A couple of years ago, a video from 2006 was published on Habrahabr with quite a decent ride on a bicycle robot. The usefulness of this skill even then caused some distrust. However, let me present the next craft presented by Masahiko Yamaguchi this year at IRex 2011 . I liked that this robot really pedals, pressing on top, and stopping puts its feet on the ground and waves a handle (as in the exam for category A). That is, unlike the predecessors having legs welded to the bicycle, this one is quite autonomous. Honestly, this is where his achievements end, so what's next is a video and a little more about his device.
To control deviations, the robot uses, which has already become common, the vestibular apparatus of modern technology - a gyroscope. For computing and motion control, the author has made a self-made system based on the SH7125 microprocessor. ')
The robot is able to ride only on its own personal bike, a feature of which are rigidly fixed asterisks. That is, if you stop pedaling, the wheel will be blocked, or rather, it will start pedaling itself by inertia (unlike a normal bicycle, where there is a neutral course).
And finally, why is it still called a robot ? The “inventor” claims that the robot is able to balance and rotate, and for the time being, it can only determine the direction of movement of the craft by guided by radio signals from the console from a person. The author, of course, is doing his best to work on artificial intelligence for autonomous navigation, but it seems to me that Comrade Yamaguchi is still far away from this. Good luck!