How to access GriddedLPVSS data at different scheduling parameters?

I have built a 2*2 GriddedLPVSS model in Matlab using the following:

s = struct( ...

'Pgrid', [150, 150, 150, -150, -150, -150], ...

'Qgrid', [75, 0, -75, 75, 0, -75] );

SSArray.SamplingGrid = s;

sys = ssInterpolant(SSArray)

SSArray is a 4-D ss model. I want to access the state space model at a certain combination of scheduling parameters like (Pgrid:25,Qgrid:35) for example. How can I do that? I have attached the SSArray.mat.

Answer 1

[Andrew Ouellette]

Hi Ali,

You can sample your LPV systems using psample.

SSArray = rss(36,2,2,6); % random 2x2x6 ss array
s = struct( ...
    'Pgrid', [150, 150, 150, -150, -150, -150], ...
    'Qgrid', [75, 0, -75, 75, 0, -75] );
SSArray.SamplingGrid = s;
sys = ssInterpolant(SSArray); % LPV system
psys = psample(sys,[],25,35); % sys sampled at (Pgrid:25,Qgrid:35)

To verify, you can check the sampling grid parameter of the returned system.

psys.SamplingGrid

ans = struct with fields:
    Pgrid: 25
    Qgrid: 35
     Time: 0