Browse Topic: Maintenance, repair and overhaul (MRO)

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The Logistic Lasso and Ridge Regression Algorithm-Based Airline Passenger Satisfaction Prediction Model2025-01-716803/19/2025
Airline passenger satisfaction is important for airline operation service quality management. When airline companies carry out advertisement campaigns or plan a marketing strategy, the resources and budgets are not unlimited. Thus, an airline can only focus on improving a few factors that drive passenger satisfaction. To understand the key satisfies for the young and the old adults, respectively, we leverage five airline passenger satisfaction methods to identify the key factors that explain the airline service satisfaction of different passengers. In particular, we investigate and compare the ridge and the Lasso regularization in terms of the resulting model’s sparsity and computational efficiency. The top three important factors that influence the old’s satisfaction are departure and arrival time convenience, legroom service, and baggage handling. Our findings indicate that the young people place a higher value on entertainment, while the old adults place a higher value on usefulness
Ma, Jie, Hu, Song, Wang, Haipeng
Technical Paper
SAE TOMORROW TODAY: Launching Human Space Travel with a Luxury Balloon1349801/23/2025
Imagine a six-hour journey to outer space that includes a world-class meal, cocktail service, Wi-Fi, and unprecedented views of Earth. This experience could soon become reality. Space Perspective, the world's first carbon-neutral spaceflight experience company, is commercializing space travel with Spaceship Neptune, a pressurized capsule propelled by a giant SpaceBalloon(TM). The experience is designed to be gentle and accessible with no rockets, weightlessness, heavy g-forces, or training required. Alongside world-class meal and cocktail service, space travelers will also enjoy views through the largest windows ever flown to space, Wi-Fi, and a proper restroom. To learn more, we sat down with Taber MacCallum, Founder and Chief Technology Officer, Space Perspective, to discuss the technical development of the SpaceBalloon(TM) and how the company is unlocking the market for space travel in a new and innovative way. We'd love to hear from you. Share your comments, questions and ideas for
Hineman, Marcie
Podcast
Army Completes Satellite as a Managed Service Research ProjectTBMG-5213312/01/2024
Intelsat McLean, VA melissa.longo@intelsat.com
Magazine Article
Cable Carriers Promote Efficiency in an Autonomous Hospitality RobotTBMG-5218712/01/2024
Since the COVID-19 pandemic that advanced contactless service, robots are increasingly being seen conducting routine deliveries around hospitals and hotels. Developed by Robotise Technologies, JEEVES is one such autonomous service robot used in hotels, healthcare facilities, offices, airports, and other settings. Its main duty is to transport materials and products.
Magazine Article
Where Do EV Batteries Go When They Die?TBMG-5213812/01/2024
At Cox Automotive’s EV Battery Solutions center in Oklahoma City, the conglomerate most famous for its KBB, Autotrader, and Manheim auction brands, has become a go-to for EV battery research, repair, remanufacturing, and recycling.
Magazine Article
Bio-Ink for 3D PrintingTBMG-5218912/01/2024
Biomedical engineers have developed a “bio-ink” for 3D-printed materials that could serve as scaffolds for growing human tissues to repair or replace damaged ones in the body. Bioengineered tissues show promise in regenerative, precision, and personalized medicine; product development; and basic research, especially with the advent of 3D printing of biomaterials that could serve as scaffolds or temporary structures to grow tissues.
Magazine Article
Damage Tolerant Fracture Assessment of Cracks in Non-Standard Geometries Under Static and Fatigue Loading2024-26-027601/16/2024
Cracks on metallic components may appear due to manufacturing, handling, installation, repair, welding etc. and are controlled by quality documents. However, if cracks violate the limit defined in quality document, then either parts will be scraped or will need additional evaluation through detailed and specialized Linear Elastic Fracture Mechanics (LEFM) approach. The initial size, orientation and shape of crack, part geometry and loading highly impacts the behavior of crack growth and remaining useful life. Study has been performed to understand the effect of crack aspect ratio on stress intensity factor under different stress gradient scenario. This paper also provides the simplified methodology to address the multiple cracks in complex geometries under static and fatigue loading.
