in this lecture we finish off chapter 3 and plunge
right into the middle of chapter 4...
automobile cruise control
We can use Maple to see how constant feedback suffices in
automatic cruise control:
spectral analysis using FFT
The Fast Fourier Transform (FFT) transform a signal
from the time domain into the frequency domain.
Via the FFT we are able to capture the essential
information of a signal.
From the output of the FFT we can filter out signals
at unwanted frequencies or remove noise from the signal.
See the Maple worksheet below for a simulation of this
type of filtering:
The MATLAB code for the spectral analysis shown in the book
may be downloaded here: