function jy3<BR>disp('这是二阶无时延系统阶跃响应曲线K、T1、T2确定对象的传递函数');<BR>disp('选取两个时间点t1、t2,且t1<t2!');<BR>t1=input('t1=');<BR>y1=input('y(t1)=');<BR>t2=input('t2=');<BR>y2=input('y(t2)=');<BR>K=input('y(∞)=');<BR>[T1,T2]=solve('T1/(T1-T2)*exp(-t1/T1)-T2/(T1-T2)*exp(-t2/T2)=0.6','T1/(T1-T2)*exp(-t2/T1)-T2/(T1-T2)*exp(-t2/T2)=0.2','T1,T2');<BR>G=tf([K],conv([T1,1],[T2,1]))<BR>end