12 02:02 AM

Nyquist Diagram in Linear Control System
 
I have so much problem in draw nyquist diagram. here is some problem

1-as the book mentioned the open- transfer function doesn't have any pole and zero in right of S plane. and give me the uncompleted diagram
http://obrazki.elektroda.pl/2964561400_1356680763.jpg
so i completed it as you see , but my answer is different form the book !!!! what is my wrong?
http://obrazki.elektroda.pl/4218832200_1356680764.jpg


and other question:
2-here is uncompleted diagrams
http://obrazki.elektroda.pl/1262166500_1356681552.jpg
i completed and solved with this view
http://obrazki.elektroda.pl/6708074200_1356681553.jpg
but one of the answers is wrong .... now what is my problem?!!!!

how can i find the best videos references about nyquist in Linear Control System ?

Thanks


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