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Viewing 1 to 30 of 26803
2017-12-01
Book
Ravi Rajamani
The environmental impact of hydrocarbon-burning aircraft is one of the main motivations for the move to electric propulsion in aerospace. Also, cars, buses, and trucks are incorporating electric or hybrid-electric propulsion systems, reducing the pressure on hydrocarbons and lowering the costs of electrical components. The economies of scale necessitated by the automotive industry will help contain costs in the aviation sector as well. The use of electric propulsion in airplanes is not a new phenomenon. However, it is only recently that it has taken off in a concrete manner with a viable commercial future. The Electric Flight Technology: Unfolding of a New Future reviews the history of this field, discusses the key underlying technologies, and describes how the future for these technologies will likely unfold, distinguishing between all-electric (AE) and hybrid-electric (HE) architectures. Written by Dr.
2017-11-15
WIP Standard
AIR1662B
This SAE Aerospace Information Report (AIR) provides background information, technical data and related technical references for minimization of electrostatic hazards in aircraft fuel systems. Techniques used to minimize the electrostatic hazard include: a. Reducing fueling rate into tank bays including use of multiple refueling inlet nozzles. b. Reducing refuel plumbingn flow velocities. c. Introducing fuel into the tank at a low velocity near the bottom and directing it to impinge upon a grounded conducting surface. d. Avoiding electrically isolated conductors in the fuel tank. e. Using conductivity additives in the fuel.
CURRENT
2017-11-15
Standard
AS6324
AS6324 specifies the requirements for comparative testing of new copper and copper alloy conductors to AS29606 qualified conductors. AS29606 approved conductors are used for the construction of insulated wire defined in SAE Aerospace wire standards (i.e., AS22759, AS81044, etc.). AS6324 defines testing which meets or exceeds the minimum test requirements of AS29606 and AS22759 and its detailed specification sheets.
2017-11-15
Journal Article
2017-32-0119
Akira Iijima, Takuya Izako, Takahiro Ishikawa, Takahiro Yamashita, Shuhei Takahata, Hiroki Kudo, Kento Shimizu, Mitsuaki Tanabe, Hideo Shoji
Engine knock is the one of the main issues to be addressed in developing high-efficiency spark-ignition (SI) engines. In order to improve the thermal efficiency of SI engines, it is necessary to develop effective means of suppressing knock. For that purpose, it is necessary to clarify the mechanism generating pressure waves in the end-gas region. This study examined the mechanism producing pressure waves in the end-gas autoignition process during SI engine knock by using an optically accessible engine. Occurrence of local autoignition and its development process to the generation of pressures waves were analyzed under several levels of knock intensity. The results made the following points clear. It was observed that end-gas autoignition seemingly progressed in a manner resembling propagation due to the temperature distribution that naturally formed in the combustion chamber. Stronger knock tended to occur as the apparent propagation speed of autoignition increased.
2017-11-15
WIP Standard
J1939DA
This document is intended to supplement the J1939 documents by offering the J1939 information in a form that can be sorted and search for easier use.
2017-11-14
WIP Standard
J3162
Document industry's agreement with CARB for the collection of monitor ratios as required by 13 CCR 1971.1 (l)(2.2.3). Describe key features of of the data collection process and identity the repository for the completed means. Document examples of the data collected for submission to CARB in compliance to (l)(2.2.3). [Note: The means was developed under a contract administered by ETI, Inc. on industry's behalf and funded by industry. The means is wholly owned by ETI, who agrees to the use of the results for this purpose. No SAE resources were used in the development of the design or the embodiment of the means. The embodiment consists of a software detailed design and Java software housed in a Github repository using the MIT software licensing model].
CURRENT
2017-11-14
Standard
ARP4005C
This SAE Aerospace Recommended Practice (ARP) provides information to guide in the selection of electromechanical relays to be used in electrical/electronic circuits for application in aerospace, ground, and shipboard systems to achieve proper performance.
2017-11-13
Article
Navistar president and CEO Troy Clarke recently signaled an acceleration of new product offerings and integrations stemming from its partnership with Volkswagen Truck & Bus. Chief among these activities is to converge the two companies’ connectivity activities and to develop an electric-powered, medium-duty vehicle for the U.S. by late 2019 or early 2020.
2017-11-13
Article
ITT Cannon's CTC series is a simple-to-install, low-maintenance cable-to-cable interconnect solution.
2017-11-13
Article
CIT Relay & Switch, a division of Circuit Interruption Technology, Inc., offers 16-amp UL-approved anti-vandal pushbutton switches in 25 mm, 28 mm or 30 mm (0.984 in, 1.10 in or 1.18 in) sizes.
2017-11-13
Article
Inclination measurement in mobile machines is exposed to motion, shock and vibration.
2017-11-13
Tech Insights
TI-0002
While all-electric aircraft remain at the bleeding edge of the aviation industry, incorporating technologies like proton exchange membrane fuel cells into existing aircraft can result in considerable auxiliary capability with low environmental impact. However, proper consideration must be given to supporting systems to achieve a reliable balance of plant-especially when those systems interface with existing aircraft architectures. The scope of the BoP is to manage and condition the reactant flows to and from the fuel-cell module and to provide power to system components.
