fig19.m

realize analysis and design for computer-controlled system

% Generates Fig 1.9 
% Computer Controlled Systems (3rd ed)
% Author: B. Wittenmark
% Last edit: 1997-06-21
% Copyright (c) 1996 by K. J. 舠tr鰉, B. Wittenmark and
% Department of Automatic Control, Lund Institute of
% Technology, Lund, Sweden

block19;

newplot;
set(gcf,'PaperUnits','centimeters','PaperPosition',[2 2 13 10])
set(gcf,'Units','centimeters','position',get(gcf,'PaperPosition'))

uc=1;
lw=0.9;
h=1.4;
w=1;
a=w/2;
b=2*w;
K=2*w*w;
%s0=2.5/(h*h);
%s1=-1.5/(h*h);
%r1=0.75;
%t0=1/(h*h);
%t1=0;
%
opt=simset('Refine',5);
[t,x,y]=sim('block19',[0, 10],opt);
subplot(3,1,1);
plot(t,y(:,1),'k-',t,y(:,4),'k--',t,y(:,7),'k:','Linew',lw);
axis([0,10,0,1.3]);
set(gca,'Fontsize',9,'Fontname','NewCenturySchlbk');
set(gca,'xtick',[0 5 10]);
set(gca,'ytick',[0 1]);
ylabel('Position','Fontsize',9,'Fontname','NewCenturySchlbk');
%
subplot(3,1,2);
plot(t,y(:,2),'k-',t,y(:,5),'k--','Linew',lw);
axis([0,10,-0.2,0.8]);
set(gca,'Fontsize',9,'Fontname','NewCenturySchlbk');
set(gca,'xtick',[0 5 10]);
set(gca,'ytick',[0 0.5]);
ylabel('Velocity','Fontsize',9,'Fontname','NewCenturySchlbk');
%
subplot(3,1,3);
[ts,ys]=stairs(t,y(:,3));
plot(ts,ys,'m',t,y(:,6),'k--','Linew',lw);
axis([0,10,-0.6,0.6]);
set(gca,'Fontsize',9,'Fontname','NewCenturySchlbk');
set(gca,'xtick',[0 5 10]);
set(gca,'ytick',[-0.5 0 0.5]);
ylabel('Input','Fontsize',9,'Fontname','NewCenturySchlbk');
xlabel('Time (\omega_0\it{t})','Fontsize',9,'Fontname','NewCenturySchlbk');

%
%ylblalgn;