Hi everybody,

I have some experimental data from an oscillating system (time domaine) and I would like to get an approximation of the damping ratio (zeta). I have already try to use the half-power band width method with the vibrationdata Matlab package designed by Tom Irvine. But I would like to double-check the result with another method.

I found several methods in this paper and I would like to try to do the curve fitting method with the Curve Fitting Toolbox of Maple or Matlab (R2014b) (2.2.2 Curve fitting in the paper). data.txt

It's the first I use this Toolbox with a custom equation, so, I do not really know how to do it with my sample data.

Can anybody help me with this ? I have attached the .txt file sample data to this post.

Cheers

Hello everybody,

I am new on this forum, and please to join your community.
As part of a project related to Origami, I try to follow the paper entitled "Mathematical Approach to Model Foldable Conical Structures Using Conformal Mapping", in order to flat-fold a conical structure.

As described in the paper a non-linear system need to be solved in order to get a corrected angle beta... The paper advize the use of "fsolve" function in Matlab, but I did not manage to do it... So I tried with Maple, but I get an error using NLPSolve, and I do not understand why...

Here is the edited, withdrawn and finally back file : Angle.mw

Do not hesitate to ask for any other explanations.

Any help is going to be appreciated.

Cheers,