Since the wheel doesn't roll side to side, I imagine it's much the same as balancing a bicycle.
Also, since the wheel doesn't roll in that axis, it would also (I think) be impossible to auto-stabilise, since there is no steering capability. Perhaps it could have weights slide around to try to balance it, but I can't see that being particularly effective.
Also, since the wheel doesn't roll in that axis, it would also (I think) be impossible to auto-stabilise, since there is no steering capability. Perhaps it could have weights slide around to try to balance it, but I can't see that being particularly effective.