How do I implement simulannealbnd function in simulink?

Hello,

I am trying to implement simulated annealing optimisation into my simulink model through the Matlab function block. Unfortunatey when I run the simulation I get the error 'Function 'simulannealbnd' not supported for code generation.'. I understand this is a limitation of the function and it cannot be directly implemented in simulink, however I was wondering if there were any workarounds or equivalent simulink functions that I can use. Here is a snippet of the code I am using:

function [c_batt, c_sc] = sa_optimisation(P_dem, Pmax_batt, Pmax_sc)

%Prerequisites
lb = [-1,-1];
ub = [1,1];
x0 = lb;
rng default

%Execute cost function
cost_function = @(x,y)powerCostFunction(P_dem, x, y, Pmax_batt, Pmax_sc);
loss = @(p)cost_function(p(1),p(2));
x = simulannealbnd(loss,x0,lb,ub);

c_batt = x(1);
c_sc = x(2);
end

Answer 1

[Abdolkarim Mohammadi]

You can declare the functions that are not compatible with code generation using coder.extrinsic() as extrinsic functions. Simply try this code as the very first command in your function:

coder.extrinsic ('simulannealbnd');

However, you should notice that extrinsic functions are executed in the MATLAB environment. Therefore, this adds an overhead to the overall execution time, but it is often negligible.

[Carlo Loregian]

Thanks for the quick reply.

I have tried that, however that creates another error stating: 'Function handles cannot be passed to extrinsic functions.'. Is there a way to call simulannealbnd without a function handle as an argument?

[Carlo Loregian]

Following this answer and this workaround for function handles, the simulation now runs.

@Abdolkarim Mohammadi-Balani Thanks for the help.