Double inverted pendulum

From Wikipedia, the free encyclopedia

A double inverted pendulum is analog to the inverted pendulum. Where the single inverted pendulum has a mass at the endpoint of the pendulum, the double inverted pendulum has a second pendulum. Usually the double pendulum is mounted on a cart. The double pendulum is unstable, meaning that it will fall down unless the the cart is controlled by some control algorithm to keep the pendulums upright.