clear all; 
close all;
t   = 0:0.0000001:0.00005;
s   = tf('s');

sys = (1.000000000*10^10)/(s^2 + 200000.*s + 1.000000000*10^10);
sys2 = 1/(6.3196375*10^(-13)*s^2 + 1.124*10^(-6)*s + 1);

y   = step(sys,t);
y2   = step(sys2,t);

%damp(sys);
%damp(sys2);

plot(t,y,'-r')
hold on
plot(t,y2,'-b')

xlabel('t');
ylabel('y(t)');
grid on;