mdl = 'scdcascade';
open_system(mdl);
Create an slLinearizer interface for the model.
sllin = slLinearizer(mdl);
Vary the proportional (Kp2) and integral gain (Ki2) of the C2 controller in the 10% range.
Kp2_range = linspace(0.9Kp2,1.1Kp2,3);
Ki2_range = linspace(0.9Ki2,1.1Ki2,5);
[Kp2_grid,Ki2_grid] = ndgrid(Kp2_range,Ki2_range);
params(1).Name = 'Kp2';
params(1).Value = Kp2_grid;
params(2).Name = 'Ki2';
params(2).Value = Ki2_grid;
sllin.Parameters = params;
To calculate the loop transfer function for the inner loop, use the e2 signal as the analysis
point. To eliminate the effects of the outer loop, break the outer loop at y1m. Add these
points to sllin.
addPoint(sllin,{'e2','y1m'});
Determine the index for the maximum values of Ki2 and Kp2.
getLoopTransfer