Puranik, Shashank Suresh, Pathan, Irfan, Shinde, Swapnil, Soni, Nitesh, Kindleysides, Andrew
Technical Paper
Fixed High Ground Clearance Tractor2024-26-006301/16/2024
Row-crop intercultural activities are widely affected by unavailability of manpower & seasonal nature. Current tractors with lower ground clearance are unable to access field after certain crop stage, may damage crop after growth up to 1 foot. Some limited mechanization available (self-propelled boom sprayer) are of higher cost. Cropcare activities are intensive and consistently increasing cost. A retrofit height attachment is designed and developed to ensure the tractor to enter field of crops having height up to 3 ft and perform intercultural operations with lesser investment and operating cost to utilize the unmechanized gap for business benefit. The concept is converting 2WD base tractor to high ground clearance tractor having ground clearance of 3ft and rear track of 42&44'', with modular retrofit height attachment kit with lesser change on base tractor. The kit can be removed later after Cropcare and covert back the tractor to usual 2WD base tractor. The solution is suitable for
A, Gokila, Natarajan, Saravanan, T, Vimalraj, Subbaiyan, Prasanna Balaji, RS, Vijay, Redkar, Dinesh, Gupta Sr, Vishal
Technical Paper
SAE TOMORROW TODAY: What Role Do Electric Utilities Have in the EV Space?1336811/17/2022
As demand for EVs grows, so too does the role of electric utilities. From powering the grid to ensuring the reliability of EV charging stations, the electric utility industry plays a pivotal role in accelerating EV adoption. For more than a century, Duquesne Light Company (DLC) has delivered electricity to more than 600,000 customers in the Pittsburgh region. Currently, there are more than 6,000 EVs in DLC's service territory -- and they expect that number to grow to more than 23,000 by the end of 2025. With this projected growth, DLC is not only providing reliable power, but EV information analysis and incentives like a Community Charging Program and Electric Fleet Advisory Service Program. We sat down with Sarah Olexsak, Senior Manager, Transportation Electrification, to discuss the role of electric utilities and how DLC is supporting EV adoption in Western Pennsylvania.
Hineman, Marcie
Podcast
Locking Side Pull Hoist RingTBMG-4691611/01/2022
null, null
Magazine Article
Automotive Diagnostics: Threat or a boon for cybersecurity2022-01-013903/29/2022
The Automotive industry went through a revolution of all sorts with the addition of a lot of electronic components in the vehicles subsequently increasing dependency on the software that these components carried on them. With large number of vehicles sold out in 90’s the service stations became burdened with providing quick and efficient service, and the competing OEMs lead to advancement of the way production and servicing of the vehicles were handled. As in any complex system where diverse components interact with each other the problems of such interactions multiplied causing diagnostics to become lean and efficient so that they can be diagnosed and fixed quickly. These diagnostics resulted in many open interfaces which could control mechanical parts without the intervention of driver with the help of a diagnostic tester. These open interfaces allowed hackers to exploit them for malicious purposes thus triggering cybersecurity protocols to be pulled in for these interfaces during
Prakash, Vignesh
Technical Paper
Multi-Dimensional CFD Studies of Oil Drawdown in an I4 Engine2022-01-047303/29/2022
A computational study based on unsteady Reynolds Averaged Navier Stokes that resolves the gas-liquid interface was performed to examine the unsteady multiphase flow in a 4 cylinder Inline (I-4) engine. In this study, the rotating motion of the crankshaft and reciprocating motion of the pistons were accounted for to accurately predict the oil distribution in various parts of the engine. Three rotational speeds of the crankshaft have been examined: 1000, 2800, and 4000 RPM. Of particular interest is to examine the mechanisms governing the process of oil drawdown from the engine head into the case. The oil distributions in other parts of the engine have also been investigated to understand the overall crankcase breathing process. Results obtained show the drawdown of oil from the head into the case to be strongly dependent on the venting strategy for the foul air going out of the engine through the PCV system. Results also show the dynamic holdup of oil in the steady operation to be
Pandey, Ashutosh, Schlautman, Jeff, Nichani, Varun
Technical Paper
ANALYSIS OF THE CURRENT TRENDS IN DEVELOPMENT ACCELERATED TESTING 2022-01-024003/29/2022
