Walking Trajectory Generation for Humanoid Robots with Compliant Joints: Experimentation with COMAN Humanoid

Zhibin Li, Nikolaos Tsagarakis, Darwin G. Caldwell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This work introduces a walking pattern generator suitable for humanoids with inherent joint compliance. The proposed walking pattern generator computes the desired center of mass (COM) references on-line based on the COM state feedback. The position and velocity of the COM are the feedback variables, and the constraint ground reaction force (GRF), which is limited by the support polygon, is the control effort to drive the COM states to track the desired ones. The zero moment point (ZMP) is obtained naturally as a result of GRF interaction with robot feet. The proposed COM tracking scheme demands a lower bandwidth from the controller compared to the ZMP tracking schemes. Experimental data of the real compliant humanoid, such as ZMP, COM motion, and GRF are presented to demonstrate the validation of the proposed gait generation method.
Original languageEnglish
Title of host publicationRobotics and Automation (ICRA), 2012 IEEE International Conference on
Place of PublicationMinnesota, USA
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Electronic)978-1-4673-1404-6
ISBN (Print)978-1-4673-1403-9
DOIs
Publication statusPublished - 2012

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