I like the sound of this, in OpenFoam is both AMI and MFR? Just thinking this might be more applicable to transient simulations so AMI within an AMI. In the past, I did a pitch controlled wind turbine, but it was steady-state and I changed the geometry to evaluate the best pitch for different wind speeds. However, with the above implementation, we could simulate the transient effects of altering the pitch. This would work nicely with a free rotating definition of AMI as we could evaluate a blades rotation speed with changing pitch (a way of adding resistance to the free rotation would also make sense to simulate a generator).
Just adding another application example here