NASA Tech Briefs’ Information Sciences Web page spotlights new computer software architectures, algorithms, mathematical models, and simulation and analysis tools, as published in NASA Tech Briefs magazine. Many of the Tech Briefs below are correlated to a Technical Support Package (TSP) or White Paper that can be downloaded free of charge.
Feb 2012
Model-Based Fault Diagnosis: Performing Root Cause and Impact Analyses in Real Time
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The methodology and its required interfaces have been implemented to become a commercial product for integrated systems health management.
Generic, object-oriented fault models, built according to causal-directed graph theory, have been integrated into an overall software architecture dedicated to monitoring and predicting the health of mission- critical systems. ...Read More >>
Real-Time Flight Envelope Monitoring System
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The system uses a combination of three separate detection algorithms to provide a warning at a preset number of degrees prior to stall.
The objective of this effort was to show that real-time aircraft control-surface hinge-moment information could be used to provide a robust and reliable prediction of ...Read More >>
Interactive Schematic Integration Within the Propellant System Modeling Environment
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Commercial areas of interest include automotive engine components, petroleum refineries and offshore rigs, and industrial machinery builders.
Task requirements for rocket propulsion test preparations of the test stand facilities drive the need to model the test facility propellant systems prior to constructing physical modifications. The Propellant System Modeling ...Read More >>
Magnetic and Electric Field Polarizations of Oblique Magnetospheric Chorus Waves
A theory was developed to explain the
properties of the chorus magnetic and
electric field components in the case of an
arbitrary propagation angle. The new theory
shows that a whistler wave has circularly
polarized magnetic fields for oblique
propagation. This theoretical result is verified
by GEOTAIL observations. The wave
...
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Variable Sampling Mapping
The performance of an optical system
(for example, a telescope) is limited by
the misalignments and manufacturing
imperfections of the optical elements in
the system. The impact of these misalignments
and imperfections can be quantified
by the phase variations imparted on
light traveling through the system. Phase
retrieval is a ...
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Jan 2012
Hybrid Collaborative Learning for Classification and Clustering in Sensor NetworksExplanation Capabilities for Behavior-Based Robot Control
Shape and Color Features for Object Recognition Search
A DNA-Inspired Encryption Methodology for Secure, Mobile Ad Hoc Networks
Spacecraft Attitude Tracking and Maneuver Using Combined Magnetic Actuators
Dec 2011
Framework for Integrating Science Data Processing Algorithms Into Process Control SystemsBase Flow Model Validation
Time Synchronization and Distribution Mechanisms for Space Networks
Minimum Landing Error Powered- Descent Guidance for Planetary Missions
Local Estimators for Spacecraft Formation Flying
Nov 2011
CropEx Web-Based Agricultural Monitoring and Decision SupportHigh-Performance Data Analysis Tools for Sun-Earth Connection Missions
Achieving Exact and Constant Turnaround Ratio in a DDS-Based Coherent Transponder
Surface Modeling to Support Small-Body Spacecraft Exploration and Proximity Operations
Oct 2011
Adaptive System Modeling for Spacecraft SimulationLidar-Based Navigation Algorithm for Safe Lunar Landing
Tracking Object Existence From an Autonomous Patrol Vehicle
Sep 2011
Finding Every Root of a Broad Class of Real, Continuous Functions in a Given IntervalKalman Orbit Optimized Loop Tracking
Development of Jet Noise Power Spectral Laws