#### promach

##### Advanced Member level 4

**As gain (GmRp) increases, closed loop poles move into right half S-plane**" ? http://lpsa.swarthmore.edu/Root_Locus/Example1/Example1.html does not have such right half plane route. Why can't the root locus travel along the

__vertical imaginary axis__?

2) From https://www.ee.usyd.edu.au/tutorials_online/matlab/rlocus/rlocus.html , why "

**The root locus of an**" ? Could anyone give further maths explanation on this statement ?

__(open-loop) transfer function__is a plot of the locations (locus) of all possible__closed loop poles__3) For https://en.wikipedia.org/wiki/Closed-loop_pole , why "

**For negative feedback systems, the closed-loop poles move along the root-locus**" ?

__from the open-loop poles to the open-loop zeroes__as the gain is increasedScreenshots extracted from http://inf-server.inf.uth.gr/courses/CE433/tutorials/VCO.pdf#page=11