The reachable 3-D workspace volume is a measure of payload and body-mass-index: A quasi-static kinetic assessment.
Appl Ergon
; 75: 108-119, 2019 Feb.
Article
in En
| MEDLINE
| ID: mdl-30509515
ABSTRACT
An experimental protocol with five tasks is proposed for a low-cost empirical assessment of the reachable 3-D workspace (RWS), including both close-to-torso and far-from-torso regions. Ten participants repeated the protocol for four distinct hand payloads. The RWS expressed as a point cloud and its non-convex alpha-shape were obtained for each case. Moreover, individual strength surrogates for glenohumeral flexion and abduction, and elbow flexion were collected using a dynamometer. The RWS volume was statistically modelled using payload, body-mass-index and the strength surrogates as predictors. For increasing payload, a significant (râ¯=â¯-0.736,pâ¯<â¯0.001) decrease in RWS volume was found for distinct payload cases across all subjects. The only significant predictors found for the RWS volume were normalized payload (Fâ¯=â¯73.740,pâ¯<â¯0.001) and body-mass-index (Fâ¯=â¯11.008,pâ¯=â¯0.003). No significant interactions were found. The consequent regression model (F(2,27)â¯=â¯41.11, pâ¯<â¯0.001, Radj2â¯=â¯0.7345) explained around 73% of the variation in the data. The RWS volume is a function of payload and body-mass-index.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Body Mass Index
/
Workload
/
Ergonomics
/
Interior Design and Furnishings
Type of study:
Prognostic_studies
Limits:
Adult
/
Humans
/
Male
Language:
En
Journal:
Appl Ergon
Year:
2019
Document type:
Article