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March 27, 2008, 07:30 |
Vibrations & Curve-fitting
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#1 |
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Hi Guys, I'm working on a 2d aeroelastic solver. I have a system with 2 degrees of freedom (pitch & plunge) and the code currently generates 3 output variables: time t, pitch p and plunge h.
I can plot graphs of p and h vs t and can tell by eye whether the oscillations are diverging (flutter) or remain stable. I want to automate this procedure, however. I think I'll need some sort of curve fitting algorithm - essentially the oscillations are damped sinusoidal functions of time. I could then automate the process so that the code will determine whether flutter is occurring or not. I don't really know where to begin and was hoping that someone could point me in the direction of a useful beginners guide to curve fitting? I prefer to write my own codes so want to build the fitting tool from the ground up so it'll integrate fully with my current work. If someone could suggest a starting point I'd be very grateful. many thanks, B |
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March 29, 2008, 19:42 |
Re: Vibrations & Curve-fitting
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#2 |
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You can use the GNU scientific library for this purpose.(http://www.gnu.org/software/gsl/)
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