k step ahead simulation in simulink subsystems

Hi, I am wondering if I can simulate whithin a Simulink model a subsystem with a predefined simulation time. I want to implement a predictor in a subsystem that runs k steps ahead and gives its state at each time step of the root Simulink model.

Regards, Sergio

Answer 1

[Fangjun Jiang]

You can put the rest of the model into an Enabled Subsystem or Triggered Subsystem block. Let the simulation run but only enable or trig the subsystem after k steps.

Answer 2

[Guy Rouleau]

If your model is linear or close to, you might be interested in the Model Predictive Control Toolbox:

http://www.mathworks.com/products/mpc

Answer 3

[Sergio]

@Guy. It´s a MPC strategy but the model is nonlinear and implemented in Simulnk. At each step (root) I need a prediction of k steps ahead (subsystem). @Fangjun. I want the model runs at each step, not triggered at a certain k. I will take then the output of the subsystem at each k, but it has simulated for a longer time. To be clear, at each step I will put in the model the initial conditions...

Suggestions?

[Fangjun Jiang]

It sounds like you have to split them into two models and write a script to automate it. Something like:

for j=1:100;

sim('MPC_model',...);

% read result data from MPC_model simulation

% set initial condition for root model using data from MPC_model simulation

sim('Root_model');

end