
FIGURE 6.29 Simulink
®
diagram for third-order and second-order control systems.
012345 012345
0
0.25
0.5
y (t)y (t)
x (t)x (t)
0.75
1
1.25
1.5
Response of third-order system
0
0.25
0.5
0.75
1
1.25
1.5
t (s)
0
0.25
0.5
0.75
1
1.25
1.5
0
0.25
0.5
0.75
1
1.25
1.5
t (s)
Response of third-order system
Response of second-order system Response of second-order system
FIGURE 6.30 Step response of stiff and nonstiff control system models.
512 Simulation of Dynamic Systems with MATLAB
®
and Simulink
®