How to store structs and cell arrays of matrices in an S-function's Dwork memory.

1 vue (au cours des 30 derniers jours)
Bill Tubbs
Bill Tubbs le 29 Jan 2022
Modifié(e) : Bill Tubbs le 29 Jan 2022
I implemented a sophisticated multi-model process observer in MATLAB code using struct objects for convenience. Each struct has fields for all the parameters and variables needed by the observer, including matrices, cell-arrays of matrices, and cell arrays of stuct instances representing individual Kalman filters.
Now I'm looking into whether this matlab code could be used directly in an S-function. Now I realise that structs and cell arrays are not possible data types for Dwork vectors. Would I have to extract and copy all the dynamic (i.e. time-varying) elements from these cells and structs into Dwork vectors every iteration (and then re-copy them all back into the new struct objects at the start of the next iteration)?
Or is there an easier way to implement this code in Simulink?
Example of a simulation of the observer in MATLAB:
% Simulate observer
Xk_est = nan(nT+1,n);
Yk_est = nan(nT+1,ny);
obs = MKF1;
for i = 1:nT
uk = U(i,:)';
yk = Ym(i,:)';
obs = update_MKF(obs, uk, yk);
Xk_est(i+1,:) = obs.xkp1_est';
Yk_est(i+1,:) = obs.ykp1_est';
end
MKF1 = obs;
To get a sense of the challenge here, each obs instance has about 15 dynamic real arrays (no problem) but also has a cell array of n_filt dynamic integer arrays, and a cell array of structs containing 4 dynmamic arrays, where n_filt is the number of 'sub-filters' which could be anywhere from 2 to up to 50 (although the number is not time-varying).
Maybe this kind of observer is too complicated to consider implementing in Simulink. Or perhaps I need to re-write the existing code without the structs and cell array data structure to implement in an S-function.
Any advice appreciated.
The observer code is here if you are interested.

Réponses (0)

Catégories

En savoir plus sur Simulink Environment Customization dans Help Center et File Exchange

Produits


Version

R2019b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by