The Design of the Lower Body of the Compliant Humanoid Robot `cCub'

Nikolaos Tsagarakis, Zhibin Li, Jody A. Saglia, Darwin G. Caldwell

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


The “iCub” is a robotic platform that was developed by the RobotCub [1] consortium to provide the cognition research community with an open “child-like” humanoid platform for understanding and development of cognitive systems [1]. In this paper we present the mechanical realization of the lower body developed for the “cCub” humanoid robot, a derivative of the original “iCub”, which has passive compliance in the major joints of the legs. It is hypothesized that this will give to the robot high versatility to cope with unpredictable disturbance ranging from small uneven terrain variations to unexpected collisions or even accidental falls. As part of the AMARSI European project, the passive compliance of this newly developed robot will be exploited for safer interaction, energy efficient and more aggressive damage-safe learning. The passive compliant actuation module used is a compact unit based on the series elastic actuator principle (SEA). In addition to the passive compliance the “cCub” design includes other significant updates over the original prototype such as full joint state sensing including joint torque sensing and improved range of motion and torque capabilities. In this paper, the new leg mechanisms of the “cCub” robot are introduced.
Original languageEnglish
Title of host publicationRobotics and Automation (ICRA), 2011 IEEE International Conference on
Place of PublicationShanghai, China
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Print)978-1-61284-386-5
Publication statusPublished - 2011


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