Integration of Triz, morphological chart, and pugh matrix for redesigning ergonomics of car interior for the mobility-impaired
Individuals with disabilities in Malaysia are among the most vulnerable of the minority group in the Malaysian population. According to the World Health Organization (WHO), 15% of the world’s populations has some form of disability. According to Jabatan Kebajikan Masyarakat Malaysia (JKM), the nu...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2021
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/104017/1/SALAMI%20BAHARIAH%20BINTI%20SULIANO%20-%20IR.pdf |
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| Summary: | Individuals with disabilities in Malaysia are among the most vulnerable of the
minority group in the Malaysian population. According to the World Health
Organization (WHO), 15% of the world’s populations has some form of disability.
According to Jabatan Kebajikan Masyarakat Malaysia (JKM), the number of
registered disabled people is increasing, as recorded by their annual statistics.
With a projected rise in the number, the number of referred groups that use the
road also increases over time. Besides, they are the majority of those who have
relied on private cars for their versatility. Adjustments and modifications in
vehicle configuration are connected in some parts to the physical ailments
frequently confronted by them. With incongruous design today in the market,
disabled people faced difficulties to itinerant, as doing so contributed to the
diminishing of physical and emotional impact on them. The objective of this
research is to redesign an ergonomics interior of a car for the mobility-impaired
using the Theory of Inventive Problem Solving (TRIZ), specifically function
analysis, cause and effect analysis, and contradiction matrix. This redesign
focuses on the driver’s area of a compact car drove by upper limb disabled
drivers, lower limb disabled drivers, or combined limb disabled drivers. Analysis
from a set of questionnaires was conducted to list down the most sought-after
needs of the mobility-impaired person for satisfaction of their ergonomics. It was
then followed by a hybrid of TRIZ, Morphological charts, and Pugh Matrix to
direct the solution and choices of design for the redesign. Redesigned parts
initiated with a verification study of ergonomics impact towards the manikin. The
results of the questionnaire have identified eight not-ergonomics parts in
percentage scored by respondents handle door (53.3%), handle headliner
(53.3%), door (53.3%), upholstery back (53.3%), upholstery bottom (53.3%),
steering (53.3%), gear knob (56.7%), and pedals (53.3%). Accordingly, the
aforementioned parts are subjected to TRIZ solution method, which results in the
eight proposed Inventive Principles. At the end of the study, a model of an ergonomically redesigned car interior for mobility impaired people was
developed to address mobility and exclusion issues, allowing them to improve
their daily activities. A simulation in CATIA on design verification comparing
current design and redesigned parts show virtuous scores of 1 and 2 for RULA
and within guidelines range for Biomechanics Single Action Analysis. The postquestionnaire
results show that product redesign has a positive impact on the
listed part. Therefore, this research demonstrated the necessity of redesigning
car interior and improving ergonomic features extensively, specifically for limbdisabled
drivers. |
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