Analysis of the Current Trends in Development Accelerated Testing In 2020 ELSEVIER published author's book "Trends in Development Accelerated Testing for Automotive and Aerospace Engineering". As featured on CNN, Forbes, and Inc - BookAuthority, identifies and rates the best books in the Word based on recommendations by thought leaders and experts, this book made it to BookAuthority's best aerospace Engineering books (#43) and best Automotive Engineering books (#14) of all times (see "100 Best Aerospace Engineering Books of All Times" and "52 Best Automotive Engineering Books of All Times"). This paper will discuss the continuation - trends in development accelerated testing as result of the analysis current situation (2019 - 2021) on examples of automotive and aerospace areas. As was mentioned in the previous author's publications, the technical progress of product's testing is moving much slowly, then the technical progress in design, manufacturing, and service areas of the product
Klyatis, Lev
Technical Paper
Field Safety Performance of Micro-mobility Devices2022-01-103103/29/2022
Micro-mobility devices, such as E-scooters and E-bikes, have become a prominent mode of transportation in urban environments. Even in a single location, a variety of suppliers, each with a different design, may be available for use. When new, the safety performance of the devices should be consistent for a given make, however, over time, braking performance may diminish. Acceleration characteristics may vary between suppliers, and could diminish over the life of the device, or possibly be dependent on the current state of charge of the device. Since the rider does not own or maintain the device, they would have limited understanding of the performance of a particular device in emergency conditions. A sample of publicly available E-scooters and E-bikes were tested to determine whether differences in acceleration and hard braking capabilities may be expected. The condition of the device tires and controls, and the battery state of charge, were inspected and documented. The findings are
Larson, Robert, Kuzel, Michael
Technical Paper
SAE TOMORROW TODAY: Los Angeles World Airports Innovating the Passenger Experience1315307/08/2021
The airline industry is gradually emerging from a devastating hit as the world rebounds from the shut downs caused by COVID-19. On the path back to "normal," digitization, innovation and sustainability are transforming the travel experience. Justin Erbacci, CEO, Los Angeles World Airports, is doing his part to revolutionize the airport experience through biometrics, food and beverage delivery to the gate, and FlyAway bus service at @LAXAirport - and that's just the beginning! Tune in to hear how Erbacci and his team are propelling LAX into the future and setting the tone in the industry.
Hineman, Marcie
Podcast
Polishing Compound, Aircraft MetalAMS1650D (Current)05/06/2021
This specification covers a polishing compound for aircraft metals in the form of a liquid or paste.
AMS J Aircraft Maintenance Chemicals and Materials Committee
Material Specification
SAE TOMORROW TODAY: The Goodyear Tire & Rubber Company Rolls Forward with the Future of Mobility1301305/04/2021
Not just your grandfather's tire company, Goodyear is now shaping how people move in the future. On this episode, Erin Spring, Senior Director, New Ventures at The Goodyear Tire & Rubber Company, shares how the company is leading the way in predictive vehicle servicing to keep car and trucks safer, serviced and ready to GO!
Hineman, Marcie
Podcast
Digital Data Standards in Aircraft Asset Lifecycle: Current Status and Future Needs2021-01-003503/02/2021
The aerospace ecosystem is a complex system of systems comprising of many stakeholders in exchanging technical, design, development, certification, operational, and maintenance data across the different lifecycle stages of an aircraft from concept, engineering, manufacturing, operations, and maintenance to its disposal. Many standards have been developed to standardize and improve the effectiveness, efficiency, and security of the data transfer processes in the aerospace ecosystem. There are still challenges in data transfer due to the lack of standards in certain areas and lack of awareness and implementation of some standards. G-31 standards committee of SAE International has conducted a study on the available digital data standards in aircraft asset life cycle to understand the current and future landscapes of the needed digital data standards and identify gaps. This technical paper presents the study conducted by the G-31 technical committee. This paper reviews the data being
Kumar, G. V. V. Ravi, Jones, Ken, Rencher, Robert, Rajamani, Ravi, Schmidt, Michael, Budeanu, Dragos, Ghimire, Ritesh, Lesmerises, Alan, Kasimsetty, Vinay, Kar, Satyanarayan, Hall, Frederick, Berlee, Dirk, Walthall, Rhonda, Johnson, Logen
Journal Article
Cable Marking for Circuit Identification in Multi-Voltage Power Distribution SystemsJ3176_202101 (Current)01/13/2021
This SAE Standard establishes the minimum circuit identification and requirements for Multi-Voltage Power Distribution Systems (MVPDS) for use on trucks and buses. A Multi-Voltage Power Distribution System is one that distributes two or three voltages, up to 60 VDC, to power the controls, instruments, and devices.
