Recent content by liquidFuzz

True! I have transferred the shape into a CAD program and I had to calculate (approximated) Bézier splines to keep the nodes at a reasonable level. I think I ended up with 12 nodes or so to get a smooth contour that was fairly similar to the shape I was going for. The continuation of this is...

I tried your excel-file and it crashes as soon as I edit length, width, and string length. :-/ My don't crash so I stick with the analytical solution for now. I think I'll just go with brute force for the corners, when I have some spare time.

How big is e, in your approximation? Cool! I also hold a masters degree in physics. :-)

BVU, I have read all your posts. Stating "I'm not sure I follow you" was me trying to be polite about the fact that your approximation is not so good. :angel: The shape is ellipsoid in appearance but it is not an ellipsoid. So, as stated before. I have an analytical expression for the sides...

I'm not sure I follow your calculations BVU. Is it what I'm looking for..? I attached the excel I tried the calculations in. There you can see the segments I still haven't got, the corners. Oh, I should mention that I used Libreoffice for this tinkering. Edit, these spread sheets are a bit...

As I wrote in the first post, the sides of the rectangle are a and b. e is the extension of the string, thus the string is 2b+2b+e.

For the "sides" I came up with this, which seems to be right when I plot it. ##y(x)=\frac{\sqrt{e}*\sqrt{2x+e}*\sqrt{4a^{2}-4ax+4ea-2ex+e^{2}}}{\sqrt{4a^{2}+8ea+4e^{2}}}## y is the displacement, for lack of better word, from this rectangle sides. Edit, e is the extension of the string, i.e...

Thanks BVU! I just need a software able to plot the points/lines. I think I'm going to use this shape for some cnc-stuff so excel won't cut the cheese. Would you mind elaborate on how you derived at the arctan() solution? Thanks Factchecker for the input!

I have a shape based on the idea of having a string, a closed loop, that is sitting outside a rectangle. The string is d longer than the circumference of the rectangle. I noted the sides as a and b. The shapes is formed by drawing a line around the rectangle with the string as a constraint of...

I have a scenario where I would like to calculate the electronics needed to create a force (pull on) an iron object. The set up is a coil (solenoid) with a steel (iron) object. I use Maxwell's equation (Ampere's law) to estimate the magnetic field B of the solenoid. My question is, how to...

I have a game where heroes have a set of traits, or abilities. The level of the abilities are raised in two ways, by banner cards and/or by leveling the hero. The Banner cards and heroes don't match perfectly, rather a banner card can match 1 or 2 (sometimes 3) abilities of the heroes abilities...

I've set up an expression for the current in a stepper motor coil. Each current pulse resembles a trapezoid in the time domain. Now I'm trying to figure out how to best use this to model the torque behavior for different RPS. My ide was to integrate over time to get the whole pulse...

Oh, i forgot mentioning. The timing is periodic atm. 0,335 and 0,408 between samples. The 0,335 is used 5 times for each 0,408 timing.

Thanks for all the input! I'll check the numerical approach suggested. So far I only really tried to attack the issue by contacting the manufacturer of the measuring device I'm tinkering with to see if I can change the sample rate.

Hi How do I find the frequencies in a signal obtained by samplings with a random sample rate? Normally I use a fft analysis, but then I have a fixed sample rate. Thanks!