How to run Simscape PEM Fuel Cell model with discrete fixed-step solver

Hey MathWorks community!

I am trying to run this PEM Fuel Cell Model with a discrete fixed-step solver.

So far i changed all continuous blocks with their discrete equals but i think the MEA (Membrane Electrode Assembly) block is still a contiuous one. Has anyone any idea how to solve this?

Thanks in advance!

Daniel

Answer 1

[Pratik]

Hi Daniel,

As per my understanding, you want to simulate the PEM Fuel Cell Simscape model example using discrete fixed-step solver. And to achieve the same have changed all continuous blocks to their discrete equivalent, but Membrane Electrode Assembly block is still continuous.

“FixedStepDiscrete” solver cannot be used with Simscape products because those models will always include continuous states. A possible workaround is to use solvers like “ode1” or “ode2” which permits fixed step simulation of models that include continuous states.

Please refer to the below documentation for more information on how to choose a solver:

www.mathworks.com/help/simulink/ug/choose-a-solver.html

Hope this helps!

[Naima]

Hi Pratik,

I want to the same model with fixed step solver. Only ode1be solver works but it has very slow responses. Have you any idea how to solve this problem ?

You can refer to my post related to this problem.

Thank you,

Naima