Design of a cosmetic glove stiffness compensation mechanism for toddler-sized hand prostheses

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)
37 Downloads (Pure)

Abstract

The addition of a cosmetic glove to an upper limb prosthesis has a distinct effect on the cosmetic value, but its viscoelastic behaviour adds a substantial amount of stiffness and hysteresis to the system. As a result, the overall usability of the prosthesis is degraded. A novel negative stiffness element is designed to compensate for the cosmetic glove’s stiffness. A combination of linear helical springs and the concept of rolling link mechanisms has resulted in a Rolling Stiffness Compensation Mechanism (RSCM). Results show that the RSCM is capable of exerting a progressive negative stiffness characteristic and can be built small enough to fit inside a 33 mm diameter wrist. Using the RSCM, an otherwise voluntary opening toddler-sized prosthesis is converted into a voluntary closing device, reducing maximum operation forces down to 40 N with a combined efficiency of 52%. Further adjustments to the design are possible to further improve the efficiency of the mechanism. Moreover, changes in geometric relations of the mechanism offers possibilities for a wide range of prostheses and other applications.

Original languageEnglish
Article numbere0183233
Number of pages14
JournalPLoS ONE
Volume12
Issue number8
DOIs
Publication statusPublished - 2017

Keywords

  • OA-Fund TU Delft

Fingerprint Dive into the research topics of 'Design of a cosmetic glove stiffness compensation mechanism for toddler-sized hand prostheses'. Together they form a unique fingerprint.

Cite this