input_g2.m

控制系统仿真中的根轨迹MATLAB仿真源码

%输入开环传递函数传函

gswin=figure('position',[100 150 600 400],...
           'name','输入前向通道参数','menubar','none',...
           'NumberTitle','off','Resize','off');

dd=text(0.25,0.9,'前向通道参数');
set(dd,'fontsize',15,'color',[0,0,1],'fontname','宋体');

%分子输入框
dd=text(0,0.7,'请输入分子:');
set(dd,'fontsize',15,'color',[0,0,1],'fontname','宋体');
numedit=uicontrol(gswin,'style','edit','units','normalized','position',[0.2 0.45 0.4 0.1],...
        'string','[-1 3]','fontsize',15,'back',[1 1 1]);

%分母输入框
dd=text(0,0.3,'请输入分母:');
set(dd,'fontsize',15,'color',[0,0,1],'fontname','宋体');
denedit=uicontrol(gswin,'style','edit','units','normalized','position',[0.2 0.15 0.4 0.1],...
        'string','[1 3 0]','fontsize',15,'back',[1 1 1]);

%接受线性环节传函，其中：num为分子；den为分母
getgs=['num1=eval(get(numedit,''string''));',...
       'den1=eval(get(denedit,''string''));',...
       'close(gswin);'];    
uicontrol(gswin,'style','push','units','normalized','position',[0.75 0.15 0.15 0.15],...
        'string','确定','fontsize',15,'call',getgs);

%画边框
hold on;
x=[-0.05 0.7 0.7 -0.05 -0.05];
y=[0.8 0.8 0 0 0.8];
plot(x,y,'r');

axis([-0.05 1 0 1]);
axis off;