How to Design a Wheel That Rolls Smoothly Around Any Given Shape

Published: 20 December 2022
on channel: Morphocular
1,742,315
27k

Go to https://brilliant.org/Morphocular to get started learning STEM for free. The first 200 people get 20% off an annual premium subscription.

In previous videos, we looked at how to find the ideal road for any given wheel shape and vice-versa, but what about getting two wheels to roll smoothly around each other? Would two such wheels work as gears?

Episode 1:    • The Perfect Road for a Square Wheel a...  
Episode 2:    • How to Design the Perfect Shaped Whee...  

=Chapters=
0:00 - Intro
1:23 - Defining smooth rolling
2:30 - Sidenote about gears
3:16 - The Wheel-Coupling Equations
7:34 - Sanity check
9:24 - The partner for an ellipse
12:24 - The connection between ellipses and parabolas
13:23 - Finding self-coupling wheels
16:35 - The partner for a square
19:21 - A look back
20:20 - A fractal wheel??
20:47 - Brilliant ad


===============================
I would also like to thank the user @BeekersSqueakers whose comment I think it was that taught me that a partner wheel can be generated by first generating a road and then generating a wheel on its underside. This comment was directly responsible for inspiring the technique shown in this video to easily generate self-coupling wheels, and dramatically simplified the second half of this video! So a seriously genuine thank you to @BeekersSqueakers and to all those who actually took up the call to answer my challenge problems in a comment! They can have a surprisingly big impact sometimes!


===============================
For a deeper dive into the concepts explored in these videos, take a look at the paper "Roads and Wheels," an article by Leon Hall and Stan Wagon that appeared in Mathematics Magazine, Vol. 65, No. 5 (Dec 1992). You can find it here:
https://web.mst.edu/~lmhall/Personal/...


===============================
CREDITS

The music tracks used in this video are (in order of first appearance): "Rubix Cube", "Checkmate", "Ascending", "Orient", "Falling Snow"

The track "Rubix Cube" comes courtesy of Audionautix.com


===============================
Want to support future videos? Become a patron at   / morphocular  
Thank you for your support!


===============================
The animations in this video were mostly made with a homemade Python library called "Morpho". If you want to play with it, you can find it here:
https://github.com/morpho-matters/mor...


Watch video How to Design a Wheel That Rolls Smoothly Around Any Given Shape online without registration, duration 21 minute 58 second in high quality. This video was added by user Morphocular 20 December 2022, don't forget to share it with your friends and acquaintances, it has been viewed on our site 1,742,315 once and liked it 27 thousand people.