pll.rar_PLL_相平面

function [tt,v1,fo,fs,t1,vc,th1,fn,c,vo]=pll(fii,foo,Kd,T,th0,dt); % % [t1,vc,th1,fn,c,vo]=pll(fi,fo,Kd,T,th0,dt); % Default:pll(800,1000,1,.1,[0 0],.00025);BBI 99 global K fi fo if nargin<5;th0=[0 0];end ; if nargin<2;foo=1000;end; if nargin<1;fii=800;end; if nargin<3;Kd=1;end; if nargin<4;T=100/foo;end; if nargin<6;dt=.25/foo;end; fo=foo;fi=fii;Kv=2*pi*fo;K=Kv*Kd; vs=version;vs=vs(1); if strcmp (vs,'4'); [t,th]=ode23('equation',0,T,th0);whitebg('w');delete(1); else dT=.25/fi;[t,th]=ode45('equation',0:dT:T,th0'); end; t1=0:dt:T-dt; th1=spline(t,th(:,1),t1);th2=spline(t,th(:,2),t1); vo=cos(2*pi*fo*t1+th1); fn=1/T;n=length(vo);c=abs(fft(vo))/n*2; I=1:n/2;fn=fn*(I-1);c=c(I); I=find(c>.01);fn=fn(I);cn=20*log10(c(I)); vc=th2/Kv;f=th2/(2*pi)+fo; %================================================================================ nstr=['Phase-Locked Loop(PLL)fo='num2str(fo)'(kHz),Kv=']; nstr=[nstr num2str(Kv)'x 1e03(rad/V-s),Kd='num2str(Kd)']; nstr=[nstr 'BBI 99']; figure('Units','normal','Pos',[0.006 .05 .985 .88]); set(gcf,'NumberTitle','off','Name',nstr); subplot(221);plot(t1,vc,'b');title('Control Voltage'); xlabel('t(ms)');v=axis;v3=v(3)*1.17;zoom xon; if abs(v3)<1e-06;v3=-0.084;end; if abs(min(vc)+max(vc))<1e-04;v3=-1.337;end; subplot(223);plot(t1,f,'k'); title('Frequency');xlabel('t(ms)'); subplot(224);plot(t1,th1,'k'); title('Phase');xlabel('t(ms)'); m=length(I); for i=1:m; subplot(222); plot(fn(i)+[0 0],[-40 cn(i)],'b');hold on; end; plot(fn(m)+2/T,0,'b',fn(1)-2/T,0,'b'); title('Spectrum');hold off;xlabel('f(kHz)');pause(3); %============================================================================== m=10*4;n=length(t1);n2=n-m+1; dt=t1(2);T=m*dt;dt=.1*dt;fs=1/dt; tt=0:dt:T;tt2=t1(n2)+tt; v1=spline(t1(1:m),vc(1:m),tt); v2=spline(t1(n2:n),vc(n2:n),tt2); y1=vco(v1,fo,fs);y2=vco(v2,fo,fs); nstr=['SCOPE blue:vo(t)red:vi(t)fi=']; nstr=[nstr num2str(fi)'(kHz),fo='num2str(fo)'(kHz),']; H2=figure('Name',nstr,'Num','off','Pos',[5 100 790 400]); subplot(211);plot(tt,y1,'b',tt,sin(2*pi*fi*tt),'r'); set(gca,'units','pix','pos',[40 240 720 140]);xlabel('t(ms)'); subplot(212);plot(tt2,sin(2*pi*fi*tt2),'r',tt2,h2,'b'); set(gca,'units','pix','pos',[40 45 720 140]); axis([tt2(1) tt2(length(tt2)) -1 1]); xlabel('t(ms)');v=axis;zoom xon;