This is design for an eco friendly mode of transport, it is the idea of a team of a students from the University of Adelaide. it is supposed to be based on the principle of a mono wheel bike, but with the obvious two wheels for added balance and stability. the Edward is still in development but a lot of ground has already been covered and it seems that the team are getting close to the finished product.
These are the details on the Edward electric Diwheel With Active Rotation Damping;
This honors project involved the construction of a human operated diwheel. Many diwheels in the past have been human powered or powered by IC engines. This one is purely electric. It has additional functionality lacking in other models, including inbuilt dynamic lateral stability and slosh control to prevent “gerbiling” or tumbling in aggressive braking or acceleration maneuvers. The diwheel also incorporates a unique feature that allows the rider to drive the vehicle when “upside down” – keeping the vehicle in its unstable state is achieved using a combined swing up and inversion controller. The mechanical design and some of the electronics was completed in 2009, with the majority of the electronics and control systems developed in 2010. A photograph of the final system is shown below.
Source [Oh Gizmo]