An electric drive system including: a rotary motor system including a hub assembly, a first rotating assembly, a second rotating assembly, and a third rotating assembly, wherein the hub assembly defines a rotational axis about which the first rotating assembly, the second rotating assembly, and the third rotating assembly are coaxially aligned and are capable of independent rotational movement independent of each other; a multi-bar linkage mechanism connected to each of the first and third rotating assemblies and connected to the hub assembly and constraining movement of the hub assembly so that the rotational axis of the hub assembly moves along a defined path that is in a transverse direction relative to the rotational axis and wherein the multi-bar linkage mechanism causes the rotational axis of the hub assembly to translate along the defined path in response to relative rotation of the first rotating assembly and the third rotating assembly with respect to each other.

A vehicle driving system including a driving/braking system including an in-wheel motor and an electromechanical brake installed in an inner side of a rim of a tire, a suspension system coupled to a rotational center shaft of the rim, and a steering system provided on an upper portion of the suspension system, wherein the suspension system includes a knuckle connected to the rotational center shaft of the rim, a plurality of first links each having one end connected to the knuckle, second links respectively connected to the other ends of the first links and the steering system, and a damper unit located between the knuckle and the steering system.

This application discloses a mobile robot and a method for controlling motion of the mobile robot. The mobile robot includes a first wheel part having a telescopic leg portion, a second wheel part having a telescopic leg portion, and a base part connected to the first wheel part and the second wheel part. The method includes: controlling the first wheel part and the second wheel part to be in a standing balance state, wherein the base part is parallel to a horizontal reference plane in the standing balance state; and controlling the mobile robot to perform bipedal-like motion based on the standing balance state, wherein, during the bipedal-like motion, the first wheel part and the second wheel part alternately touch the ground while the base part obliquely swinging.