what is difference between dlinmod and dlinmodv5? which is better for linearization?

I have used dlinmod function for linearization my model, but that did not work as expected. but with dlinmodv5 is good linearized. what is difference between them?

Answer 1

[Sebastian Castro]

According to the dlinmod documentation, using v5 invokes a perturbation algorithm from an older release. While this is not necessarily worse, it's different. There is also this note:

"The default algorithms in linmod and dlinmod handle Transport Delay blocks by replacing the linearization of the blocks with a Pade approximation. For the 'v5' algorithm, linearization of a model that contains Derivative or Transport Delay blocks can be troublesome."

NOTE: If you happen to have the Simulink Control Design product, the linearize function tends to be better than linmod.

- Sebastian