Truck and Bus Electrical Systems Committee
Technical Standard
Will Travel Ever Be the Same Again: Exploring the Post-COVID World1292012/10/2020
What's next after the pandemic? Many industries have been asking that question and during SAE's Roundtable Series on the impacts of COVID-19 some companies are searching for the answer. This week we were joined by guest co-hosts, Dr. Sven Beiker, External Advisor at SAE International, and Sven Taubert, Head of Corporate Foresight & Market Intelligence at Lufthansa Technik, to discuss their SAE roundtable conversation and look at ways that can continue to support members as they tackle the challenges of tomorrow. Sven Taubert shared his perspective on what it means to plan for a pandemic as an airline and addressed the pressing question, "Will travel ever be the same?" Discover why Lufthansa Technik is in the business of trust and what consolidations are on the horizon for the aviation industry in response to the global pandemic.
Hineman, Marcie
Podcast
SAE TOMORROW TODAY: Safety at the Forefront of Mobility1291210/22/2020
Jennifer Morrison, Manager of Vehicle Safety Compliance, Mazda North America joins host Grayson Brulte on SAE Tomorrow Today to discuss all of the facets of safety in the world of mobility. Jennifer kicks things off by recounting her emotional experiences investigating highway crashes while at the National Transportation Safety Board. She then digs into why safety must be a foundational element for every mobility company, the importance of standardizing safety features in vehicles, training dealers to inform car buyers on proper usage of safety features, how schools and groups can educate themselves on their transportation service providers, and how autonomous mobility will shift our future driving habits.
Hineman, Marcie
Podcast
Oxygen System and Component CleaningARP1176B (Current)10/19/2020
This SAE Aerospace Recommended Practice (ARP) provides recommended practices for the cleaning of aircraft oxygen equipment, both metallic and non-metallic articles, such as oxygen lines (tubes, hoses, etc.), components (including regulator and valve parts), cylinders, and ground-based equipment that may be used to support aircraft oxygen systems. This document also specifies work area details, methods for selecting suitable cleaning agents, cleaning methods, and test methods for verifying levels of cleanliness. The cleanliness coding scheme specified in this document provides a method for documenting minimum cleanliness level requirements and for identifying compliance.
A-10 Aircraft Oxygen Equipment Committee
Recommended Practice
Oxygen System and Component CleaningARP1176B-TEST-REC (Historical)10/19/2020
This SAE Aerospace Recommended Practice (ARP) provides recommended practices for the cleaning of aircraft oxygen equipment, both metallic and non-metallic articles, such as oxygen lines (tubes, hoses, etc.), components (including regulator and valve parts), cylinders, and ground-based equipment that may be used to support aircraft oxygen systems. This document also specifies work area details, methods for selecting suitable cleaning agents, cleaning methods, and test methods for verifying levels of cleanliness. The cleanliness coding scheme specified in this document provides a method for documenting minimum cleanliness level requirements and for identifying compliance.
A-10 Aircraft Oxygen Equipment Committee
Recommended Practice
SAE TOMORROW TODAY: One Day Kids Will Play in the Streets Again1290709/17/2020
What will cities look like as we come out of the COVID-19 pandemic? Ashwini Chhabra, Co-Founder & Principal of Electric Avenue, joins us this week to offer his take on how trends that have emerged during the shutdown can, and likely will, transfer as cities begin to open back up. First, we talk about Ashwini's background that has transitioned from the financial service sector to the New York City education system to the urban transportation space, and how he has applied private sector thinking to public sector problems. With Ashwini's background in education, the conversation looks at how schools in New York are taking advantage of available outside space and how prioritizing public space will play an important role in city planning. Ashwini discusses the importance of planning ahead to move people around in the ways they need to properly function the city by using all forms of transportation. The New York City subway system gets a long look as well with the need to rebuild confidence
Hineman, Marcie
Podcast
SAE TOMORROW TODAY: Chipotle's Pioneering Approach to Digital1290609/11/2020
How does a quick service restaurant transform itself into a lifestyle brand? For Chipotle Mexican Grill, its all about being real and staying ahead of digital trends to create the ultimate customer experience. Nicole West, Vice President of Digital Strategy and Product for Chipotle, joins us this week to dig into the digital experience that Chipotle has pioneered within the industry. Nicole shares her experience building Chipotle's digital commerce business and how consumer adoption of digital ordering and experiences has led to digital making up 61% of company sales in Q2 2020. She discusses what trends the company saw when it developed the industry's first ordering app and how they continue to experiment with new ways to engage with customers and drive sales. As the conversation continues, Nicole explains the ways that Chipotle has innovated and disrupted the industry when appropriate, including its ordering app, Chipotlanes, Digital Kitchen, packaging, walk-up contactless pickups
Hineman, Marcie
Podcast
ELECTRONIC DISTRIBUTION OF SOFTWARE BY CRATE (EDS CRATE)ARINC827-1 (Current)08/10/2020
This standard describes the format for electronic distribution of aircraft software parts and other contents between aerospace business partners using a digital container referred to as an EDS crate. This EDS standard is intended to promote consistent, secure distribution of EDS content to any appropriate destination.
