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Technical Paper

Panel and Back

1980-04-01
800624
The business jet industry is in the midst of a prolific avionics revolution which, if not properly integrated, will soon result in a semi-crisis of having used up all the panel space, all black box space, lowered reliability, and increased weight. It can be alleviated if our industry joins together to plan for its advent.
Technical Paper

Application of Reliability to a Naval Weapon System

1970-02-01
700612
The LHA Ship is the first application of Reliability at the ship and subsystem level for a naval combatant ship. Until the advent of the LHA Project the use of the Reliability discipline within the U.S. Navy had generally been confined to the component or “black box” level and usually in the electronics field. The expressed purpose of the Reliability Program is to impact the ship design which will lead to the delivery of a better weapons system to the Navy. This paper describes the scope of effort undertaken to comply with Military Standard MIL-STD-785. The three phases of this extensive undertaking are discussed, namely definition of requirements, performance of analytical tasks to support the requirements and verification of requirements. The data sources employed and the methods of utilization are also described. Certain conclusions are presented based on accomplishments to date and expectations for the future portion of the contract.
Technical Paper

The Seat Interference Potential as an Indicator for the Aircraft Boarding Progress

2017-09-19
2017-01-2113
Passenger boarding is always part of the critical path of the aircraft turnaround: both efficient boarding and online prediction of the boarding progress are essential for a reliable turnaround progress. However, the boarding progress is mainly controlled by the passenger behavior. A fundamental scientific approach for aircraft boarding enables the consideration of individual passenger behaviors and operational constraints in order to develop a sustainable concept for enabling a prediction of the boarding progress. A reliable microscopic simulation approach is used to model the passenger behavior, where the individual movement is defined as a one-dimensional, stochastic, and time/space discrete transition process. The simulation covers a broad range of behaviors and boarding strategies as well as the integration of new technologies and procedures.
Technical Paper

Flow Visualization within a Capillary Evaporator

1993-07-01
932236
A Capillary Pumped Loop (CPL) is an advanced two-phase heat transport device which utilizes capillary forces developed within porous wicks to move a working fluid. The advantage this system has over conventional thermal management systems is its ability to transfer large heat loads over long distances at a controlled temperature. Extensive ground testing and two flight experiments have been performed over the past decade which have demonstrated the potential of the CPL as a reliable and versatile thermal control system for space applications. While the performance of CPL's as “black boxes” is now well understood, the internal thermo-fluid dynamics in a CPL are poorly known due to the difficulty of taking internal measurements. In order to visualize transient thermohydraulic processes occurring inside an evaporator, a see-through capillary evaporator was built and tested at NASA's Goddard Space Flight Center.
Magazine

Aerospace Engineering 2007-01-01

2007-02-01
UAV advances soar as market takes off Developers strive to slash weight but gain the ability to gather and move more data. On-wing designs Engine maturation programs ensure reliability for commercial powerplants. Promoting from within After serving a three-year term as Vice President-Automotive, Rich Schaum, Chrysler's former product development chief, becomes the new face of SAE International.
Magazine

Aerospace & Defense Technology: June 2017

2017-06-01
Small Form Factor Embedded Systems New Technologies Drive Diverse Solutions Making Laser Weapons a Reality Modelling and Simulation Tools for Systems Integration on Aircraft Rotorcraft Anti-Icing Systems Redundant Transmitting System in Aircraft (RTSA) Cassini Stays in Touch with NASA's Radio Science Subsystem Laser Integration on Silicon Photonic Circuits Through Transfer Printing New fabrication approach allows the massively parallel transfer of III-V coupons to a silicon photonic target wafer. High Energy Computed Tomographic Inspection of Munitions Inspection system provides additional level of quality assurance for R&D, reverse engineering, and malfunction investigations. Terahertz (THz) Radar: A Solution for Degraded Visibility Environments (DVE) Operating at higher frequencies than other types of radar produces tighter beams and finer resolution. Imaging Detonations of Explosives Using high-speed camera pyrometers to measure and map fireball/shock expansion velocities.
Magazine

Aerospace & Defense Technology: February 2019

2019-02-01
Ruggedizing Commercial-Grade Computers into MIL-Hardened Systems An Introduction to PCM Heat Sinks Eye Tracking Technology Improving the Skills Gap, Efficiency, and Quality Assurance in Aerospace Manufacturing Streamlining EMC Solutions for Avionics Interfaces Hardware Design of a High Dynamic Range Radio Frequency (RF) Harmonic Measurement System. Using RISC-V to Simplify Data Logging in Space Novel Characterization Methods for Anisotropic and Mixed-Conduction Materials Seven new characterization methods have been developed for the specialized materials used in state-of-the-art electronic and optoelectronic devices. Circuit Models for Robust, Adaptive Neural Control Understanding a nematode's simple circuit could provide a foundation for understanding much more complex behaviors.
Magazine

Aerospace Engineering & Manufacturing 2008-03-01

2008-03-01
Making an impact in fastening Engineers at Electroimpact help the company get a leg up on the competition in automated fastening. Narrowing in on military requirements UAVs/UCAVs are increasingly important, with the accent on integration- and wider engine choice. Machining and turning centers take center stage Makers of CNC machining equipment are incorporating more and better functionality into their products so users cope better with processing challenges such as those posed by tough new grades of aerospace materials. Open (and often) communication As aircraft companies battle for market share, uniting design and manufacturing teams remains a key challenge.
Book

Fatigue and Durability of Structural Materials

2006-03-01
This book explains how mechanical material behavior relates to the design of structural machine components. The major emphasis is on fatigue and failure behavior using engineering models that have been developed to predict, in advance of service, acceptable fatigue and other durability-related lifetimes. Information covers broad classes of materials used for high-performance structural applications such as aerospace components, automobiles, and power generation systems. Coverage focuses on metallic materials but also addresses unique capabilities of important nonmetals.
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