solver for digital systems

Hi,

is it better to set Solver to "discrete (no continuous states)" for digital systems?

Thanks Senmeis

Answer 1

[Azzi Abdelmalek]

When I work with digital system, I prefer set solver to discrete with fixed step. Now If you don't set a solver to discrete, and your system don't contain any continuous state, when you run your model, Matlab will set automatically the solver to variable discrete solver.

[Owen]

I have owen problems with fixed step. There is upsampling in my digital system so if fixed step is set I get more data than usual. Does this mean only variable step can be set for my case?

Senmeis

[Azzi Abdelmalek]

If your sample time is varying, then you can work with variable discrete step. In your blocks that requires sample time, set it to -1 (Inherited), usually, it's the default setting. If your model don't contain any continuous state, set your solver to discrete, to avoid error message, because Matlab, like I said, will set it automatically.