I am attempting to use the Constrained Non-Linear Optimization VI to solve a simulation problem. Basically, I have an array of heating units, each with their own efficiency curve. Using that curve, and the energy cost, I am trying to determine what rate to run each unit at to match the heating load, while minimizing the cost to provide that heat.
I have attached the VI in question. The VI seems to function most times, howeve in this case, with a load of 1250000 BTU/Hr, I get an error, stating that the input matrix is singular. While doing some reading on these boards, it seems like the matrix might be singular because in this case there are two identical units in the system, and the efficiencies don't vary that much, but that doesn't explain why the VI will find a solution if you change the load by 50 BTU/Hr. Does anyone have experience with this solver? Or with this type of problem... Perhaps I am using an overly complicated method to get my answer.
"Determine Units to Run" is the main vi, the rest of required subvis.