2017-11-13
WIP Standard
AIR6514A
This interface control document (ICD) specifies all software services in the Unmanned Systems (UxS) Control Segment Architecture, including interfaces, messages, and data model.
2017-11-13
WIP Standard
AS5259/6B
Not available.
2017-11-13
WIP Standard
AS6522A
The UCS technical governance comprises a set of policies, processes, and standard definitions to establish consistency and quality in the development of architecture artifacts and documents. It provides guidance for the use of adopted industry standards and modeling conventions in the use of Unified Modeling Language (UML) and Service Oriented Architecture Modeling Language (SoaML), including where the UCS Architecture deviates from normal UML conventions. This document identifies the defining policies, guidelines, and standards of technical governance in the following subjects: - Industry standards adopted by the AS-4UCS Technical Committee: These are the industry standards and specifications adopted by AS-4UCS in the generation and documentation of the architecture. - UCS Architecture Development: UCS specific policies on the development of the UCS Architecture. The AS-4UCS Technical Committee governance policies are intentionally minimal.
2017-11-12
WIP Standard
J1699/3
The main purpose of this Recommended Practice is to verify that vehicles are capable of communicating a minimum subset of information, in accordance with the diagnostic test services specified in SAE J1979: E/E Diagnostic Test Modes, or the equivalent document ISO 15031-5: Communication Between Vehicle and External Equipment for Emissions-Related Diagnostics – Part 5: Emissions-related diagnostic services. Any software meeting these specifications will utilize the vehicle interface that is defined in SAE J2534, Recommended Practice for Pass-Thru Vehicle Programming.
CURRENT
2017-11-09
Standard
AS81582C
This specification covers environment-resisting, quick disconnect, EMI/RFI shielded and non-shielded umbilical, electric connectors and adapter assemblies with removable crimp or nonremovable solder-type contacts and accessories. Connectors are rated for operation from -55 °C (-67 °F) to 200 °C (392 °F). Adapter assemblies are rated for operation from -55 °C (-67 °F) to 125 °C (257 °F). The upper temperature is the maximum internal hot spot temperature resulting from any combination of electrical load and ambient temperature.
CURRENT
2017-11-09
Standard
AS6009A
This document defines a set of standard application layer interfaces called JAUS Mobility Services. JAUS Services provide the means for software entities in an unmanned system or system of unmanned systems to communicate and coordinate their activities. The Mobility Services represent the vehicle platform-independent capabilities commonly found across all domains and types of unmanned systems (referred to as UxVs). At present, over 15 services are defined in this document many of which were updated in this revision to support Unmanned Underwater Vehicles (UUVs). Some examples include:
CURRENT
2017-11-08
Standard
AS85485B
This specification covers the requirements for radio frequency absorptive component wires and finished cables which function electrically as distributed low-pass filters. Materials and construction details are specified in the detail specification.
CURRENT
2017-11-08
Standard
J1113/12_201711
This SAE Standard establishes test methods for the evaluation of devices and equipment in vehicles against transient transmission by coupling via lines other than the power supply lines. The test methods demonstrates the immunity of the instrument, device, or equipment to coupled fast transient disturbances, such as those caused by switching of inductive loads, relay contact bouncing, etc. Four test methods are presented in SAE J1113-12: 1.) The capacitive coupling clamp (CCC) method 2.) The direct capacitive coupling (DCC) method 3.) The inductive coupling clamp (ICC) method 4.) The capacitive/inductive coupling (CIC) method
CURRENT
2017-11-07
Standard
J551/5_201711
This SAE Recommended Practice specifies measurement procedures and performance levels for magnetic and electric field emissions and conducted power mains emissions over the frequency range 150 kHz to 30 MHz, for vehicles incorporating electric propulsion systems, e.g., battery, hybrid, or plug-in hybrid electric vehicles. Conducted emission measurements in this document are applicable only to battery-charging systems which utilize a switching frequency above 9 kHz, are mounted on the vehicle, and whose power is transferred by metallic conductors. Conducted emission requirements apply only during charging of the batteries from AC power lines. Conducted and radiated emissions measurements of battery-charging systems that use an induction power coupling device are not covered by this document. The measurement of electromagnetic disturbances for frequencies from 30 MHz to 1000 MHz is covered in CISPR 12.
2017-11-03
WIP Standard
AS22520/48
AS22520/48 PERMITS MAINTAINERS TO HAVE A SELF-CONTAINED/ POWERED BY MULTIPLE ACTUATION OF A MOVABLE HANDLE TO CRIMP CONTACT SIZES 8 THRU 0000. THE TOOL PROVIDES AN ALTERNATIVE TO THE M22520/23-01 COMPRESSED AIR POWER TOOL. THE TOOL UTILIZES THE AS22520/23 DIE ASSEMBLIES/POSITIONERS AND PROVIDES MORE EFFICIENT FIELD MAINTENANCE SUPPORT.
2017-11-03
WIP Standard
AS39029/90C
No scope available.
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