Legged robot

They are more versatile than wheeled robots and can traverse many different terrains, though these advantages require increased complexity and power consumption.

Dynamic support is provided by keeping the trajectory of the center of gravity located so that it can be repositioned by forces from one or more of its legs.

As such, they face two primary problems: Stability control is particularly difficult for bipedal systems, which must maintain balance in the forward-backward direction even at rest.

[1] Some robots, especially toys, solve this problem with large feet, which provide greater stability while reducing mobility.

Alternatively, more advanced systems use sensors such as accelerometers or gyroscopes to provide dynamic feedback in a fashion that approximates a human being's balance.

[2] Simple bipedal motion can be approximated by a rolling polygon where the length of each side matches that of a single step.