Avionics Maintenance Committee
Information Report
AVIONICS APPLICATION SOFTWARE STANDARD INTERFACE PART 1 REQUIRED SERVICESARINC653P1-5 (Current)12/23/2019
This standard defines a general-purpose Application/Executive (APEX) software interface between the Operating System of an avionics computer and the application software. The interface requirements between the application software and operating system services are defined in a manner that enables the application software to control the scheduling, communication, and status of internal processing elements. Supplement 5 adds multicore processor service capabilities.
Airlines Electronic Engineering Committee
Specification
REPAIR SLEEVE, LARGE WIRE/CABLE INSULATION DAMAGE, ELECTRIC, PERMANENT, ENVIRONMENT RESISTANT, 260 °C MAXIMUM OPERATING TEMPERATURE, TYPE IIAS6224/2 (Current)11/11/2019
AE-8C2 Terminating Devices and Tooling Committee
Technical Standard
2019 'Create the Future' Sustainable Technologies Category Winner: Wave-Powered Water DesalinationTBMG-3544911/01/2019
Magazine Article
Uniform Reference and Dimensional Guidelines for Collision RepairJ1828_201910 (Current)10/28/2019
This SAE Recommended Practice defines, for vehicle manufacturers and collision information and equipment providers, the types of vehicle dimensional data needed by the collision repair industry and aftermarket equipment modifiers to properly perform high-quality repairs to damaged vehicles. Both bodyframe and unitized vehicles, including passenger cars and light trucks, are addressed.
Motor Vehicle Council
Recommended Practice
New-Vehicle Collision Repair InformationJ2376_201910 (Current)10/28/2019
This SAE Recommended Practice defines the various types of information required by the collision repair industry to properly restore light-duty, highway vehicles to their pre-accident condition. Procedures and specifications are defined for damage-related repairs to body, mechanical, electrical, steering, suspension, and safety systems. The distribution method and publication timeliness are also considered.
Motor Vehicle Council
Recommended Practice
OEM Plastic Parts RepairJ1573_201910 (Current)10/24/2019
This SAE Recommended Practice defines the information required to repair the various types of plastics found on modern light-duty highway vehicles. Information is included for the repair and refinishing of most plastic body parts, both interior and exterior. Repair information is described for all commonly used plastics including, but not limited to, polyurethanes, polycarbonate blends, modified polypropylenes, polyethylenes and nylons. Repairs can be made to these types of plastics using two-part (2K) repair adhesives, plastic welding, and other materials available from body shop suppliers. When a new type of plastic is being introduced to the market through a new vehicle program, specific repair and refinishing procedures should be provided, following the format in this document. Sheet-molded compounds (SMC), fiber-reinforced plastics (FRP) and carbon fiber reinforced plastics can also be repaired using slightly different procedures and repair materials.
Motor Vehicle Council
Recommended Practice
FIBER OPTIC INSTALLATION AND MAINTENANCEARINC806-6 (Current)09/04/2019
This document defines recommended general practices for the maintenance and restoration of fiber optic systems. It is the intention of this document to outline proven practices and general standards of workmanship for technicians engaged in fiber optic maintenance and repair.
Airlines Electronic Engineering Committee
Information Report
3D Optical ScannerTBMG-3511609/01/2019
NVision, Inc. Southlake, TX 817-416-8006
Magazine Article
AIRCRAFT SOFTWARE COMMON CONFIGURATION REPORTINGARINC843-1 (Current)08/13/2019
This standard defines a common configuration report format that can be retrieved from an aircraft for use by ground tools and maintenance personnel. Reports will be generated in Extensible Markup Language (XML) format and structured as defined by this document. Several optional elements and attributes are defined to allow flexibility for a given report. This standard provides aircraft manufacturers, regulatory agencies, and airlines a format standard for aircraft configuration reporting, and facilitates automated comparison of configuration data reports (e.g., authorized versus as flying, etc.).
