continuous SISO system limit feedback gain
g = krac2(sys)
constant
krac2(sys) computes the gains g such that the system sys feedback by g (sys/.g) has 2 real equal poles.
krac2(sys)
g
sys
sys/.g
h = syslin('c', 352*poly(-5,'s') / poly([0,0,2000,200,25,1],'s','c')); clf evans(h,100) g = krac2(h) hf1 = h/.g(1); roots(hf1.den) hf2 = h/.g(2); roots(hf2.den)
handling zpk representation