General Uncertainty Analysis for Manual Wheelchair Propulsion Dynamics and Development of an Instrumented Wheel

2006 ◽  
Vol 1 (2) ◽  
pp. 140-150
Author(s):  
M. Mallakzadeh ◽  
F. Sassani
Keyword(s):  
Uncertainty Analysis ◽  
Angular Position ◽  
Three Dimensional ◽  
Published Data ◽  
Wheelchair Propulsion ◽  
Wheelchair User ◽  
Wheelchair Users ◽  
Manual Wheelchair ◽  
Taylor Series Expansions ◽  
Propulsion Phase

Manual wheelchair propulsion (MWP) is an inefficient and physically straining process. A reliably fabricated and instrumented wheel can help researchers to accurately calculate the forces and moments exerted by the wheelchair users and propose strategies to improve MWP. In this study, an instrumented wheel is designed, fabricated, and validated by using general uncertainty analysis. A six-component transducer is used to measure three-dimensional forces and moments applied by the wheelchair user on the handrim. The output of the transducer are forces and moments, which are directly transmitted to a PC using a USB port. By developing the transformation equations, the actual forces and moments on the hand of the wheelchair user are calculated. The angular position of the hand on the handrim is calculated from the kinetic data obtained through the instrumented wheel, and the derived equations. The general uncertainty analysis method is used to calculate the uncertainty values for the variables of interest with the Taylor series expansions. An analysis of the results shows that it is possible to obtain reliable information for MWP by using the instrumented wheel. Most of the data have uncertainties under 5% during much of the propulsion phase, and the patterns and overall behavior of the results are comparable to published data.

scholarly journals Variability of peak shoulder force during wheelchair propulsion in manual wheelchair users with and without shoulder pain

2013 ◽  
Vol 28 (9-10) ◽  
pp. 967-972 ◽  
Author(s):  
Y. Moon ◽  
C. Jayaraman ◽  
I.M.K. Hsu ◽  
I.M. Rice ◽  
E.T. Hsiao-Wecksler ◽  
...  
Keyword(s):  
Shoulder Pain ◽  
Wheelchair Propulsion ◽  
Wheelchair Users ◽  
Manual Wheelchair

Unmatched speed perceptions between overground and treadmill manual wheelchair propulsion in long-term manual wheelchair users

2018 ◽  
Vol 61 ◽  
pp. 398-402 ◽  
Author(s):  
Félix Chénier ◽  
Audrey Champagne ◽  
Guillaume Desroches ◽  
Dany H. Gagnon
Keyword(s):  
Wheelchair Propulsion ◽  
Wheelchair Users ◽  
Manual Wheelchair

scholarly journals Dynamic Three-Dimensional Ultrasound to Evaluate Scapular Movement Among Manual Wheelchair Users and Healthy Controls

2015 ◽  
Vol 21 (4) ◽  
pp. 303-312
Author(s):  
Lynn A. Worobey ◽  
Yen-Sheng Lin ◽  
Alicia M. Koontz ◽  
Michael L. Boninger
Keyword(s):  
Three Dimensional ◽  
Healthy Controls ◽  
Wheelchair Users ◽  
Manual Wheelchair

scholarly journals A new manual wheelchair propulsion system with self-locking capability on ramps

2018 ◽  
Vol 9 (2) ◽  
pp. 359-371
Author(s):  
Gaspar Rodríguez Jiménez ◽  
David Rodríguez Salgado ◽  
Francisco Javier Alonso ◽  
José María del Castillo
Keyword(s):  
Physical Capacity ◽  
Propulsion System ◽  
The Self ◽  
Wheelchair Propulsion ◽  
Wheelchair User ◽  
Manual Wheelchair ◽  
Locking Mechanism ◽  
Time Periods ◽  
Manual Wheelchairs ◽  
Planetary Transmission

Abstract. A wheelchair user faces many difficulties in their everyday attempts to use ramps, especially those of some length. The present work describes the design and build of a propulsion system for manual wheelchairs for use in ascending or descending long ramps. The design is characterized by a self-locking mechanism that activates automatically to brake the chair when the user stops pushing. The system consists of a planetary transmission with a self-locking capacity coupled to a push rim with which the user moves the system. Different transmission ratios are proposed, adapted to the slope and to the user's physical capacity (measured as the power the user can apply over ample time periods). The design is shown to be viable in terms of resistance, and approximate dimensions are established for the height and width of the propulsion system. Also, a prototype was built in order to test the self-locking system on ramps.

scholarly journals Comparison Between Overground and Dynamometer Manual Wheelchair Propulsion

2012 ◽  
Vol 28 (4) ◽  
pp. 412-419 ◽  
Author(s):  
Alicia M. Koontz ◽  
Lynn A. Worobey ◽  
Ian M. Rice ◽  
Jennifer L. Collinger ◽  
Michael L. Boninger
Keyword(s):  
Kinetic Data ◽  
Cross Correlation ◽  
Pearson Correlation ◽  
Wheelchair Propulsion ◽  
Curve Shape ◽  
Wheelchair Users ◽  
Manual Wheelchair ◽  
Pearson Correlation Test ◽  
The Relationship ◽  
Tile Surface

Laboratory-based simulators afford many advantages for studying physiology and biomechanics; however, they may not perfectly mimic wheelchair propulsion over natural surfaces. The goal of this study was to compare kinetic and temporal parameters between propulsion overground on a tile surface and on a dynamometer. Twenty-four experienced manual wheelchair users propelled at a self-selected speed on smooth, level tile and a dynamometer while kinetic data were collected using an instrumented wheel. A Pearson correlation test was used to examine the relationship between propulsion variables obtained on the dynamometer and the overground condition. Ensemble resultant force and moment curves were compared using cross-correlation and qualitative analysis of curve shape. User biomechanics were correlated (R ranging from 0.41 to 0.83) between surfaces. Overall, findings suggest that although the dynamometer does not perfectly emulate overground propulsion, wheelchair users were consistent with the direction and amount of force applied, the time peak force was reached, push angle, and their stroke frequency between conditions.

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