Double inverted pendulum
A double inverted pendulum is the combination of the inverted pendulum and the double pendulum. The double inverted pendulum is unstable, meaning that it will fall down unless it is controlled in some way. The two main methods of controlling a double inverted pendulum are moving the base, as with the inverted pendulum, or by applying a torque at the pivot point between the two pendulums.
- Russ Tedrake (2009). "Underactuated Robotics: Learning, Planning, and Control for Efficient and Agile Machines, Course Notes for MIT 6.832" (PDF). University of California, Berkeley. Retrieved 2011-10-05.