jones_supa writes: A very challenging quadrocopter problem has been tackled: juggling a pendulum between two copters. As part of his Master thesis Dario Brescianini, student at ETH Zurich’s Institute for Dynamic Systems and Control, has developed algorithms that allow quadrocopters to juggle an inverted pendulum. To get an impression about what that means, have a look at the video. Armed with a good theoretical model and knowledge of its strengths and limitations, the researchers set out on a process of engineering the complete system of balancing, throwing, catching, and re-balancing the pendulum.
"All the people are so happy now, their heads are caving in. I'm glad they
are a snowman with protective rubber skin"
-- They Might Be Giants