A Concept for a robot arm with adjustable series clutch actuators and passive gravity compensation for enhanced safety

Alexander Schmitz, Soumya Bhavaraju, Sophon Somlor, Gonzalo Aguirre Dominguez, Mitsuhiro Kamezaki, Wei Wang, Shigeki Sugano

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

6 Citations (Scopus)

Abstract

Passive compliance is useful for robotic arms to ensure their safety. Often springs are used, but they are problematic because they reduce the achievable accelerations and can lead to underdamped oscillations. Torque limiters enhance the safety, but usually the torque limit cannot be adjusted to a desired torque. Electronically adjustable torque limiters, also known as series clutch actuators, have several benefits, especially for robotic arms, but they also have severe limitations. This paper suggests incorporating series clutch actuators into a gravity compensated arm. Consequently, gravity should not limit the isotropically achievable force anymore and in the case of power outage the arm keeps its position. The benefits and limitations of a series clutch actuator in a gravity compensated arm are discussed, and a prototype of such an arm is presented. Commercially available magnetic friction clutches are used. Preliminary experiments demonstrate that the safety can be increased.

Original languageEnglish
Title of host publicationIEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1322-1327
Number of pages6
Volume2015-August
ISBN (Print)9781467391078
DOIs
Publication statusPublished - 2015 Aug 25
EventIEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2015 - Busan, Korea, Republic of
Duration: 2015 Jul 72015 Jul 11

Other

OtherIEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2015
CountryKorea, Republic of
CityBusan
Period15/7/715/7/11

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Computer Science Applications
  • Software

Fingerprint Dive into the research topics of 'A Concept for a robot arm with adjustable series clutch actuators and passive gravity compensation for enhanced safety'. Together they form a unique fingerprint.

Cite this