Airlines Electronic Engineering Committee
Specification
Isolation and Corrosion Protection of Dissimilar Materials, Carbon Composite Structure RepairARP4118B (Current)07/09/2019
This SAE Aerospace Recommended Practice (ARP) provides methods and guidelines for isolating dissimilar repair patch materials from carbon fiber reinforced plastic (herein also referred to as carbon composite) structure during a repair operation.
AMS G9 Aerospace Sealing Committee
Recommended Practice
Mitsubishi Heavy Industries will acquire Bombardier’s regional jet programSAE-MA-0355306/26/2019
Under the definitive agreement – signed at Le Bourget during the 53rd International Paris Air Show – MHI will acquire maintenance, support, refurbishment, marketing, and sales activities for all Canadair Regional Jet (CRJ) family of aircraft.
Kucinski, William
Magazine Article
OBSOLESCENCE MANAGEMENT STRATEGIES FOR COMMERCIAL AIRCRAFTARINC662-1 (Current)05/14/2019
The purpose of this document is to establish guidelines that should be observed during initial design, production, and maintenance of aircraft components, and to present short-term and long-term strategies to minimize the costs and impacts associated with decreasing availability of components.
Avionics Maintenance Committee
Information Report
Landing Gear Common RepairAIR5885A (Current)04/11/2019
This document outlines the most common repairs used on landing gear components. It is not the intention of this AIR to replace overhaul/component maintenance or technical order manuals, but it can serve as a guide into their preparation. Refer to the applicable component drawings and specifications for surface finish, thickness, and repair processing requirements. This document may also be used as a guide to develop an MRB (Material Review Board) plan. The repairs in this document apply to components made of metallic alloys. These repairs are intended for new manufactured components and overhauled components, including original equipment manufacturer (OEM)/depot and in-service repairs. The extent of repair allowed for new components as opposed to in-service components is left to the cognizant engineering authorities. Reference could be made to this document when justifying repairs on landing gears. For repairs outside the scope of this document, a detailed justification is necessary
A-5B Gears, Struts and Couplings Committee
Information Report
Off-Road Rim Maintenance Procedures and Service Precautions Diameter Code 20 and LargerJ1337_201902 (Current)02/21/2019
This SAE Recommended Practice covers the important fundamental maintenance and service precautions for all off-road single-piece and multi-piece rims. Detailed information on specific procedures concerning mounting, demounting, maintenance, and service of a particular type, style, or design of off-road rim assembly can be obtained by consulting rim or tire manufacturers or distributors. These procedures and service precautions should be considered in preparation of the machine service manual, the operator's manual, and workplace procedures.
MTC8, Tire and Rim
Recommended Practice
MOMENTUM: FEBRUARY 201919MOMP0202/01/2019
Battling the elements Cold Canadian winds can't stop University of Manitoba team from reaching SAE Aero Design heights. How to lead a team Virginia Tech engineering student discovers leadership skills she didn't know she had. 'Hard work, determination, and a little bit of luck' A complete vehicle overhaul helped the SAE Supermile-age team from Northern Illinois University score a second-place overall fin-ish at the 2018 competition.
Magazine
FIBER OPTIC TRAINING REQUIREMENTSARINC807-4 (Current)01/10/2019
This document is based upon the SAE ARP5602 document, A Guideline for Aerospace Platform Fiber Optic Training and Awareness Education. ARINC Report 807: Fiber Optic Training Requirements is a subset of the SAE ARP5602 document designed to meet the requirements of the commercial air transport industry. Certification to the SAE ARP5602 document fulfills the requirements of ARINC Report 807. This document defines recommended general practices for training requirements of aerospace fiber optic systems. It is the intention of this document to outline proven training practices and general standards of workmanship for technicians engaged in aerospace fiber optic manufacturing, installation, maintenance, and repair for the air transport industry. It is also recommended that management and purchasing personnel receive fundamental training to familiarize themselves with the requirements of aerospace fiber optics.
Airlines Electronic Engineering Committee
Information Report
Nano-Additives Increase the Service Life of ConcreteTBMG-3321011/01/2018
A new method increases the service life of concrete structures by reducing the infiltration rates of deleterious ions. The key is a nano-sized additive that slows down penetration of chloride and sulfate ions from road salt, seawater, and soils into the concrete.
