Andy with sewn hat

Andy Ruina

I have a robotics and biomechanics lab. I teach mechanics and basic math classes. My main study is coordination, mostly legged locomotion. I like classical rigid-object dynamics especially contact (collisions, friction, non-holonomic constraints). I used to work mostly on friction and sliding instability. I have also worked on bicycles, solid mechanics and fracture. I usually prefer simple and ideal models. My degrees are from Engineering at Brown (ScB. 76, ScM. 78, Ph.D. 81).

Mechanical Engineering
(formerly in TAM)

566 Upson Hall
Cornell University
Ithaca, New York 14853
+1 607 327-0013


Personal information (Addresses, contacts, India, etc.)
Facebook page (No account needed) 
Where is Andy right now? (GPS location)
Finland information

Some things Andy has worked on

Dynamic Walking 2017,  Ă…land, June 2017.
Animal Coordination seminar:- 1st yr sched.
TAM Seminars: Planning for 02-03 season.
RIBs: Recycle Ithaca's Bicycles:
         helps people fix and earn bicycles.
Face Masks

Office hrs 
    Fall 2023: Some live and some in
Andy's zoom room Password: Andy Ruina
    Days, times and places to be determined.


Courses (most recent at top)

ME 226  Applied Dynamics I, IISc (Fall 2023) 
ME 2030  Dynamics (Spring 2021)
Lecture Videos (2013)

ME 4730/5730 Piazza Intermediate Dynamics (Fall 2020)

                  Canvas site (w/ lecture videos).
MAE 4710/5710
Applied Dynamics: Robots,

                       machines and biomechanics  (Sp '2020)

ENGRG 1112
Practical computing with Matlab (Fall 2019)

Robotic Bike team (2017-19). Bicycle Team Papers.
Robotic Sailboat team

Walking House (w/ Architecture) 2017-2018

  Freshman advising 2017-2018

ME 6700
: Advanced Dynamics (Spring 2016)

ME 5070
: Flight Dynamics (Spring 2015)

TAM 7960
: Legged locomotion of robots and animals (fall 2014, not).

TAM 2020: Statics and Mechanics of Materials. Lecture Videos.

Engr 1170
: Intro to Mechanical Engineering. Lecture Videos.

MATH 2940: Sophomore linear algebra. Lecture Videos.

TAM 570
: Introduction to analytical mechanics.

MATH 1910: First semester calculus (Fall 2005)

TAM 663: Intro to Solid Mechanics (Notes from about 1990)

ME 3250
: A junior mechanical design analysis.

TAM 674
: Applied Multibody Dynamics (Arend Schwab).

MATH 2930: A sophomore math class (mostly ODEs).

: A student team built a pedaled rough-terrain vehicle (Moonbuggy mirror site). (2002 Moonbuggy Site)

Course Related 

Text Book:  Statics and Dynamics
Matlab tutorials, one each for Cornell Eng. Math courses
(1910, 1920, 2930, 2940).

MATH 293 & 294 problems:
     Hundreds of  problems from MATH 293 and MATH 294.

Website Administration (not publicly accessible)

 (old) Lab bureaucracy (not publicly accessible).