ex2_14.m

反馈控制系统设计与分析（matlab程序）

Z=[-3; -7]; P=[0; -1.8+1.63j; -1.8-1.63j; -1; -1];
K=6.8; G=zpk(Z,P,K); G1=tf(G); 
%up to now repeat the earlier example, then get the zpk model
G2=zpk(G1)