Aerospace

Briefs : Imaging
Imaging Detonations of Explosives

An effort has been made within the US Army Research Laboratory (ARL) to extract quantitative information on explosive performance from high-speed imaging of explosions. Explosive fireball surface temperatures are measured using imaging pyrometry (2-color 2-camera imaging pyrometer; full-color single-camera...

Briefs : Aerospace
Laser Integration on Silicon Photonic Circuits Through Transfer Printing

The purpose of this project was to develop a transfer printing process for the massively parallel integration of III-V lasers on silicon photonic integrated circuits. Silicon has long offered promise as the ultimate platform for realizing compact photonic integrated...

Briefs : Sensors/Data Acquisition
Determining Detection and Classification Potential of Munitions Using Advanced EMI Sensors in the Underwater Environment

Hazardous ordnance items are present along coastlines and in rivers and lakes in waters shallow enough to cause concerns for human recreational and industrial activities. The presence of water makes it difficult to detect and...

Briefs : Photonics/Optics
High Energy Computed Tomographic Inspection of Munitions

An advance computed tomography (CT) system was recently built for the U.S. Army Armament Research, Development and Engineering Center, Picatinny Arsenal, NJ, for the inspection of munitions. The system is a charged coupled device (CCD) camera based CT system designated with the name...

Briefs : Imaging
Terahertz (THz) Radar: A Solution For Degraded Visibility Environments (DVE)

An accurate view of the physical world is frequently vital. For example, rotary wing aircraft pilots must have knowledge of the terrain in order to safely fly their aircraft. Therefore, systems capable of generating images of the environment of sufficient quality to...

Briefs : Aerospace
Development of Photoacoustic Sensing Platforms

In recent years, photoacoustic spectroscopy (PAS) has emerged as an attractive and powerful technique well suited for sensing applications. The development of high-power radiation sources and more sophisticated electronics, including sensitive microphones and digital lock-in amplifiers, have allowed...

Briefs : Robotics, Automation & Control
Experimental Confirmation of an Aquatic Swimming Motion Theoretically of Very Low Drag and High Efficiency

It has been established theoretically that self-propulsion of deformable bodies in ideal fluid can occur with a careful specification of the deformation mode shape. With the fluid assumed ideal, vortex shedding, rotational wake, and induced...

Briefs : Robotics, Automation & Control
Identifying the Flow Physics and Modeling Transient Forces on Two-Dimensional Wings

The main objective of this research was to better understand the flow physics of aircraft wings undergoing highly unsteady maneuvers. Reduced-order models play a central role in this study, both to elucidate the overall dynamical mechanisms behind various flow...

Briefs : Aerospace
Station/Orbiter Multibody Berthing/Docking Analysis Tool (SOMBAT)

The main objective of this work was to develop a high-fidelity, nonlinear simulation of complex flexible structures with active control systems. A multibody system can consist of several flexible articulating components. The system can also have multiple control systems. The main...

Briefs : Aerospace
Timed Injection of Simulation Data via Redundant Network Ports in Time Triggered Ethernet (TTE) Systems

Vehicle-scale integration and test requires closed-loop simulation using full-scale avionics systems or even entire vehicles. Incorporation of simulation data into real systems is problematic because real system sensors report the real...

Briefs : Aerospace
Two-Phase Airborne Security Search

This innovation is an airborne area security search system and method that features a two-phase search from an unmanned aerial vehicle (UAV) using a novel combination of sensor technologies not previously employed. Its key strength is a wide-area search at high resolution for reliable identification of objects....

Briefs : Aerospace
Robust, Optimal Subsonic Airfoil Shapes

This invention relates to the design of optimal shapes of airfoils, such as turbine blades, operating in subsonic flow regimes. An airfoil, such as a propeller blade or a turbine vane or blade (collectively referred to herein as an “airfoil”), may be used in a variety of environments, including...

Briefs : Aerospace
Merging and Spacing Software in the ACES Simulation

Merging and Spacing (M&S) in ACES is a software product written in the Java programming language that adds scheduling and management of flights into and out of an airport for the Airspace Concepts Evaluation System (ACES) simulation. ACES is a systems-level simulation that portrays NAS-wide...

Briefs : Aerospace
Data Server for Real-Time Display Interface

The purpose of this software is to decouple display and data interface functions by developing a central data server. By using the centralized data server, flight displays can be easily transferred between simulators and research airplanes without having to reprogram flight display graphics. Therefore,...

Briefs : Aerospace
Aircraft Wing Flap Noise-Reducing Fins

Two different modifications have been developed for the edges of aircraft wing flaps to reduce noise. Reactive Orthotropic Lattice Diffuser (ROLD) is a modification that consists of a honeycomb-like, interconnected structure added to the region of the flap that experiences the highest degree of...

Briefs : Aerospace
Direct Multiple Shooting Optimization with Variable Problem Parameters

Solving complex trajectory problems optimally is of vital importance to the success of future aerospace programs. Trajectory optimization research has been divided into two main categories: indirect methods and direct methods. Both methodologies have been tested and...

