Simulink Control Design™ - MathWorks

io(1)=linio('watertank/PID Controller',1,'input');

io(2)=linio('watertank/Water-Tank System',1,'openoutput');

watertank_spec = operspec(model);

opOpts = findopOptions('DisplayReport','off');

op = findop(model,watertank_spec,opOpts);

sys = linearize(model,op,io);

Create the chirp signal.

input = frest.Chirp(sys);

frest.Chirp chooses a frequency range based on the system dynamics. It also

automatically initializes other parameters of the chirp signal.

input

The chirp input signal:

FreqRange : [0.001581138830107 0.1581138830107] (rad/s)

Amplitude : 1e-05

Ts : 7.94767061252222 (sec)

NumSamples : 1000

InitialPhase : 270 (deg)

FreqUnits (rad/s or Hz): rad/s

SweepMethod(linear/ : linear

quadratic/

logarithmic)

You can change properties of the signal using dot notation. For instance, increase the

signal amplitude.

input.Amplitude = 3e-5

The chirp input signal:

FreqRange : [0.001581138830107 0.1581138830107] (rad/s)

Amplitude : 3e-05

Ts : 7.94767061252222 (sec)

NumSamples : 1000

InitialPhase : 270 (deg)

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