Abstract
In this paper, new methods for ergonomic analysis of cyclist for 4-wheel recumbent seat human-powered vehicle (HPV) are performed. An ergonomic index with fundamental formulation is developed in order to determine the level of comfortness during handling of the HPV. Basic reference of sitting postures are produced from three HPVs for 20 different individuals. All the dimensions, angles and measurements are recorded. The same individuals are required to sit on the three HPV models to evaluate their comfortness and ergonomic by observing the same dimensions, angles and measurements of leg and hand postures. The data is compared with reference comfort sitting ergonomic. This study is limited to a number of individuals which are the students of a university in Malaysia with age range from 20 to 24 years old. However, the ergonomic index can be expanded for Asian people and with some improvement in the parameters, it can be used for other countries. Derivation of ergonomic index and formulation in determining the comfort level and ergonomic of HPV. Using the ergonomic index, a new improved HPV can be developed. The index is also applicable with modification on several parameters in the formulation for other countries.
Highlights
The ergonomic study for human posture always deal with workplace and workstation where people spend six to ten hours working and maintaining the same posture for long period of time [1]
The ergonomic score is 3 for all human-powered vehicle (HPV). It shows that the design of all HPVs is acceptable in terms of ergonomic because nearly to the most ergonomic value in rapid upper limb assessment (RULA) analysis
RULA only evaluate the ergonomic factors based on the design of the HPVs not the actual HPVs
Summary
The ergonomic study for human posture always deal with workplace and workstation where people spend six to ten hours working and maintaining the same posture for long period of time [1]. In performing an ergonomics studies, human variability is used as a design parameter. The term success in ergonomics is measured by improved productivity, efficiency, safety, acceptance of the resultant system design and improved quality of human life [2]. Ergonomics is useful practical science which helps us to achieve safety, security and comfort and to maintain and improve our health. The domains it covers vary significantly [3]
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