Optimization of Public Seat Functions to Assure a Comfortable Sitting Posture in Diverse Conditions

Takeshi Kitamura; Takeo Kato; Koichiro Sato; Yoshiyuki Matsuoka

Optimization of Public Seat Functions to Assure a Comfortable Sitting Posture in Diverse Conditions

Takeshi Kitamura * §

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Takeo Kato §

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Koichiro Sato §

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Yoshiyuki Matsuoka §

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§ Graduate School of Science and Technology, Kelo Univ...

Optimization of Public Seat Functions to Assure a Comfortable Sitting Posture in Diverse Conditions

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Abstract

Seat functions for public seats, such as those in railway vehicles, have been designed to assure a comfortable sitting posture. However, the importance of these functions is not widely understood. Public seats are used in a variety of conditions because users have diverse physiques and sitting postures. Thus, design solutions that consider only standard conditions, physiques, and sitting postures are insufficient. The objectives of this study are 1) to clarify the relative importance of seat functions in assuring a comfortable sitting posture and 2) to optimize important seat functions in diverse conditions. First, an analytic hierarchy process (AHP) and a fuzzy analytic hierarchy process (Fuzzy AHP) clarified that the forward tilt function of the seatback and seat swing function are necessary to assume a comfortable sitting posture because they contribute to the fitness of the seatback and prevent the hip sliding force, respectively. However, there is trade-off between satisfying the fitness and preventing the hip sliding force. Second, the seat swing function with a forward tilt function was optimized. The solution is the optimal relationship between the seatback and the seat cushion angles adjusted by the seat swing function to prevent the hip sliding force considering diverse conditions and the forward tilt angles. Finally, a sensory experiment confirmed the effectiveness of the optimized design solution.

References

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Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

Takeshi Kitamura, Takeo Kato, Koichiro Sato, Yoshiyuki Matsuoka. 2013. "Optimization of Public Seat Functions to Assure a Comfortable Sitting Posture in Diverse Conditions". Global Journal of Research in Engineering - A : Mechanical & Mechanics GJRE-A Volume 13 (GJRE Volume 13 Issue 34 (A8)).

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GJRE Volume 13 Issue 34 (A8)

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Journal Specifications

Crossref Journal DOI 10.17406/gjre

Print ISSN 0975-5861

e-ISSN 2249-4596

Keywords

diverse conditions fuzzy AHP Robust Design seat design

Classification

GJRE-A Classification FOR Code: 091399

Submission ReceivedDecember 9, 2012
Peer Review Double Blind
Handling Editor
Accepted January 3, 2013
Published August 14, 2013

Version of record

v1.2

Issue date

August 14, 2013

Language

English

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Article Matrices

Total Score: 149

Country: Japan

Subject: Global Journal of Research in Engineering - A : Mechanical & Mechanics

Authors: Takeshi Kitamura, Takeo Kato, Koichiro Sato, Yoshiyuki Matsuoka (PhD/Dr. count: 0)

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Publish Date: 2013 08, Fri

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