User talk:Shooky56

Unassisted Bike Animation

Nice piece of work sir, enjoyed!

I authored a free piece of software available on the www.recumbents.com homepage (2nd thing under the world record bike article). I am a retired software engineer and an upright cyclist (bronze medalist in the US Senior Nationals in the triathlon in 2007).

As a software engineer I designed and authored the first PC based flight simulator with shading over 30 years ago (boy 3D programming was tough back then!).

At any rate, I was considering adding a "frame simulator" to the shell builder software. I can do the physics of turn rate and momentum, center of gravity and the force angle applied to the frame but didn't have an approach to produce turn angle based off front geometry and lean. Can you point me in the right direction? Probably could gather some empirical info off my uprights that do nothing but hang from the ceiling these days!

Thanks for any consideration you feel like giving. If you don't feel proprietary about the loop you used to generate the data for the graphics, I could reverse engineer the mechanical behavior out of it unless it was just a "hey it looks like this thing w/o the real physics behind it" sort of animation.

Shooky56 (talk) 19:04, 3 November 2015 (UTC)[reply]

Yes, I can point you in a good direction. The correct linearized equations along with the MATLAB program to specify values and calculate responses are available for free download at http://ruina.tam.cornell.edu/research/topics/bicycle_mechanics/JBike6_web_folder/
They were validated in this paper: http://rspa.royalsocietypublishing.org/content/royprsa/463/2084/1955.full.pdf
The little animation I posted are from the non-linear equations I implemented from Schwab's class notes. I confirmed that they agree with the benchmarked linearized equations in this paper: https://pantherfile.uwm.edu/adressel/www/publications/DETC2011-47344.pdf
Good luck. Let me know if I can help further, and I look forward to hearing about your progress. -AndrewDressel (talk) 20:55, 3 November 2015 (UTC)[reply]

Thanks Andrew and will do! 70.100.46.105 (talk) 20:49, 4 November 2015 (UTC)[reply]