Import Timeseries on Simulink as raw structure and not as single data samples at certain simulation time

Hello, I am working on a Model Predictive Control on Simulink requiring a reference signal that is something like

where P is the prediction horizon ( the reference changes during the prediction horizon).

Without getting into too many unnecessary details, I created a timetable of reference values, and since the system is MIMO and Simulink accepts only timetables with one variable, i converted it to a timeseries to have a single structure with all the output references. I know it seems not smart, but I found working with timetables be easier for me and my kind of problem, thus I have a timeseries tms with

On Simulink, I wanted to connect after a From Workspace Block a Matlab Function Block (MFB) that simply does dinamically with t the current simulation time, thus giving to the MPC Block the correct changing reference.The command that does this in the MFB is getsampleusingtime(y_ref, t, t+(P-1)*time_sample_of_tms);

The problem is: Simulink gives to the MFB only the row of tms that is referred to the current time and not the whole timeseries every instant of the simulation, so i cannot apply my approach. I also tried the Constant Block, but returns errors.

Do you have any solution or wiser approach to solve this situation,

Thank you in advance,

GM.

[Suvansh Arora]

In order to understand this better, can you provide the following information:

1. MATLAB script, MAT file, Simulink Model to reproduce the issue at my end.

Answer 1

[Emmanouil Tzorakoleftherakis]

It seems to me that you want to implement the MPC preview capability in Simulink. This example actually has a custom previewer block that implements exactly what you need.

Hope that helps