DESIGN PROJECT 2 PID Controller For the following unity feedback system
G_(c)(s)
is a PID controller and
G(s)
is
G(s)=(1)/(s(s+1)(s+4))
. a) Draw root locus curve for
K_(p)
changes from zero to infinity when
K_(l)=0
and
K_(d)=0
. b) Obtain the
K_(p),K_(l)
, and
K_(d)
values of PID controller by using the
2^(nd )
Ziegler Nichols Method. c) Draw the modified root locus curve and step response. Do you have a good step response ? d) How could you improve the performance further? Show on root locus and step response curves.