Hi, I'm trying to program a Simscape Component Block. It's an adaptation of a PS Lookup Table (2D).
I would like to change the defaults for entering the parameters. My adaptation shall include, that the parameters x1 and x2 don't have to be the same length and that the parameter x2 may be an array from which a row is selected depending on the input I1.
relationship between parameter x1 und x2:
x1(1) belongs to x2(1,:)
x1(2) belongs to x2(2,:) etc.
I tried to use a logical/relational command, but an error occurs. I get the error: Error compiling Simscape network. Caused by: "Invalid use of a logical value to index a value with unit." allIdx(x1 == I1) = [1 2 3], x1 = {[4 5 6], 'bar'}, I1 = {[1x1 double],'Pa'}
Does anyone know how I can solve this problem/error or has a different approach for the code?
Here is a minimal expample of my code:
component example
inputs
I1;
I2;
end
outputs
O;
end
parameters
x1 = [4 5 6];
x2 = [0 9 48 61 84; 0 21 39 67 86; 0 20 46 60 85];
v = [0 1 2; 1 2 3; 2 3 4; 3 4 5; 4 5 6];
interp_method = simscape.enum.interpolation.linear;
extrap_method = simscape.enum.extrapolation.linear;
end
parameters (Access=private)
x1_interp = [min(x1):(max(x1)-min(x1))/9:max(x1)];
end
intermediates (Access=private)
allIdx = 1:numel(x1);
idx = allIdx(x1==I1);
x2_neu = x2(idx,:);
x2_interp = [min(x2_neu):(max(x2_neu)-min(x2_neu))/9:max(x2_neu)];
v_interp = interp2(x1,x2_neu',v,x1_interp,x2_interp');
end
equations
O == tablelookup(x1_interp, x2_interp, v_interp, I1, I2, interpolation=interp_method, extrapolation=extrap_method);
end
end
