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Viewing 151 to 180 of 7257
Technical Paper
2013-09-17
Shuhei Segawa, Junich Tamura, Satoshi Suzuki, Hisao Oka, Kiichi Meguro, Yoshiji Satou
In the expansion of composite material application, it is one of the most important subjects in assembly of aircraft structure how drilling of composite/metal stack should be processed in an efficient way. This paper will show the result of development of a drill bit for CFRP/Aluminum-alloy stack by Kawasaki Heavy Industries (KHI) and Sumitomo Electric Hardmetal (SEH). In order to improve workability and economic performance, the drill bit which enables drilling CFRP/Al-alloy stack: at 1 shot; from both directions; without air blow and coolant (just usual vacuuming); was required. A best mix drill bit which has smooth multi angles edge and pointed finishing edge was produced as a result of some trials. Developed drill bit achieved required performance and contributed to large cost reduction, labor hour saving, production speed increase and work environment improvement.
Technical Paper
2013-09-17
Jonathan G. Pelham, Ip-Shing Fan, Ian Jennions, Jim McFeat
UAS (Unmanned aircraft system), widely known to the general public as drones, are comprised of two major system elements: an Unmanned Aircraft (UA) and a Ground Control Station (GCS). UAS have a high mishap rate when compared to manned aircraft. This high mishap rate is one of several barriers to the acceptance of UAS for more widespread usage. Better awareness of the UA real time as well as long term health situation may allow timely condition based maintenance. Vehicle health and usage are two parts of the same solution to improve vehicle safety and lifecycle costs. These can be worked on through the use of two related aircraft management methods, these are: IVHM (Integrated Vehicle Health Management) which combines diagnosis and prognosis methods to help manage aircraft health and maintenance, and FOQA (Flight Operations Quality Assurance) systems which are mainly used to assist in pilot skill quality assurance. However, the addition of IVHM and FOQA systems to a UA, no matter how valuable, will face tight requirements on their weight, volume, and power consumption.
Technical Paper
2013-09-17
Jonathan L. Geisheimer, David Kwapisz, Thomas Holst, Michael Hafner
Blade tip clearance is a key design parameter for gas turbine designers. This parameter is often measured during engine testing and development phases as part of design validation but has yet to be utilized during normal engine fleet operation. Although blade tip clearance measurements are often mentioned for fleet operation in the context of active clearance control, the use of blade tip clearance measurements can provide an additional benefit for engine health monitoring. This paper explores the use of blade tip clearance sensors for engine condition monitoring of hot section blades. Blade tip clearance, especially in the first stage turbine, has an impact on exhaust gas temperature. The use of tip clearance measurements can provide supplementary information to traditional EGT measurements by providing a direct measurement of wear on the blade tips. In addition, blade creep and cracking can be measured and tracked if the sensors are able to provide clearance values of individual blades.
Technical Paper
2013-09-17
Joao Pedro Pinheiro Malere, Luis Gustavo dos Santos
1 The current pressure across the entire aerospace industry to reduce operating costs and increase efficiency has arguably never been greater. Thus the need to improve parameters such as availability and reliability, and increase the tools and services associated with more efficient aircraft operations and sustainment is now paramount. Moreover, these improvements are seen by many as important factors that define the differentiation and competitiveness of not only current but also future aircraft fleets. The paper will focus on some of the opportunities for OEMs that arise from implementing Integrated Vehicle Health Management (IVHM) systems on their platforms and the challenges associated with evaluating the costs and benefits of their implementation and operation.
Technical Paper
2013-09-17
Joshua Benhabib
Manufacturing operations introduce unreliability into hardware that is not ordinarily accounted for by reliability design engineering efforts. Inspections and test procedures normally interwoven into fabrication processes are imperfect, and allow defects to escape which later result in field failures. Therefore, if the reliability that is designed and developed into an equipment/system is to be achieved, efforts must be applied during production to insure that reliability is built into the hardware. There are various ways to improve the reliability of a product. These include: Simplification Stress reduction/strength enhancement Design Improvement Using higher quality components Environmental Stress Screening before shipment Process Improvements, etc. This paper concentrates on ‘Manufacturing Process Improvement’ effort through the use of design of experiments, (DOE). Hence, improved levels of reliability can be achieved. Most applications optimize the mean value of a response variable.
