pzmap(sys); %零极点 figure(2)
rlocus(sys); %根轨迹 figure(3) p=roots(den) t=0:0.01:10;
impulse(sys,t);grid; %脉冲 figure(4)
step(sys,t);grid; %阶跃 figure(5)
margin(sys) %伯德图
5.运用到的推导公式
?d??n1??2 2??arctan1???
tr?????d??d
tp?
???1??2Mp?e3??n?100%
ts1?
ts2?4??n
1Mr?2?1??2 2?4??4?224?r??n1?2?2?b??n1?2??2 ?c??n1?4??2?4
??arctan2?1?4??2?42