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Streamlining EMC Solutions for Avionics Interfaces

  • Magazine Article
  • TBMG-33773
Published 2019-02-01 by Tech Briefs Media Group in United States

Lightning strikes to jet airliners are common - about once every 1000 flight hours. The DO-160G standard, Environmental Conditions and Test Procedures for Airborne Equipment, is a standard for the environmental testing of avionics hardware. Many airplane manufacturers specify DO-160G Section 22, lightning induced transient susceptibility, as a requirement for critical systems like guidance, radars, communications, engine control, and heat and air controls. Aircraft fuselage, wing and tail flight controls, wing tips, fin tips, engine nacelles, and landing gear are the areas most likely to be hit by lightning strikes.

 

Plasma Generator Using Spiral Conductors

  • Magazine Article
  • TBMG-33703
Published 2019-02-01 by Tech Briefs Media Group in United States

NASA's Langley Research Center has developed a patented SansEC sensor technology for use in many different areas, including tall structures and wind turbines. The SansEC technology is a proven wireless sensing platform capable of measuring the electrical impedance of physical matter in proximity to the sensor based on a change in its resonance response. The SansEC sensor also exhibits a unique characteristic to disperse the lightning strike current to help mitigate lightning damage. In a turbine blade application, an array of SansEC sensors will cover the surface area of the composite blade, providing both lightning mitigation and damage sensing. NASA Langley is seeking industrial partners/licensees to commercialize this technology. The research team at NASA Langley is available to assist with further development.

 

Artificial Lightning Tests on Metal and CFRP Automotive Bodies: A Comparative Study

SAE International Journal of Transportation Safety

Honda R&D Co., Ltd., Japan-Hiroshi Makishima
Nippon Institute of Technology, Japan-Sultan A. Alkhteeb, Shigeru Oho, Yuki Nagashima, Hiroyuki Shimizu
  • Journal Article
  • 09-07-01-0001
Published 2019-01-07 by SAE International in United States
Carbon fiber reinforced plastic (CFRP) has been used in automobiles as well as airplanes. Because of its light weight and high strength, CFRP is a good choice for making vehicle bodies lighter, which would improve fuel economy. Conventional metal bodies provide a convenient body return for electric wiring and offer good shielding against electromagnetic fields. Although CFRP is a conductor, its conductivity is much lower than that of metals. Therefore, CFRP bodies are usually not useful for electric wiring. In thunderstorms, an automotive body is considered to be a Faraday cage that protects the vehicle’s occupants from the potential harms of lightning. Before CFRP becomes widely applied to automotive bodies, its electric and electromagnetic properties need to be investigated in order to determine whether it also works as a Faraday cage against lightning. In this article, CFRP and metal body vehicles were tested under artificial lightning. The electric discharging caused by the artificial lightning in the vehicles was investigated under different grounding conditions. A CFRP roof plate and a CFRP box mimicking vehicle cabin were…
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Eyes in the Sky: Using Optical Filters to Observe and Measure Earth From a Different Perspective

  • Magazine Article
  • TBMG-29734
Published 2018-07-01 by Tech Briefs Media Group in United States

“Measurement is the first step that leads to control and eventually to improvement. If you can’t measure something, you can’t understand it. If you can’t understand it, you can’t control it. If you can’t control it, you can’t improve it.”

 

ASSEMBLED COUPLING ENVELOPE, THREADLESS - FLEXIBLE, FIXED CAVITY, CURRENT CARRYING, SELF BONDING, ENVELOPE DIMENSIONS

G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
  • Aerospace Standard
  • AS7511A
  • Current
Published 2018-04-18 by SAE International in United States
No Abstract Available.
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KSC Weather Data Archive

  • Magazine Article
  • TBMG-27991
Published 2017-12-01 by Tech Briefs Media Group in United States

The Spaceport Weather Data Archive provides a fully searchable database of weather data gathered at Kennedy Space Center (KSC) and the Cape Canaveral Air Force Station. Not only can the user easily retrieve data and download it, but the user can also view graphically the weather data on a map overlay. The data are updated every hour for certain instruments, and as frequently as every 5 minutes for others. Data is available 24/7 over a publicly accessible Web site. The data is used by researchers to validate launch commit constraint criteria, and to ensure safe operations at KSC. The site provides links to technical publications and other resources, and allows data to be downloaded for further investigation.

 

ASSEMBLED COUPLING ENVELOPE, THREADLESS - FLEXIBLE, FIXED CAVITY, CURRENT CARRYING, SELF BONDING, ENVELOPE DIMENSIONS

G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
  • Aerospace Standard
  • AS7511
  • Historical
Published 2017-09-07 by SAE International in United States
No Abstract Available.
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F-16 Upgrades

  • Magazine Article
  • TBMG-27371
Published 2017-08-01 by Tech Briefs Media Group in United States

Lockheed Martin Bethesda, MD 817-777-6148 For more info click

 

Risks of Lightning to Automotive Occupants and Electrical/Electronic Systems

Nippon Institute of Technology-Sultan A.M Alkhteeb, Shigeru Oho, Yuki Nagashima, Seisuke Nishimura, Hiroyuki Shimizu
Published 2017-03-28 by SAE International in United States
Lightning strikes on automobiles are usually rare, though they can be fatal to occupants and hazardous to electronic control systems. Vehicles’ metal bodies are normally considered to be an effective shield against lightning. Modern body designs, however, often have wide window openings, and plastic body parts have become popular. Lightning can enter the cabin of vehicles through their radio antennas. In the near future, automobiles may be integrated into the electric power grid, which will cause issues related to the smart grid and the vehicle-to-grid concept. Even today, electric vehicles (EVs) and plug-in hybrid vehicles (PHEVs) are charged at home or in parking lots. Such automobiles are no longer isolated from the power grid and thus are subject to electric surges caused by lightning strikes on the power grid. A charging system connected to an EV or PHEV should absorb the surge, but powerful lightning strikes can overwhelm the surge protection and intrude into the electric and electronic (E/E) systems of the vehicles, as often happens with household electrical equipment.This paper discusses the increasing risks…
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Lightning Protection and Detection System

  • Magazine Article
  • TBMG-26155
Published 2017-01-01 by Tech Briefs Media Group in United States

NASA’s Langley Research Center has developed a sensor technology for structural health monitoring on composite aircraft surfaces. When conventional aircraft are struck by lightning, the result can range from no damage to serious damage requiring extensive repairs that can take the airplane out of service for an extended period of time. The SansEC technology is a proven wireless sensing platform capable of measuring the electrical impedance of physical matter in proximity to the sensor based on a change in its resonance response. The sensor also exhibits a unique characteristic to disperse the lightning strike current to help mitigate lightning damage. In this application, an array of SansEC sensors will cover a selective area of the aircraft surface, providing both mitigation and damage sensing.