Hi dear all
I want to use an MPC controller for a two-tank system. The tanks are connected with two pipes in different heights. The tank1 is filled with a continuous pump and an output pipe is connected to the tank2. Stability, constant continuous output and predefined height of liquid in tanks are aims of control.
the MPC function block is written with YALMIP language with Mosek solver.
I use feedback of heights (h1, h2) to the MPC function Input (fig.1) and two errors “Invalid setting for output port dimensions of 'p17__2/Mux1'. The dimensions are being set to 1. This is not valid because the total number of input and output elements are not the same” and “Error in port widths or dimensions. Input port 1 of 'p17__2/MPC1' is a one dimensional vector with 1 elements” are showed. But when I use a signal source instead of h1, h2 no error is occurred (fig.2).
Can you anyone advise me about my mistake?
Thanks a lot.
Dear Mohamad Bita
In addition to what Harald Kirchsteiger said, since you have a dimension error, I advise you to check if the "Output dimensions" of your Interpreted Matlab function is set correctly. You can change it by double-clicking on the Interpreted Matlab function block. It should have the same size as your MPC output.
Regards,
Mahdi
Dear Mohamad Bita , sometimes in simulink, it starts from a point that dimensions are not recognized and this make an error like yours.
- Just predefine output of your blocks by using zero matrices (at the start of the block script - for example h1 = zeros(m,n) )
This link maybe Useful:
https://www.mathworks.com/help/simulink/slref/sim.html
Thanks all
I found that the error was from state machin block which is event based.
I removed event and it worked.
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