matlab单位阶跃响应与单位脉冲响应

1.   单位脉冲响应

num =[0 0 25];

den =[1 4 25];

impulse(num,den);   %dianwei maichong jili 

grid on;         %xianshi gezi(shange)

title('danwei maichong xiangying G(s)=25/(s^2+4s+25)');%biaoti

2.单位阶跃响应

num =[0 0 25];

den =[1 4 25];

step(num,den);   %dianwei jieyue jili 

grid on;         %xianshi gezi(shange)

title('danwei jieyue xiangying G(s)=25/(s^2+4s+25)');%biaoti