Development of tendon-driven robotic hand for biped humanoid robot

This paper describes a robotic hand that attaches to the wrist of a biped humanoid robot capable of mimicking a human motion. The robotic hand has five tendon-driven fingers that consist of a thumb, and an index, a middle, a ring, and a little finger. The fingers are composed of a V-grooved pulley, an E-type retaining ring, a hinge pin, and a torsional spring. The thumb has two motors for rolling and yawing motions and the other fingers have one motor for rolling motions. The effectiveness of the robot hands is confirmed through many grasping experiments.