td = 2;
tk = 1;
zs = 1;
sys = tf(zs, [tk 1], 'InputDelay', td);
[y,t] = step(sys, 10);
plot(t, y,'k-')
hold on
plot([td td],[0,1.05],'k:',[td td+tk],[0,1.05],'k:',[0 10],[zs,zs],'k:')
hold off
xlabel('t');
ylabel('y / Z_s');
axis([0 10 -0.1 1.1])
text(1,0.05, 'T_d');
text(td+.4,1.05, 'T_s');
set(1, 'PaperUnits', 'centimeters')
set(1, 'PaperPosition', [3 10 11 9])
print -deps 'obr417.eps'