Magazine Article
Unique Lift System Enables Installation and Servicing of Large Telescope MirrorsTBMG-3308110/01/2018
The Large Synoptic Survey Telescope (LSST), under construction atop 8,737-foot El Peñón peak in northern Chile, is a partnership project of the National Science Foundation (NSF) and the Department of Energy (DOE). The goal of the LSST, scheduled to be fully operational in 2022, is to conduct a ten-year survey that will deliver a 200-petabyte set of images and data addressing some of the most pressing questions about the structure and evolution of the universe and the objects within it. The LSST will conduct a deep survey over an enormous area of sky and do it with a frequency that enables images of every part of the visible sky to be obtained every few nights. This mode will continue for ten years to achieve astronomical catalogs thousands of times larger than have been previously compiled.
Magazine Article
Inflator Assembly and Gage Elements, Pneumatic Pressure, Remote Control, Direct ReadingAS85352A (Current)04/09/2018
This specification covers a direct reading, remote control, pneumatic pressure inflator assembly, for use on aircraft tires and struts having pneumatic pressure requirements up to 600 psi. It includes pressure relief provisions to provide for safe inflation. Also included are dual chuck stem gages for measuring tire pressure.
A-5 Aerospace Landing Gear Systems Committee
Technical Standard
Pre-Shaping Bursty Transmissions under IEEE802.1Q as a Simple and Efficient QoS Mechanism2018-01-075604/03/2018
The automotive industry is swiftly moving toward Ethernet as the high-speed communication network for in-vehicle communication. There is nonetheless a need for protocols that go beyond what standard Ethernet has to offer in order to provide additional quality of service (QoS) to demanding applications such as advanced driver-assistance systems (ADAS) or audio/video streaming. The main protocols currently considered for that purpose are IEEE802.1Q, audio video bridging (AVB) with the credit-based shaper (CBS) mechanism (IEEE802.1Qav), and time-sensitive networking (TSN) with its time-aware shaper (TAS) (IEEE802.1Qbv). AVB/CBS and TSN/TAS both provide efficient QoS mechanisms, and they can be used in a combined manner, which offers many possibilities to the designer. Their use however requires dedicated hardware and software components and clock synchronization in the case of TAS. Previous studies have also shown that the efficiency of these protocols depends much on the application at
Villanueva, Josetxo, Migge, Jorn, Boyer, Marc, Navet, Nicolas
Journal Article
An Integrated Approach to Constitutive Modeling and Life Prediction for Automotive Materials2018-01-121304/03/2018
An integrated approach of constitutive modeling and life prediction is presented through introduction of the integrated creep-fatigue theory (ICFT). The ICFT is formulated based on participating deformation and damage mechanisms, which not only describes the cyclic deformation behavior but also the life and fracture mode. Automotive exhaust system materials such as ductile cast iron and austenitic cast steel are used as example materials for demonstration in good agreement with experimental results and metallurgical examinations. This enlightens the understanding of the roles each mechanism plays in low-cycle fatigue (LCF) and thermomechanical (TMF) processes, thus helping material and component design specifically targeting the most damaging mechanism(s) encountered in service.
Wu, Xijia
Journal Article
Method and Associated Apparatus for Capturing, Servicing, and De-Orbiting Earth Satellites Using RoboticsTBMG-2872704/01/2018
Engineers at Goddard Space Flight Center have overcome limitations plaguing the satellite sector since its inception through the development of a robotic system allowing for the autonomous capture and servicing of in-orbit satellites. By enabling spacecraft to identify, pursue, and attach to a target satellite, this innovation will make possible satellite inspection, repairing, refueling, and upgrading. The major benefits provided by this technology will be of great interest to the commercial satellite sector.
Magazine Article
System Enables Robots to Understand Contextual CommandsTBMG-2817101/01/2018
Today’s robots can accomplish many repetitive tasks, but their inability to understand the nuances of human language makes them mostly useless for more complicated requests. For example, if a specific tool is placed in a toolbox and a robot is asked to “pick it up,” it would be completely lost. Picking it up means being able to see and identify objects, understand commands, recognize that the “it” in question is the tool, go back in time to remember the moment when the tool was put down, and distinguish that tool from other ones of similar shapes and sizes.
Magazine Article
Algorithm Repairs Corrupted Digital Images in One StepTBMG-2815701/01/2018
From phone camera snapshots to life-saving medical scans, digital images play an important role in the way humans communicate information. But digital images are subject to a range of imperfections such as blurriness, grainy noise, missing pixels, and color corruption.
Magazine Article
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