Some Mathematica notebooks for the lab
Papers
Blackburn and Baker, Comparison of commercial chaotic pendulums, AJP 66 (1998).
Baker, Control of the chaotic driven pendulum, AJP 63 (1995).
Baker, Inverting Chaos, CHAOS 6 (1996)
Baker, Pendulums, Am. J. Phys. 74 (2006)
Blackburn and Gronbech-Jensen, Phase diffusion in a chaotic pendulum, PRE 53 (1996).
Blackburn, Driven Pendulum, Rev. Sci. Inst (1989)
Laws, Oscillations and Chaos, Am. J. Physics 72 (2004)
Baker and Gollub, Chaotic Dynamics, chapters 1 through 4
Baker and Blackburn, The Pendulum, chapters 2, 3, 6.
Student Reports
Chaotic Pendulum student report (Colorado State)
Chaotic Pendulum student report (Maryland)
Chaotic Pendulum student report (Brandeis)
Chaotic Pendulum student report (Brandeis)
Last, but not least, student report (Brandeis)
Bibliography
References on nonlinear dynamics of the pendulum
References on Controlling Chaos, Gauthier AJP 71 (2003)
Simulations
http://www.elmer.unibas.ch/pendulum/spend.htm
http://www.elmer.unibas.ch/pendulum/index.html
http://www.myphysicslab.com/pendulum2.html
http://www.phy.davidson.edu/StuHome/chgreene/Chaos/Pendulum/pendulum_content_frame.htm