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A 3D Full Windshield Head Up Display

SAE International Journal of Aerospace

Thales Avionics-Philippe Coni, Jean Luc BARDON, Xavier servantie
  • Journal Article
  • 2017-01-2156
Published 2017-09-19 by SAE International in United States
A new concept of Head Up Display is presented, using the windshield as a transparent screen. This breakthrough technology does not need the use of complex combiner, bulky optics and overhead projection unit. The novel system uses several holographic optical elements to perform a 3D stereoscopic display, with the ability to present floating graphical objects in a large field of view. Augmented Reality display will be possible, increasing considerably the User Experience and situational awareness, without the need of wearing a bulky and complex Head Mounted Display.
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Time-Varying Loads of Co-Axial Rotor Blade Crossings

SAE International Journal of Aerospace

Georgia Institute of Technology-Narayanan Komerath
NASA Ames Research Center-Natasha L. Schatzman, Ethan A. Romander
  • Journal Article
  • 2017-01-2024
Published 2017-09-19 by SAE International in United States
The blade crossing event of a coaxial counter-rotating rotor is a potential source of noise and impulsive blade loads. Blade crossings occur many times during each rotor revolution. In previous research by the authors, this phenomenon was analyzed by simulating two airfoils passing each other at specified speeds and vertical separation distances, using the compressible Navier-Stokes solver OVERFLOW. The simulations explored mutual aerodynamic interactions associated with thickness, circulation, and compressibility effects. Results revealed the complex nature of the aerodynamic impulses generated by upper/lower airfoil interactions. In this paper, the coaxial rotor system is simulated using two trains of airfoils, vertically offset, and traveling in opposite directions. The simulation represents multiple blade crossings in a rotor revolution by specifying horizontal distances between each airfoil in the train based on the circumferential distance between blade tips. The shed vorticity from prior crossing events will affect each pair of upper/lower airfoils. The aerodynamic loads on the airfoil and flow field characteristics are computed before, at, and after each airfoil crossing. Results from the multiple-airfoil simulation show noticeable changes…
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Real Time Pose Control of an Industrial Robotic System for Machining of Large Scale Components in Aerospace Industry Using Laser Tracker System

SAE International Journal of Aerospace

Fraunhofer IFAM-Christian Moeller, Hans Christian Schmidt, Philip Koch, Christian Boehlmann, Simon Kothe
IPMT TU Hamburg-Harburg-Wolfgang Hintze
  • Journal Article
  • 2017-01-2165
Published 2017-09-19 by SAE International in United States
The high demand of efficient large scale machining operations by concurrently decreasing operating time and costs has led to an increasing usage of industrial robots in contrast to large scaled machining centers. The main disadvantage of industrial robots used for machining processes is their poor absolute accuracy, caused by the serial construction, resilience of gearings and sensitivity for temperature changes. Additionally high process forces that occur during machining of CFRP structures in aerospace industry lead to significant path errors due to low structural stiffness of the robot kinematic. These errors cannot be detected by means of motor encoders. That is why calibration processes and internal control laws have no effect on errors caused by elastic deformation. In this research paper an approach for increasing the absolute accuracy of an industrial milling robot with help of a Laser Tracker system during machining tasks will be presented. To measure the position and orientation of the robot tool center point (TCP) a specific adapter is mounted on the milling spindle near the TCP to provide a 6DoF measurement.…
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The Evolution of the Composite Fuselage - A Manufacturing Perspective

SAE International Journal of Aerospace

AJ Technical Services & Consulting-Alan Hiken
  • Journal Article
  • 2017-01-2154
Published 2017-09-19 by SAE International in United States
A review of critical technologies and manufacturing advances that have enabled the evolution of the composite fuselage is described. The author’s perspective on several development, military, and production programs that have influenced and affected the current state of commercial fuselage production is presented. The enabling technologies and current approaches being used for wide body aircraft fuselage fabrication and the potential reasons why are addressed. Some questions about the future of composite fuselage are posed based on the lessons learned from today and yesterday.
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A Methodology on Guiding Effectiveness-Focused Training of the Weapon Operator Using Big Data and VC Simulations

SAE International Journal of Aerospace

KAIST-Ojeong Kwon
University of Central Florida-Won Il Jung, Larry Lowe, Luis Rabelo, Gene Lee
  • Journal Article
  • 2017-01-2018
Published 2017-09-19 by SAE International in United States
Operator training using a weapon in a real-world environment is risky, expensive, time-consuming, and restricted to the given environment. In addition, governments are under intense scrutiny to provide security, yet they must also strive for efficiency and reduce spending. In other words, they must do more with less. Virtual simulation, is usually employed to solve these limitations. As the operator is trained to maximize weapon effectiveness, the effectiveness-focused training can be completed in an economical manner. Unfortunately, the training is completed in limited scenarios without objective levels of training factors for an individual operator to optimize the weapon effectiveness. Thus, the training will not be effective.For overcoming this problem, we suggest a methodology on guiding effectiveness-focused training of the weapon operator through usability assessments, big data, and Virtual and Constructive (VC) simulations. Usability assessments will be done to identify human factors affecting weapon’s effectiveness. Usability assessments consist of data-driven and judgment-driven analytics. The first is generated from raw simulation log files to evaluate the participant’s level of skill. The latter is generated from questionnaires, and…
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