MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Guide de l'utilisateur télécharger pdf (Page 447)

100

101

A GUI to Set Simulink

Model Parameters (GUIDE)

If the value is in range, the slide r Value property is updated to the new

value.

• Sets the appropriate block parameter to the new value (

set_param).

Here is the callback for the Kf Current value text box:

function KfCurr entV alue_Callback(hObject, eventdata, handles)

% Ensure model is open.

model_open(handles)

% Get the new value for the Kf Gain.

NewStrVal = get(hObject, 'Strin g');

NewVal = str2double(NewStrVal);

% Check that the entered va lue falls within th e allowable range.

if isempty(NewVal) || (NewVal< -5 ) || (NewVal>0),

% Revert to last value, as indicated by Kf Valu eSlider.

OldVal = get(handles.KfValueSli der,'Value');

set(hObject, 'String',OldVal)

else % Use new Kf value

% Set the value of the KfValueSlider to th e new value.

set(handles.KfValueSlider,'Value',Ne wVal)

% Set the Gain parameter of the Kf Gain Bl ock

% to the new value.

set_param('f14/Controller/Gain','Gai n',NewStrVal)

end

The callback for the Ki Current value follows a similar appro ach.

Run the Simulation from the GUI

The GUI Simulate and store results button callback runs the model

simulation and stores the results in the

handles structure. Storing data

in the

handles structure simplifies the process of passing data to other

subfunction since this structure can be passed as an argument.

When a user clicks the Sim u late and store results button, the callback

executes the following steps:

• Calls

sim, which runs the simulation and returns the data that is used

for plotting.

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Guide de l'utilisateur Page 447

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