% Example 3.30
% Feb 7, 2020

close all; 
clear all;

s = tf( 's' )

%%%%
u =  -1;

sysG = u*30*(s-6)/( s^3 + 4*s^2 + 13*s );

t = 0:0.01:6;
%t = 0:0.01:4;
y = impulse( sysG, t );

plot( t, y, 'LineWidth',2 )
grid
hold on;

