Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

FlexCVA: a continuously variable actuator for active orthotics.

Robert W Horst1, Richard R Marcus

  • 1Tibion Corp., Moffett Field, CA 94035, USA. bob.horst@tibion.com

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
|October 20, 2007
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A bio-robotic leg orthosis for rehabilitation and mobility enhancement.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference·2009
Same journal

Highly Articulated Robotic Probe for Minimally Invasive Surgery.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference·2010
Same journal

Combined peripheral and cortical neural stimulation in motor neurorehabilitation.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference·2008
Same journal

Embedded assessment algorithms within home-based cognitive computer game exercises for elders.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference·2008
Same journal

Digital signal processing of the wideband external pulse recorded during cuff deflation: a new way to measure blood pressure.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference·2008
Same journal

Immune cells detection of the in vivo rejecting heart in USPIO-enhanced magnetic resonance imaging.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference·2008
Same journal

wHospital: a web-based application with digital signature for drugs dispensing management.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference·2007
See all related articles

The novel FlexCVA actuator offers high torque and efficient free movement for active orthotics. This innovative design uses belts and cams for variable torque and automatic ratio adjustment, meeting key device requirements.

Area of Science:

  • Robotics
  • Biomechanics
  • Mechanical Engineering

Background:

  • Active orthotic devices necessitate actuators with specific performance characteristics.
  • Existing actuators often struggle to balance high torque, free movement, efficiency, and compact design.

Purpose of the Study:

  • To introduce and evaluate the FlexCVA, a novel actuator designed for active orthotic applications.
  • To demonstrate the FlexCVA's capability to meet the demanding requirements of active orthoses.

Main Methods:

  • The FlexCVA utilizes a unique mechanism with two belts alternately deflected by cams to provide continuously varying torque.
  • The drive ratio is automatically adjusted based on load by altering belt deflection.
  • A prototype was developed and tested to measure performance metrics.

Related Experiment Videos

Main Results:

  • The FlexCVA prototype achieved an output torque of up to 34 Nm.
  • The actuator demonstrated a free movement mode, allowing backdriving at speeds exceeding 400 deg/sec.
  • The design inherently provides variable torque and automatic load-responsive ratio adjustment.

Conclusions:

  • The FlexCVA actuator successfully addresses the critical requirements for active orthotic devices.
  • Its innovative design offers a promising solution for high-performance, compact actuators in wearable technology.
  • Further development could enhance its applicability in advanced orthotic systems.