0

Full Content is available to subscribers

Subscribe/Learn More  >

Cable Friction Compensation and Rehabilitation Algorithms for a Cable-Driven Human Assistive System

[+] Author Affiliations
Joonbum Bae, Kyoungchul Kong, Masayoshi Tomizuka

University of California, Berkeley, Berkeley, CA

Paper No. DSCC2010-4022, pp. 777-783; 7 pages
doi:10.1115/DSCC2010-4022
From:
  • ASME 2010 Dynamic Systems and Control Conference
  • ASME 2010 Dynamic Systems and Control Conference, Volume 1
  • Cambridge, Massachusetts, USA, September 12–15, 2010
  • Conference Sponsors: Dynamic Systems and Control Division
  • ISBN: 978-0-7918-4417-5 | eISBN: 978-0-7918-3884-6
  • Copyright © 2010 by ASME

abstract

A cable-driven human assistive system has been developed to separate actuators from a human body. In the system, the assistive torque is transmitted via cables from the actuators to the end-effector which is to be attached on a human joint. The use of cables in flexible tubes allows for users to move freely without carrying the heavy actuators. However, the varying cable friction according to the curvature of the flexible tubes sets a challenge on the precise generation of the desired torque. To generate the desired torque precisely, a hierarchical control scheme is applied to the system. In this paper, the algorithms for determining the desired assistive joint torque and corresponding cable tensions are proposed. To determine the desired assistive torque, a rehabilitation strategy inspired by a potential field is discussed. For corresponding cable tensions, the algorithms for the cable tension controller which considers the varying cable friction as well as a bias for maintaining appropriate cable tensions are proposed. The performance of the proposed controller is verified by experiments.

Copyright © 2010 by ASME
Topics: Friction , Cables , Algorithms

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In