Pressure sensing of an aircraft passenger seat with lumbar control

Campos, Gabriel H.; Xi, Fengfeng

doi:10.1016/j.apergo.2019.103006

Cited by 12 publications

(6 citation statements)

References 10 publications

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“…Recent literature shows that interface contact pressure is useful for investigating discomfort during seating [21,[27][28][29]. This study provides comprehensive insights into the effects of…”

Section: Discussionmentioning

confidence: 94%

Influences of cushion contour on passenger comfort and interface pressure in high-speed train

Lian²,

Wu³

2023

PLoS ONE

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In this paper, eight different contoured cushions (S1-S8) in two categories (flat and wrapped) were designed to study the influence of different contoured cushions on passenger comfort in high-speed trains. Meanwhile, subjective data investigation by the comfort Likert Scale questionnaire and objective physical variables collection by the body-cushion contact pressure test was carried out. In addition, one-way ANOVA and Pearson correlation analysis were performed on the subjective survey and objective test data. The results show that the cushion contours had a significant effect on the subjective evaluation of the overall comfort of the participants, in which the overall comfort below the waist of the separated wrapped cushion S8 has the highest subjective comfort score. The overall comfort of the flat-front bulge type cushion S4 and the local comfort of the thighs and the root of the thighs were rated higher than other flat types. Under the flat cushion, the effect of stature characteristics (mainly weight and hip-width) on the overall comfort subjective ratings was insignificant, and the effect on the contact pressure distribution variables was significant, but the contact pressure distribution variables were not correlated with the comfort ratings. Under the wrapped cushion, the effect of stature characteristics on the overall comfort subjective ratings and contact pressure distribution variables was significant. There were positive and negative correlations between the average peak contact pressure and average contact pressure and comfort ratings, respectively.

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Section: Discussionmentioning

confidence: 94%

Influences of cushion contour on passenger comfort and interface pressure in high-speed train

Lian²,

Wu³

2023

PLoS ONE

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“…In a review study (De Looze et al, 2003), pressure distribution appears to be the most clearly associated objective measure to seating comfort. Pressure distribution was applied in the analysis of occupant-seat interface (Zenk et al, 2006;Ciaccia and Sznelwar, 2012;Li et al, 2017;Yongxiang et al, 2019;Campos and Xi, 2020). Hartung (Hartung, 2006) describes the ideal pressure distribution, which was later used to determine the comfort seating with the lowest spine loading (Zenk et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

The role of muscle forces in neck comfort for static seating: a pilot study

Alawneh,

Rassas,

Zhong

et al. 2024

Front. Mech. Eng.

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Aircraft seats play a key role in the competition between aircraft companies seeking to differentiate themselves in terms of passengers’ inflight experience. The seat design process relies on computational and experimental methods based on subjective measures, such as comfort rating questionnaires, and objective comfort indicators of seat-occupant interaction, such as contact pressure distribution and muscle activation. Previous studies around muscle activity for seating comfort assessment have primarily focused on more active scenarios or active systems. As such, there are limited studies about the role of muscle force in normal and relaxed sitting conditions, common in aircraft settings. This paper explores the relationship between activities of the neck muscles, sternocleidomastoid, and upper trapezius, measured from human participants seated sedentarily on conventional business aircraft seats and their perceived comfort with different backrest inclinations. The results show, for normal seating without neck pillow, no significant association is found between the backrest inclination and the neck’s comfort or muscle activation. For general seating across different backrest inclinations, a positive medium correlation between muscle activation and comfort is found in upper trapezius (R = 0.5332, p = 0.0187). This work serves as a pilot study of this new approach of comfort evaluation using muscle feedback in seat designing processes and highlights the posterior’s effect to seating experience in the neck region.

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“…However, these internal biomechanical parameters cannot be directly measured in vivo . With the development of computational capability, different biomechanical models such as finite element (FE) models ( Verver et al, 2004 ; Siefert et al, 2008 ; Grujicic et al, 2009 ; Al-Dirini et al, 2016 ; Beaugonin and Borot, 2019 ), multibody modeling with ( Rasmussen et al, 2009 ; Grujicic et al, 2009 ) and without ( Campos and Xi, 2020 ; Zhong et al, 2022 ) considering musculoskeletal systems are built for seating dis/comfort assessment or seat design. To estimate the internal biomechanical parameters such as soft tissue deformation, deformable finite element (FE) human body models (HBM) are required (see a review by Savonnet et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

PIPER adult comfort: an open-source full body human body model for seating comfort assessment and its validation under static loading conditions

Liu

Beillas

Wang

2023

Front. Bioeng. Biotechnol.

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Introduction: In this paper we introduce an adult-sized FE full-body HBM for seating comfort assessments and present its validation in different static seating conditions in terms of pressure distribution and contact forces.Methods: We morphed the PIPER Child model into a male adult-sized model with the help of different target sources including his body surface scans, and spinal and pelvic bone surfaces and an open sourced full body skeleton. We also introduced soft tissue sliding under the ischial tuberosities (ITs). The initial model was adapted for seating applications with low modulus soft tissue material property and mesh refinements for buttock regions, etc. We compared the contact forces and pressure-related parameters simulated using the adult HBM with those obtained experimentally from the person whose data was used for the model development. Four seat configurations, with the seat pan angle varying from 0° to 15° and seat-to-back angle fixed at 100°, were tested.Results: The adult HBM could correctly simulate the contact forces on the backrest, seat pan, and foot support with an average error of less than 22.3 N and 15.5 N in the horizontal and vertical directions, which is small considering the body weight (785 N). In terms of contact area, peak, and mean pressure, the simulation matched well with the experiment for the seat pan. With soft tissue sliding, higher soft tissue compression was obtained in agreement with the observations from recent MRI studies.Discussion: The present adult model could be used as a reference using a morphing tool as proposed in PIPER. The model will be published openly online as part of the PIPER open-source project (www.PIPER-project.org) to facilitate its reuse and improvement as well as its specific adaptation for different applications.

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Pressure sensing of an aircraft passenger seat with lumbar control

Cited by 12 publications

References 10 publications

Influences of cushion contour on passenger comfort and interface pressure in high-speed train

Influences of cushion contour on passenger comfort and interface pressure in high-speed train

The role of muscle forces in neck comfort for static seating: a pilot study

PIPER adult comfort: an open-source full body human body model for seating comfort assessment and its validation under static loading conditions

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