example6_22.m

<MATLAB 7辅助控制系统设计与仿真>书籍内的源代码.

num=0.692;
den=[1,-1.758,0.375];
[z,p,k]=tf2zp(num,den);
p
figure(1)
dnyquist(num,den,0.1)
title('离散Nyquist 曲线图');
xlabel('实数轴');
ylabel('虚数轴');
figure(2)
[num1,den1]=cloop(num,den);
dimpulse(num1,den1);
title('离散冲激响应');
xlabel('时间');
ylabel('振幅');