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Magnesium Alloys in Aircraft Seats - Developments in Magnesium Alloy Flammability Testing

Aircraft SEAT Committee
  • Aerospace Standard
  • AIR6160A
  • Current
Published 2020-01-09 by SAE International in United States

This document provides informational background, rationale and a technical case to allow consideration of the removal of the magnesium alloy restriction in aircraft seat construction as contained in AS8049B. The foundation of this argument is flammability characterization work performed by the FAA at the William J. Hughes Technical Center (FAATC), Fire Safety Branch in Atlantic City, New Jersey, USA. The rationale and detailed testing results are presented along with flammability reports that have concluded that the use of specific types of magnesium alloys in aircraft seat construction does not increase the hazard level potential in the passenger cabin in a post-crash fire scenario. Further, the FAA has developed a lab scale test method, reference DOT/FAA/TC-13/52, to be used as a certification test, or method of compliance (MOC) to allow acceptability of the use of magnesium in the governing TSO-C127 and TSO-C39C.

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Vehicle Interior cleanliness tracker

Aptiv Components India Pvt Ltd.-Vijayalakshmi kr, Anitha Loganathan
  • Technical Paper
  • 2019-28-2466
Published 2019-11-21 by SAE International in United States
The future of mobility is being driven towards fully autonomous driving. As a result, people spend majority of the time in vehicles for chores other than driving. The focus of automotive makers shifts towards providing best-in-class passenger comfort. One of the least focused area in passenger comfort is vehicle interior cleanliness which requires periodic human intervention. An intelligent vehicle can outsmart a human by self-caring to maintain the cleanliness elements on floor, seat and roof. This paper addresses subjects like wetness, dirt and stains in the vehicle interior utilizing the capability of Interior sensing platform. An internally mounted camera in the vehicle can capture images of the interior and apply image processing techniques to identify the subjects mentioned above. The wetness on the floor mats can lead to moldy odor, corrosion, failure of the electronic components in the car. Over a period, the vehicle upholstery or seats absorb the dirt and stains and lead to foul smell. HVAC can be used for drying the interior as appropriately detected by the system. A modern system to…
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Performance Standards for Oblique Facing Passenger Seats in Transport Aircraft

Aircraft SEAT Committee
  • Aerospace Standard
  • ARP6316A
  • Current
Published 2019-11-19 by SAE International in United States

This SAE Aerospace Recommended Practice (ARP) documents a common understanding of terms, compliance issues, and occupant injury criteria to facilitate the design and certification of oblique facing passenger seat installations specific to Part 25 aircraft.

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Polyurethane Foam Performances’ Influence on Body Pressure Distribution on an Automotive Seat

Changchun Faway Adient Automotive System Co., Ltd. Technical-Yanfei Wang, Li-Feng Xing, Yu-Qiang Huang
Published 2019-11-04 by SAE International in United States
From the microstructure point of view, the relationship of car seat comforts, including the static and dynamic comfort, and the polyurethane foam performance of its cushion has been analyzed. In this paper, polyurethane cushion performances associated with the seat static comfort have been mainly discussed. And their quantizing relation is obtained. How to apply the pressure gradient, one of body pressure distribution parameters, to optimize automobile seat comfort has been analyzed in detail. The findings suggest maximum and mean values of body pressures increase by 0.09 KPa and 0.04 KPa with the cushion foam hardness (Ph) increasing 1 KPa, respectively. The pressure gradient is little dependent on the cushion foam hardness within the range of Ph=4 ~ 5 KPa. Furthermore, the foam thickness under the hip should be greater 80 mm in order to reduce subcutaneous stresses under conditions of Ph= 6.2 KPa.
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STATE OF CHARGE

Automotive Engineering: November/December 2019

Bill Visnic
  • Magazine Article
  • 19AUTP11_01
Published 2019-11-01 by SAE International in United States

With just 16 hours to complete a three-state, 600-plus-mile roundtrip, we judge whether the nation's non-Tesla fast-charging network is a match for the new breed of long-range EVs like Jaguar's inspired 2019 I-Pace.

It's a trip we've done scores of times with barely a thought. From our home near SAE International headquarters in western Pennsylvania to the metro Detroit area is approximately 300 miles (483 km) of highway driving. We often do it in four-and-a-half hours without a stop of any kind, much less for fuel. Some diesels and hybrids, and even a few conventional gasoline vehicles, can knock off the entire roundtrip on a single tankful.

