I have got this question: let's suppose that I have three signals, representative of the same variable, but taken on three different component of a same device; in my case, three load signals, representative of the out-of-plane bending moment Mx of each of the blade of a wind turbine.
Is it any possible to effectively and efficiently detect the degree of imbalance or asymmetry of such signals?
imbalance I mean a single parameter/variable which gives information about how the three signals differ from each other.
I would then set-up a threshold value to this degree of difference, in order to further trigger a certain process when the threshold has been overcome.
The first idea I came up with is multiple correlation, but perhaps there exist tons of better methods.
- Each signal coming from each blade;
- Blades placed with 120 deg phase shift;
- Azimuth angle vs. Time available.
- Regarding balance vs. unbalanced, I only know that unbalanced condition leads to higher loads on blades. In general, the three signals will always be unbalanced: what I would like to ascertain is the degree of imbalance; is it over a defined allowed limit or not?