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exp4_23.m in Matlabsimulationofco

			
% 系统开环传递函数为G(s)=k/s(s+1)(s+2)
% 试寻找一个合适的k值使得闭环系统具有较理想的阶跃响应。
% 开环系统描述
clc
clear
close all
num=1;
den=conv([1 0],conv([1 1],[1 2]));
z=[0.1:0.2:1];
wn=[1:6];
sgrid(z,wn);
text(-0.3,2.4,'z=0.1')
text(-0.8,2.4,'z=0.3')
text(-1.2,2.1,'z=0.5')
text(-1.8,1.8,'z=0.7')
text(-2.2,0.9,'z=0.9')

% 通过sgrid指令可以			

			...
			...
			... to be continued.

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