k step ahead simulation in simulink subsystems

2011 8 18
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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

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回答（3 个）

Fangjun Jiang
Fangjun Jiang 2011-8-18

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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.
Guy Rouleau
Guy Rouleau 2011-8-18

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If your model is linear or close to, you might be interested in the Model Predictive Control Toolbox:
http://www.mathworks.com/products/mpc
Sergio
Sergio 2011-8-19

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@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...
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Fangjun Jiang
Fangjun Jiang 2011-8-19
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

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Sergio
Sergio
2011-8-18

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