Briefs : Aerospace
Digitally Steered Phased Antenna Array for GPS Applications

GPS signals are sparse and weak at high altitudes above the GPS constellation; this includes GEO and HEO orbit regimes. Spacecraft operating here need a high-sensitivity receiver capable of acquiring and tracking these weak signals throughout their orbits. Most space GPS receivers are...

Briefs : Aerospace
Broadband Circularly Polarized Antenna Array for Mars Rover Direct-to-Earth Communications

Mars rovers and other landers typically use UHF relay to return their science and engineering data to Earth. Direct-To-Earth (DTE) communications are typically used for commanding. If future UHF relay capability becomes diminished, Mars landers may be...

Briefs : Aerospace
Robust, Low-Density Parity- Check Decoder Design to Mitigate Pulsed Radio Frequency Interference

Low-Density Parity-Check (LDPC) codes are a class of forward error correction (FEC) linear block codes that provide near-capacity performance for power-efficient communications. Optimum decoding requires accurate combining ratio estimation to scale...

Briefs : Aerospace
Sea-Level Flight Demonstration Altitude Characterization of a LO2/LCH4-Based Ascent Propulsion Lander

A recently developed 1,500-lbf (6,672-N) thrust-class liquid oxygen/liquid methane (LO2/LCH4) rocket engine was tested at both sea level and simulated altitude conditions. Sea-level tests were conducted using both a static...

Briefs : Imaging
Improved Hall Thrusters Fed by Solid Phase Propellant

Hall thrusters normally use Xe propellant, which is expensive and scarce in the solar system. The weight of Xe is such that typical Hall thrusters are limited in specific impulse to approximately 3,000 s. The objective of this program was to improve and demonstrate Mg Hall thruster systems....

Briefs : Aerospace
Aerodynamics Model for a Solid Rocket Booster

NASA required an aerodynamics model of a spent solid rocket booster (SRB) to predict trajectory and impact location of the Ares I first stage after separation. The software needed to be integrated into new simulations written in C. Marshall Space Flight Center (MSFC) had previously developed a solid...

Briefs : Aerospace
Real-Time Aerodynamic Parameter Estimation Without Airflow Angle Measurements

Accurate measurements of airflow angles are among the most expensive and difficult to obtain in flight testing because of the complexity of the airflow near the aircraft and the consequent need to carefully mount and calibrate the sensors. A novel technique was...

Briefs : Aerospace
Airborne Coordinated Conflict Resolution and Detection (ACCoRD) Framework

To accommodate the predicted increase in air traffic, the next generation of air traffic management (ATM) systems relies on operational concepts where the responsibility for separation is distributed between airborne and ground systems. These distributed modes of operation...

Briefs : Aerospace
Integrated Pitot Health Monitoring System

The health and integrity of aircraft sensors and instruments play a critical role in aviation safety. Inaccurate or false readings due to icing of airspeed sensors in flight can lead to improper decision-making, resulting in serious consequences. Icing or blockages of pitot airspeed sensors provide very...

Briefs : Aerospace
NASA Aircraft Management Information System (NAMIS)

The NASA Aircraft Management Information System (NAMIS) is an Enterprise Resource Planning/Mission Support software suite designed to meet both the mission support requirements and the business management requirements of NASA Johnson Space Center’s (JSC) Aircraft Operations Division (AOD)....

Briefs : Aerospace
MMOD Risk Mitigation Technology for Spacecraft Thermal Protection Systems

The proposed concept uses sensors to detect high-temperature plasma ingestion during entry through a breach in the thermal protection system (TPS) caused by a micrometeoroid orbital debris (MMOD) impact. It uses consumables usually available on human-rated spacecraft such...

Briefs : Photonics/Optics
Shock-Sensing Apparatus

Acompact shock-sensing device, which employs an innovative light sheet generator, has been created. The device may be used either as a solo aerodynamic shock detector or in combination with a scanning mode shock sensor. This permits easy detection and tracking of unstable and traveling shocks in supersonic inlets.

Briefs : Mechanical & Fluid Systems
ACS Anchor Guide Stud and Caddy

An alignment guide and a mounting interface for two of the repair tools on orbit during the Hubble Space Telescope Servicing Mission 4 (see http://asd.gsfc.nasa.gov/archive/hubble/missions/sm4.html) were developed. This design can be installed in a timely manner, and was specifically developed for a worksite with...

Briefs : Aerospace
Next-Generation, Lightweight Hard Upper Torso/Hatch Assembly

The current MK-III carbon-graphite/epoxy Hard Upper Torso (HUT)/hatch assembly represented an 8.3 psi (≈57 kPa) technology demonstrator model of a zero pre-breathe suit. In this configuration, the MK-III suit weighed about 120 lb (≈54 kg). Since future lunar/planetary suits will...