MATLAB文档 1.doc

实习一 1 2 3 4 5 6 7 8 书P55 t=0:0.1:7*pi;y=1-exp(-0.2*t).*cos(0.9*t);plot(t,y); title(\fontsize{14}\bf\it 203130705 y=1-exp(-\alpha*t).*cos(\omega*t)); xlabel(\fontsize{14}\bft\rightarrow); ylabel(\fontsize{14}\bfy\rightarrow); text(3.25,1.51,\fontsize{14}\leftarrow\itsin(t)\fontname{隶书}极大值\it) text(19.2,1,\fontsize{14}\leftarrow\itsin(t)\fontname{隶书}极小值\it) 实习二 1 2 Cos(t)sin(t) a=1;thita=0:0.1:2*pi; rho=a.*cos(thita).*sin(thita); polar(thita,rho);hold on R=0.01e0.1 a=2;thita=0:0.1:4*pi; rho=a.*0.01*exp(0.1*thita); polar(thita,rho);hold on; 3 t=0:0.1:2*pi;y=sin(t);plot(t,y); axis([0,2*pi,-1.2,1.2]); title(\fontsize{14}\bf\it y=sin(t) y=cos(t)); text(pi,0,’\fontsize{14}\leftarrow\it sin(t)’) text(2*pi,-0.2,’\fontsize{14}\uparrow\it2\pi’) text(pi/2,1,’\fontsize{14}\leftarrow\itsin(t)\fontname{隶书}极大值\it’) text(3*pi/2,-1,’\fontsize{14}\leftarrow\itsin(t)\fontname{隶书}极小值\it’);hold on; t=0:0.1:2*pi;y=cos(t);plot(t,y);hold on; text(pi/2,0,’\fontsize{14}\leftarrow\it cos(t)’) text(0,1,’\fontsize{14}\leftarrow\itsin(t)\fontname{隶书}极大值\it’) text(pi,-1,’\fontsize{14}\leftarrow\itsin(t)\fontname{隶书}极小值\it’);hold on; t=0:0.1:2*pi; x=0:0.1:2*pi; y1=sin(t);y2=cos(x); plot(t,y1,g,x,y2,b); axis([0,2*pi,-1.2,1.2]); title(\fontsize{14}\bf\it y=sin(t) y=cos(t)); %text(pi,0,\fontsize{14}\leftarrow\it sin(t)); text(2*pi,-0.2,\fontsize{14}\uparrow\it2\pi); text(pi/2,1,\fontsize{14}\leftarrow\itsin(t)\fontname{隶书}极大值\it); text(3*pi/2,-1,\fontsize{14}\leftarrow\itsin(t)\fontname{隶书}极小值\it); %text(pi/2,0,\fontsize{14}\leftarrow\it cos(t)); text(0,1,\fontsize{14}\leftarrow\itcos(x)\fontname{隶书}极大值\it); text(pi,-1,\fontsize{14}\leftarrow\itcos(x)\fontname{隶书}极小值\it); legend(sin,cos); 实习三 1 实习四 1 num=[0.0001,0.218,1.0436,9.3599]; den=[0.0006,0.0268,0.06365,6.2711]; sys=tf(num,den) Transfer function: 0.0001 s^3 + 0.218 s^2 + 1.044 s + 9.36 ------------------------------------------- 0.0006 s^3 + 0.0268 s^2 + 0.06365 s + 6.271 sys1=ss(sys) a = x1 x2 x3 x1