Hoksbergen, Johan (2024) Optimization of pushrim-activated power assisted wheelchair structure to prevent tipping injuries. Bachelor's Thesis, Biomedical Engineering.
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Abstract
Pushrim activated power assisted wheelchair allow for users with some extent of functional use of upper extremities to propel themselves and thereby reduce muscular atrophy. However, wheelchair tipping injuries remain a safety concern for users, particularly those navigating uneven terrains or slopes. In this thesis, the design and optimization of a pushrim-activated power assisted wheelchair (PAPAW) is presented, aimed at reducing dynamic tipping probability. A small scale model PAPAW (3.5 : 1) was constructed to determine the effect of different design parameters on tipping behavior. These parameters, yielding 4 prototypes, included a modification of wheelchair dimensions, battery placement, introduction of a weighted base structure and the addition of anti tipping wheels. These prototypes were tested for static tipping angles and dynamic stability driving down curbs of 50 mm and 70mm heights, approaching the curbs at 30 , 60 and 90 degree angles. The results demonstrated that anti-tipping wheels significantly enhanced rear stability, while a heavier bottom base (lower center of gravity) improved front stability. However, minor alterations in dimensions as well as battery placement did not record a measurable difference in tipping probability. Thus, this thesis concludes that the combination of anti tipping wheels and a lower center of mass can substantially mitigate tipping risks, offering a safer and more reliable mobility solution for power assisted wheelchair users.
| Item Type: | Thesis (Bachelor's Thesis) |
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| Supervisor name: | Wilhelm, E. |
| Degree programme: | Biomedical Engineering |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 01 Jul 2024 09:12 |
| Last Modified: | 01 Jul 2024 09:12 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/32903 |
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