Andy
Ruina explains how bicycles balance. (8 min) 2011, part of publicity for the Zero-trail, Zero angular momentum bicycle.
A
bicycle in zero gravity is unrideable (The bricycle).
(3 min) 2014
Cornell Ranger 2011 - Marathon Walking Robot. (4 min) Cornell Ranger, a 4-legged Biped Robot, walks 40.5 miles on a single battery charge.
Powered Biped With Knees. (2 min) A 3D, efficient, powered bipedal walking robot developed by Steve Collins.
Passive
Dynamic Walking. (3 min) A collection of passive
dynamic walkers. Each walker walks down a slight incline powered only by
gravity.
Passive
Dynamic TinkerToy Walker. (1 min)
Tinker Toy passive dynamic walker cannot stand upright but can stably
walk downhill. It is powered only by gravity.
Stable
and efficient bipedal robot platform - NRI PI Meeting 2016. (2
min) Information about Tik-Tok, a walking robot being developed at Cornell
Passive Dynamics is a good basis for walking control. Not. (~70 minutes + 60 minutes of questions) IIsc Feb 2, 2022 (Evolved version of above below)
Gliders,
bicycles and walking robots. (1hr, 11 min) Andy Ruina,
Carnegie Mellon Robotics Seminar, 2012 (Old version of the same talk as above)
Non-holonomic mechanics and Rotation with Zero Angular Momentum (The Falling cat) (80
min total) as deliverred to the Indian Centre for
Theoretical Sciences (ICTS) in Bangalore on April 25, 2022. Here
it is, in two parts, from a class-room version in Fall 2020. Part I, Part II
A
critique of Induced Acceleration Analysis. (15 min)
Andy Ruina, World Congress in Biomechanics, Boston, 2014
[Also see Mechanics for Biomechanics, part II therein, below]
Mechanics for biomechanics, A. All of Mechanics, B. Induced Accelerations, C. Collisions (40-min), Andy Ruina, ISB/ASB 2019 Calgary
Passive
Dynamics needs accurate complex modeling, controlled dynamics often
doesn't. (24 min) Andy Ruina, Dynamic Walking
Conference 2018, Pensacola.
Why don't bicycles fall down? (80 min) Ithaca Science Center, June 2019
Sliding with infinite friction (40 min) Banff 2014 Contact mechanics conference
Intermediate Dynamics, MAE 4730/5730 Fall 2020 42 lectures
Applied Dynamics, MAE 4710/5710 Spring 2020
First 21 Lectures on Panopto
Final 18 lectures on Cornell's VOD (Video on Demand). Sortws by creation date, ascending,
Sophomore Dynamics, MAE 2030 Spring 2021 40 lectures (same as below, some Covid hybrid-class video problems, early lectures are bad)
Dynamics Spring 2013, MAE 2030 28 lectures (Older, but better video than above)
also on YouTube
Statics and Strength of Materials, MAE 2020 Fall 2010 41 lectures
Linear Algebra, MAE Math 2940 Spring 2009 41 lectures
Intro to Engineering for Freshman, MAE 1170 28 Lectures
Disorganized and largely boring