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A humanoid robot capable of carrying heavy objects

Published online by Cambridge University Press:  10 September 2010

Hyeung-Sik Choi ,
Wonhyun Na  and
Dongwan Kang
Hyeung-Sik Choi*
Affiliation:
Korea Maritime University, Division of Machanical and Information Engineering College, 1 Dongsam-dong Yeongdo-gu, Busan, Korea
Wonhyun Na
Affiliation:
Hyundai Rotem Company. E-mail: the1stdiv@hotmail.com, Sam-dong Uiwang-city, Kyungki-do, Seoul, Korea
Dongwan Kang
Affiliation:
Samsung Machine Tool Engineering Company. E-mail: nims1894@hotmail.com, Gasul-ri, Changwon-city, Korea
*
*Corresponding author. E-mail: hchoi@hhu.ac.kr
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Summary

A new type of 28-DOF (degree of freedom) full-size humanoid robot, driven by a closed-chain type of joint actuation system, is developed in this paper. Each leg of the robot is composed of six joints, where three are at the hip, one is at the knee, and two are at the ankle. The robot has six joints for each arm, one balancing joint, and three joints for the head, with two cameras. The weight of the robot is 75 kg, and its height is 168 cm.

The actuation systems of the pitching joint for the arms and legs of the robot are designed based on a closed-chain mechanism composed of four bar links driven by a ball screw, and each leg of the robot is designed to support 95 kg weight to include a 20 kg payload that can be carried by the robot arms having very light designs (with weight 8.5 kg), but each capable of carrying a 10 kg payload.

An analysis of the closed-chain joint actuation systems of a light arm capable of handling heavy objects is performed, and the light arm is designed via finite-element method analysis performed using ANSYS. In addition, the kinematic analysis and the detailed structure of the arm and leg of the robot are performed.

The main controller uses the ARM processor and a distributed controller for the leg joints is developed using the TMS320c2407 processor with the communications between the main and joint controllers being performed via the CAN system.

Good performances of the proposed robot is demonstrated by presenting several experimental results; these include (1) experimentally handling a 13 kg payload, (2) through walking experiments of the robot supporting a 85 kg load, and (3) measurements of the arm and leg joint motors while performing walking experiments.

Keywords

Humanoid robotsDesignControl of robotic systemsSensor or actuator designBipeds
Type
Articles
Information
Robotica , Volume 29 , Issue 5 , September 2011 , pp. 667 - 681
Copyright
Copyright © Cambridge University Press 2010

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