Technical Paper
2013-09-17
Peter Foote
The first cross-industry guidelines for the implementation of structural health monitoring for aerospace applications have been created as a SAE International Aerospace Recommended Practices document: SAE ARP 6461 ‘Guidelines for Implementation of Structural Health Monitoring on Fixed Wing Aircraft’ [1]. These guidelines have brought together manufacturers, operators / users, systems integrators, regulators, technology providers and researchers to produce information on the integration of SHM into aircraft maintenance procedures, generic requirements and advice on validation, verification and airworthiness. The take-up of SHM in the aerospace industry has been slow, in part due to the lack of accepted industry practices surrounding not just the technology itself (sensors and sensor systems) but also the associated issues arising from the introduction of new methods into aircraft maintenance. The SHM community responded by forming an Industry Steering Committee on the topic which then became a Technical Group within the SAE International standards organization (G-11 SHM).
Technical Paper
2013-09-17
Yao Wang, Shon Grabbe
When the demand for either a region of airspace or an airport approaches or exceeds the available capacity, miles-in-trail (MIT) restrictions are the most frequently issued traffic management initiatives (TMIs) that are used to mitigate these imbalances. Miles-in-trail operations require aircraft in a traffic stream to meet a specific inter-aircraft separation in exchange for maintaining a safe and orderly flow within the stream. This stream of aircraft can be departing an airport, over a common fix, through a sector, on a specific route or arriving at an airport. This study begins by providing a high-level overview of the distribution and causes of arrival MIT restrictions for the top ten airports in the United States. This is followed by an in-depth analysis of the frequency, duration and cause of MIT restrictions impacting the Hartsfield-Jackson Atlanta International Airport (ATL) from 2009 through 2011. Then, machine-learning methods for predicting (1) situations in which MIT restrictions for ATL arrivals are implemented under low demand scenarios, and (2) days in which a large number of MIT restrictions are required to properly manage and control ATL arrivals are presented.
Technical Paper
2013-09-17
Ravi Rajamani, Abhinav Saxena, Frank Kramer, Michael Augustin, J.B. Schroeder, Kai Goebel, Ginger Shao, Indranil Roychoudhury, Wei Lin
The term Integrated Vehicle Health Management (IVHM) describes a set of capabilities that enable sustainable and safe operation of components and subsystems within aerospace platforms. However, very little guidance exists for the systems engineering aspects of design with IVHM in mind. It is probably because of this that designers have to use knowledge picked up exclusively by experience rather than by established process. This motivated a group of leading IVHM practitioners within the aerospace industry under the aegis of SAE's HM-1 technical committee to author a document that hopes to give working engineers and program managers clear guidance on all the elements of IVHM that they need to consider before designing a system. This proposed recommended practice (ARP6883 [1]) will describe all the steps of requirements generation and management as it applies to IVHM systems, and demonstrate these with a “real-world” example related to designing a landing gear system. The team hopes that this paper and presentation will help start a dialog with the larger aerospace community and that the feedback can be used to improve the ARP and subsequently the practice of IVHM from a systems engineering point-of-view.
Standard
2013-09-10
This SAE Aerospace Standard (AS) presents all appropriate boss dimensions from .125 inch to 2.0 inch tube sizes.
WIP Standard
2013-09-05
This SAE AIR provides a description of a reference method for viscosity tests of thickened (AMS 1428) anti-icing fluids.
Book
2013-09-05
Ian K. Jennions
The third volume in the Integrated Vehicle Health Management (IVHM) series focuses on the technology that actually supports the implementation of IVHM in real-life situations. Edited by Ian K. Jennions, Director of the IVHM Center at Cranfield University, UK, this book was written collaboratively by twenty-seven authors from industry, academia and governmental research agencies. Topics include: -Sensors, instrumentation and signal processing -Fault detection and diagnostics -Prognostics and metrics -Architecture -Data Management -Vehicle level reasoning systems -System's design -Applications and disruptive technologies Integrated Vehicle Heath Management: The Technology follows two bestsellers, also published by SAE International, which cover the fundamentals aspects of this new body of knowledge (Integrated Vehicle Health Management: Perspectives on an Emerging Field), and the business justification needed so that investments in the technology make sense (Integrated Vehicle Health Management: Business Case Theory and Practice).
WIP Standard
2013-09-04
This specification covers a carbon soil and paint remover compound in the form of a liquid. Primarily for removal of carbonaceous soils and paint from aircraft turbine engine parts by immersing the parts in liquid at room temperature.
