10.5.10[2]

I managed to resurrect the code I had for evaluating intensity-based performance measures in Simulink. The problem now is that there doesn't seem to be much difference in the performance of the controllers from this perspective. There's definitely some variation in the actual number, but in terms of the average or value the differences seem to be minimal. I think there are 2 possible explanations for this.

1. Right now I'm still using 5 modes, and when looking at the modal coefficients or only the norm of the modal sequence I see definite improvement. But its possible that there content from the higher spatial frequencies is swamping the overall results. A good way to test this, and to see just how many modes I should use, would be to apply a disturbance and look at the closed-loop wavefronts projected onto all the modes. The size of the individual modal sequences and their correlation with the overall RMS wavefront should give me an idea of how many modes I need to see some improvement. Of course, I could also "cheat" by only applying the disturbance to the modes I can control. This might be a good test as well.

2. There might also be some nonlinear intensity bullshit going on that's affecting the measurement, but isn't showing up in the modal sequence. This should be evident if restricting the disturbance to the controlled modes doesn't help. If this is the case, I'm not sure there's much that can be done without the experiment rebuild that I'm planning.