According to the movement characteristics of parallelogram links mechanism,a wheeled UGV had remarkable performance of obstacle-surmounting.The new type wheel-legged UGV overcome the defects that the previous UGV could not cross the groove by adding swing arms and planet gears.It had good adaptability to the unstructured ground.The paper described the structure of the wheel-legged UGV in details,and analyzed the movement characteristics,and established the dynamics model by using the Lagrange equation.Final...