WIP Standard
2013-09-04
This specification covers a strongly alkaline scale conditioner in the form of a liquid or a water-soluble powder. This product has been used typically in conditioning heat scale formed on aircraft turbine engine high-temperature alloy part by immersion in a solution of the compound at elevated temperature, but usage is not limited to such applications. These compounds are unsuitable for cleaning aluminum parts.
WIP Standard
2013-09-04
This specification covers an alkaline permanganate oxide conditioner in the form of a water-soluble powder or a liquid for dilution with water. This product has been used typically for conditioning of oxidation products on aircraft turbine engine components fabricated from steels, nickel alloys, and cobalt alloys by immersion in a solution of the cleaner at elevated temperature, but usage is not limited to such applications.
WIP Standard
2013-09-04
This specification covers an inhibited phosphoric acid in the form of a liquid concentrate or a water soluble powder for dilution with water. Primarily for derusting of aircraft turbine engine ferrous components and removal of heat scale and other contamination from the surface of nickel alloys by immersion at room temperature. Should not be used on steel parts having hardness of 40 HRC or over.
Standard
2013-09-03
This SAE Aerospace Information Report (AIR) developed by a broad cross section of personnel from the aviation industry and government agencies is offered to provide state-of-the-art information for the use of individuals and organizations designing new or upgraded turboshaft engine test facilities.
Standard
2013-08-29
This SAE Aerospace Recommended Practice (ARP) provides guidelines for the format and content of documents defining the interface between electronic propulsion control systems and aircraft systems. The scope includes civilian aircraft powered by turbofan, turboprop, and turboshaft engines equipped with electronic engine controls.
WIP Standard
2013-08-23
This Aerospace Recommended Practice (ARP) defines minimum requirements for an aircraft transport ULD to transport horses properly and safely by air, to protect the horse(s) from injuries, and to protect the aircraft from corrosion created by waste spill. The ULD is designed to accommodate one horse or several.
Standard
2013-08-21
This standard covers self-propelled off-road work machines as categorized in SAE J1116 and Agricultural Tractors as defined in ANSI/ASAE S390.
Standard
2013-08-12
This SAE Aerospace Information Report (AIR) provides descriptions of test methods for determining if an aircraft surface coating of any thickness has adverse effects on aircraft deicing/anti-icing fluids with respect to fluid holdover time performance and aerodynamic performance. Although not the primary mandate of the G-12 Aircraft Ground Deicing Committee, this document also provides descriptions of suggested test methods for evaluating aircraft surface coatings with respect to durability, hardness, weathering, aerodynamic drag, ice adhesion, ice accumulation, contact angle, and thermal conductivity. These additional tests can provide informational data for characterizing the coatings and may be useful to operators when evaluating the coatings.
Magazine
2013-08-08
Simulating off-highway hybrids With customers squeezed by fuel costs, off-highway OEMs are showing some interest in developing hybrid equipment. CAE simulation tools are needed because of lack of experience with such devices. Their functional complexity requires control system simulation throughout their lives. A hose is a hose is a hose Researchers develop a method for the precise mounting of a hydraulic hose model. Integrity sensing for safety Researchers from Purdue developed a capacitance-based method for monitoring the integrity of tires, hoses, and other polymeric products during manufacturing and throughout the useful product life.
WIP Standard
2013-08-07
This document will define the P1.6 Diagnostics Message Transport Protocol and its application with SAE J2534.
WIP Standard
2013-08-07
The TP 1.6 Diagnostics Message Transport Protocol Information Report provides technical details on the operation of the protocol. This protocol is used to transmit diagnostics and ECU programming data from an off board tool to a vehicle.
Standard
2013-08-06
This SAE Aerospace Standard (AS), identical to ISO 14186, specifies the minimum design and performance criteria and testing methods of fire containment covers (FCCs) used either: a. in those cargo compartments of civil transport aircraft where they constitute one means of complying with applicable airworthiness regulations, or b. on a voluntary basis, when deemed appropriate by operators to improve fire protection in aircraft cargo compartments where airworthiness regulations do not mandate their use.
Article
2013-08-05
Donaldson Company, Inc., a worldwide manufacturer of air and liquid filtration systems and replacement parts for engines, is expanding test laboratories at its Bloomington, MN, corporate headquarters. 
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