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Parameterized gait pattern generator based on linear invertedpendulum model with natural ZMP references

Published online by Cambridge University Press:  09 September 2016

Ya-Fang Ho
Affiliation:
Department of Electrical Engineering, aiRobots Laboratory, National Cheng Kung University, Tainan 70101, Taiwan e-mail: makinosakuya@hotmail.com, thsli@mail.ncku.edu.tw, coll22000@hotmail.com, s1020jason@gmail.com
Tzuu-Hseng S. Li
Affiliation:
Department of Electrical Engineering, aiRobots Laboratory, National Cheng Kung University, Tainan 70101, Taiwan e-mail: makinosakuya@hotmail.com, thsli@mail.ncku.edu.tw, coll22000@hotmail.com, s1020jason@gmail.com
Ping-Huan Kuo
Affiliation:
Department of Electrical Engineering, aiRobots Laboratory, National Cheng Kung University, Tainan 70101, Taiwan e-mail: makinosakuya@hotmail.com, thsli@mail.ncku.edu.tw, coll22000@hotmail.com, s1020jason@gmail.com
Yan-Ting Ye
Affiliation:
Department of Electrical Engineering, aiRobots Laboratory, National Cheng Kung University, Tainan 70101, Taiwan e-mail: makinosakuya@hotmail.com, thsli@mail.ncku.edu.tw, coll22000@hotmail.com, s1020jason@gmail.com

Abstract

This paper presents a parameterized gait generator based on linear invertedpendulum model (LIPM) theory, which allows users to generate a natural gaitpattern with desired step sizes. Five types of zero moment point (ZMP)components are proposed for formulating a natural ZMP reference, where ZMP movescontinuously during single support phases instead of staying at a fixed point inthe sagittal and lateral plane. The corresponding center of mass (CoM)trajectories for these components are derived by LIPM theory. To generate aparameterized gait pattern with user-defined parameters, a gait planningalgorithm is proposed, which determines related coefficients and boundaryconditions of the CoM trajectory for each step. The proposed parameterized gaitgenerator also provides a concept for users to generate gait patterns withself-defined ZMP references by using different components. Finally, thefeasibility of the proposed method is validated by the experimental results witha teen-sized humanoid robot, David, which won first place in the sprint event atthe 20th Federation of International Robot-soccer Association (FIRA) RoboWorldCup.

Information

Type
Review Article
Copyright
© Cambridge University Press, 2017 

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