The invention discloses a two-stage vibration reducing
ankle-foot integrated parallel low-
impact walking foot mechanism and a controlling method, which can be used for effectively reducing foot-ground
impact force and are capable of performing
active control. The walking foot mechanism comprises a foot-leg connecting platform, a food end bottom connecting platform, three groups of moving pairs, three groups of revolute pairs and three groups of ball pairs, a lower platform simulates the foot end of a
robot, the moving pairs are driving pairs, and are used for simulating legs of the
robot, an anti-vibration pad, with frictional force, is inlaid in the lower surface of the food end bottom connecting platform, and is used as first-stage vibration reduction, the three groups of moving pairs are arranged in a mirror symmetry manner, and each group of moving pair comprise a
hydraulic cylinder, a spring
damper, a
servo valve and a controller, wherein the spring
damper sleeves a cylinder
piston rod of the
hydraulic cylinder, and is used as second-stage vibration reduction, so that the whole mechanism forms a lower-mobility parallel mechanism with a three freedom
degree structure, and two
rotational freedom along the directions of x and y and a translational freedom degree along the direction of z are realized. The mechanism and method provided by the invention have the advantages that the plan and control of the
robot are flexible and reliable, and the stability is high.