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1、functionf,n=sconv(f1,f2,n1,n2,p) f=conv(f1,f2);f=f*p; n3=n1(1)+n2(1); L=length(n1)+length(n2)-1; n=n3:p:(n3+(L-1)*p);p=0.01; n1=-1:p:1; f1=ones(1,length(n1); n2=0:p:1;f2=2*n2; f,n=sconv(f1,f2,n1,n2,p); subplot(3,1,1),plot(n1,f1),axis(-1.5,1.5,0,2),grid on subplot(3,1,2),plot(n2,f2),axis(-0.1,1.2,0,3
2、),grid on subplot(3,1,3),plot(n,f),axis(-1.5,5,0,2),grid on x=1,2,3,4;y=1,1,1,1; z=conv(x,y)z =1 3 6 10 9 7 4 N=length(z); stem(0:N-1,z) sys=tf(0 0 1,1 2 100); t=0:0.01:5; f=10*sin(2*pi*t); y=lsim(sys,f,t); plot(t,y) sys=tf(0 0 1,1 2 100); t=0:0.01:5; y=impulse(sys,t); plot(t,y) title(连续冲击响应) xlabel
3、(time(sec) ylabel(y(t) sys=tf(0 0 1,1 2 100); t=0:0.01:5; y=step(sys,t); plot(t,y) title(阶跃冲击响应) xlabel(time(sec) ylabel(y(t) k=0:10;a=1 3 2;b=1 0 0; h=impz(b,a,k); stem(k,h) title(单位冲击响应) sys=tf(0 0 1,1 5 -1); t=0:0.01:5; f=2*cos(pi*t); y=lsim(sys,f,t); plot(t,y)sys=tf(0 0 1,1 sqrt(2) 1); t=0:0.01:
4、10; y=impulse(sys,t);subplot(3,1,1); plot(t,y) title(连续冲击响应) xlabel(time(sec) ylabel(y(t)sys=tf(0 0 1,1 sqrt(2) 1); t=0:0.01:10; y=step(sys,t); subplot(3,1,2); plot(t,y) title(阶跃冲击响应) xlabel(time(sec) ylabel(y(t)sys=tf(0 1 1,1 1 1); t=0:0.01:10; y=impulse(sys,t); subplot(3,1,1); plot(t,y) title(连续冲击响应) xlabel(time(sec) ylabel(y(t)sys=tf(0 1 1,1 1 1); t=0:0.01:10;y=step(sys,t); subplot(3,1,2); plot(t,y) title(阶跃冲击响应) xlabel(time(sec) ylabel(y(t)
