MATLAB: Regarding discrete integration through ode45

Question

Hi,

I am studying a software written in simulink, which includes the signal integration block. The entire system is in a closed loop, where the current input to the integration block is dependent on the previous value given at the output of the block. Basically, the input to the block is a complex function. It is mentioned in the solver pane that the ode method used is ode45.

My intention is to convert the entire simulink block to a pure MATLAB/C code. Is it possible to know how the discrete integration is implemented by MATLAB/Simulink?

Thank you, Varad.

Answer 1

Can I ask why you want to convert the Simulink model to MATLAB or C code?

Simulink use complex semantics and mechanisms to solve the underlying mathematical equations of the system (see How Simulink Works and Choosing a Solver in the documentation for more details). It's not possible to convert a Simulink model to MATLAB code, which is why I ask what are the reasons for doing so.

It is however possible to automatically generate C code from Simulink models with Real-Time Workshop. This is typically for embedding control or signal processing algorithms onto real-time embedded systems, but can also be use for speeding-up simulations, integrating in larger simulation environments, batch processing, etc...

HTH,

Arnaud