Is it possible to convert the whole Simulink model into a state space one?

Question

Dingyu Xue 2019-5-20

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https://ww2.mathworks.cn/matlabcentral/answers/463140-is-it-possible-to-convert-the-whole-simulink-model-into-a-state-space-one

回答： Jesús Zambrano 2020-2-7

Dear friends

In fact I am thinking of simulate a system, whose terminal information at t_k is known, and the information at t_0 is unknown. If I try to run Simulink model, it is prompted that since t_0 is smaller than the "initial time" t_k, simulation failed. So

(1) Is there a way to set the Simulink environment such that it can be simulated?

(2) If not, can I extract the state space model from the whole Simulink model such that ode45 or other solvers can be used to solve the problem?

Thanks

Dingyu

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Answer 1

Jesús Zambrano 2020-2-7

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Hi Dingyu,

You first have to create the input vector(s) to your model and collect the simulation results or output vector(s).

With this done, you can follow a standard procedure for state space identification, for example following the steps in this link https://www.mathworks.com/help/releases/R2019b/ident/ref/estimatestatespacemodel.html

Hope it can help with your question.

Best,

Jesús