SIMULINK and GUIs - A Guide to MATLAB for Beginners and Experienced Users - page 126

Figure8-5: ScopeOutput.
For this, all we have to do is add another block to the model from the “Sources”
library. Click on the shaft of the arrow at the top of the model going into the
first Integrator and use Cut from the Edit menu to remove it. Then drag in
another “Sum” block before the first Integrator and input a suitable source to
one input port of the “Sum” block. For example, if g ( t ) is to represent “noise,”
drag the Band-Limited White Noise block from the “Sources” library into the
model and hook everything up as shown in Figure 8-6.
The output from this revised model (with the default values of 0.1 for the
noise power and 0.1 for the noise sample time) looks like Figure 8-7. The effect
of noise on the system is clearly visible from the simulation.
Figure8-6: ModelfortheInhomogeneousEquation.