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A Novel Method of Improving Ride Comfort of Two Wheeler by Optimization of Seat Parameters

Carmel Polytechnic College-Francis Augustine Joseph
Saingits College of Engineering-Arun Kottayil Varghese
Published 2019-10-11 by SAE International in United States
Two-wheeler plays a significant role in personal transportation in India. People prefer two-wheelers, which has better fuel economy, comfort, and performance. It is vital to enhance comfort, as the seat is in direct contact with the user. Better user comfort improves the vehicle feel and behavior. Dynamic comfort analysis is necessary to understand and improve the vibration characteristics of the human-seat system. The vibration characteristics under analysis are Natural frequency, Maximum transmissibility, Attenuation frequency, and Transmissibility at 6 Hz. A test set-up was developed to collect data samples with different seat characteristics. The data collected from the seat are IFD, Hysteresis, Air-Permeability, Resilience, Thickness, and Mass. The relation between the seat parameters and vibration characteristic is established by statistically analyzing the data. Best seat was identified by ranking vibration characteristics. Correlation analysis determines the best seat by subjective rating of the sample and seat vibration ranking.
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Design for Adaptive Rear Floor Carpet for Changing Shapes and Complex Architecture

Mahindra & Mahindra, Ltd.-Praveen Kumar, Ramakrishna Nimmagadda, Harshad Bornare, Nareen Kinthala
Published 2019-10-11 by SAE International in United States
With increasing road traffic and pollution, it becomes responsibility for all OEM to increase fuel efficiency and reduce carbon footprint. Most effective way to do so is to reduce weight of the vehicle and more use of ecofriendly recyclable material. With this objective we have come up with Light weight, cost effective sustainable design solution for Injection moulded RQT (Rear quarter trim). It is an interior plastic component mounted in the III row of the vehicle. This is required to ensure inside enhanced aesthetic look of the vehicle and comfort for 3rd row passengers. Conventionally RQT of vehicle with 3rd row seating is made using plastic material (PP TD 20). With the use of plastic moulded RQT there is a significant weight addition of around 6 kg per vehicle along with reduced cabin space, huge investment and development time impact.In PROJECT X model which is a 4.4 meter vehicle with 3rd row seating capacity, we have challenged the conventional way of design and have come up with “Light weight, cost effective sustainable design solution” of…
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How HMI displays impact operator productivity in industrial vehicles

SAE Truck & Off-Highway Engineering: October 2019

Markus Wallmyr, head of UX at CrossControl and a researcher with Mälardalen University, wrote this article for Truck & Off-Highway Engineering magazine.-Markus Wallmyr
  • Magazine Article
  • 19TOFHP10_11
Published 2019-10-01 by SAE International in United States

The latest research indicates that well-integrated HMI (human-machine interface) systems lead to more attentive users that better retain task-related information and stay focused for longer with less reported effort. These systems also fit into the wider development trends in off-highway machines that affect operator fatigue in day-to-day tasks.

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WHAT WE'RE DRIVING

Automotive Engineering: September 2019

  • Magazine Article
  • 19AUTP09_08
Published 2019-09-01 by SAE International in United States

As the sporting player in Volvo's C-segment sedan lineup, this all-wheel drive, turbocharged-and-supercharged R-Design S60 faces benchmark competition in the BMW 3-Series, Audi A4 and Mercedes-Benz C-Class. In pure performance, the stylish Swede stacks up nicely against the Germans: Its 316 hp (236 kW) pushes the 3,900 lb (1769 kg) car plus my 200-lb (91 kg) of dead weight from a standstill to 60 mph (97 km/h) in 5.5 s, according to my stopwatch. Dynamically, the S60 T6 (not my choice of nomenclature, as it's a 4-cyl., not a six) feels solid and secure, if not exceptionally nimble, when pushed hard in the corners.

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Gaining Approval for Seats with Integrated Electronics in Accordance with AC21-49 Option 7b

Aircraft SEAT Committee
  • Aerospace Standard
  • AIR6448A
  • Current
Published 2019-08-07 by SAE International in United States

The primary purpose of this document is to provide roles, responsibilities and accountabilities to meet AC 21-49 Section 7.b ‘Type Certification using TSO-approved seat with electronic components defined in TSO design’. This document may be applied to all applicable seat TSOs (C39(), C127()…etc). The approval for the integration of the electronics will fall, in part or in full, under the type design authority of the Seat Installer rather than the Seat Supplier shipping the integrated seat. The defined responsibilities, areas of authority and accountability of each party, as well as necessary communication protocols, must ensure configuration management, design control and quality control. These definitions, controls and protocols are agreed (thru normal commerical agreements and binding contracts) and adhered to by all parties ensuring all parts in the supply chain remain approved (e.g. certified and conformed).