Keyword: Optimization

Briefs: Electronics & Computers

A new technology delivers temperature hardening in a number of products at the CMOS process level while increasing overall product reliability and longevity. Providing...

Application Briefs: Imaging

On March 11, NASA tested the powerful five-segment booster for NASA’s new rocket, the Space Launch System. To provide critical data for the rocket’s first flight, eight...

Briefs: Aerospace
Method for Improving Control Systems with Normalized Adaptation by Optimal Control Modification

A new technology has been developed for improving performance and stability of control systems. This method represents a significant advancement in the state-of-the-art of adaptive control technology. The present invention is a new type of adaptive...

Briefs: Medical
Retinal Light Processing Using Carbon Nanotubes

NASA has patented a new technology called the Vision Chip, an implantable device that has the potential to restore or supplement visual function in a diseased or damaged retina. This technology could benefit millions of people in the US and globally who suffer from degenerative diseases of the...

Briefs: Information Technology
Synthetic Imaging Maneuver Optimization — SIMO

Space-based interferometry missions have the potential to revolutionize imaging and astrometry, providing observations of unprecedented accuracy. Realizing the full potential of these interferometers poses several significant technological challenges. These include the efficient maneuvering of...

Briefs: Software
JavaGenes Data Optimization

JavaGenes is a general-purpose software program that implements several different data optimization techniques. The program is intended for problems that have no gradient, comparing genetic algorithms with stochastic hill climbing and simulated annealing to generate optimal design solutions. JavaGenes can create many...

Briefs: Imaging

DARPA’s Mind’s Eye Program aims to develop a smart camera surveillance system that can autonomously monitor a scene and report back human-readable text descriptions of...

Briefs: Data Acquisition
Controlling Fast Acquisition Hardware to Pre-Position a Satellite to Constrain Baseband Searches

When adapting GPS sensor technology from an aviation environment to a space environment, the search window for a satellite’s frequency and code phase is greatly increased. This problem is also magnified when multiple antennas are used. A new...

Briefs: Software
PEGASUS 5.2: Automated Pre-Processing of Overset CFD Grids

The Pegasus software is used as a pre-processor for overset-grid computational fluid dynamic (CFD) simulations. The main features of the software include: automated hole cutting algorithms; a projection scheme for fixing small discretization errors in overset surfaces; efficient...

Briefs: Materials
Woven Thermal Protection System

Woven thermal protection system (WTPS) is a new approach to producing TPS materials that uses precisely engineered 3D weaving techniques to customize material characteristics needed to meet specific missions requirements for protecting space vehicles from the intense heating generated during atmospheric entry....

Briefs: Aerospace
Automated Table Lookup Solution Algorithm of the Optimal Powered Descent Guidance for Planetary Landing

A novel automated table lookup method is developed to compute the near-fuel-optimal powered descent guidance trajectories, in real-time, for planetary soft landing. The main advantage of this algorithm is that it can be executed autonomously...

Briefs: Information Technology
Advanced Navigation Strategies for Asteroid Sample Return Missions

Sample-return missions to primitive solar system bodies (asteroids, comets, and planetary satellites) can provide a wealth of scientific information and insight into the composition and origins of the solar system. Recent interest in primitive body missions has been driven by the...

Briefs: Photonics/Optics

A design methodology was developed that optimizes the performance of active mirrors. Patterns of parameterized ellipsoidal actuators are overlaid onto the mirror,...

Briefs: Information Technology
Fast Classification Method for Multivariate Mixtures of Spectroscopic Responses

In many fields of spectroscopy, classification of the measured multivariate response is not always a straightforward process. Accurate classification is limited by many factors that are highly dependent upon the spectroscopy method being utilized. In all cases,...

Briefs: Information Technology
Peak-Seeking Control Method

Peak-seeking algorithms optimize physical processes in real time and are widely used throughout a variety of industries. However, measuring associated parameters in changing conditions, and responding to them appropriately, is difficult because the measurements are typically distorted by noise. This technology...

Briefs: Mechanical & Fluid Systems

Equipment for space exploration is almost impossible to test on Earth. Testing is expensive and cannot replicate the conditions of launch, cruise, landing, and travel across a planetary surface....

Briefs: Software
3D Finite Element Model of Magnetic Mirror and Nano Antenna

A 3D finite element mathematical model has been developed for representing a behavior of a magnetic mirror and nano antenna subject to polarized incident light. This model represents the fourth generation of magnetic mirror with the goal of suppressing the diffraction.

Briefs: Software

The European Organization for Nuclear Research (CERN) requires new magnets that are smaller than their predecessors to accommodate new instrumentation. Because of their size, these...

Briefs: Information Technology

T-MATS is an open-source Simulink library for use in modeling and simulation of thermodynamic systems. It provides a user friendly graphical MATLAB/Simulink-compatible...

Briefs: Software
Algorithm Enhancements to Powered Descent Guidance Software

The Powered Descent Guidance (PDG) software provides a computationally efficient guidance algorithm for powered descent that ensures satisfaction of the governing dynamics, along with adherence to physical control and state constraints, such as avoid the surface, limit thrust magnitude...

Briefs: Mechanical & Fluid Systems
Evolutionary Mission Trajectory Generator

The Evolutionary Mission Trajectory Generator (EMTG) is a global trajectory optimization tool for designing interplanetary missions that perform multiple flybys and either low-thrust or high-thrust propulsive maneuvers on the way to destinations in the solar system. Some targets, such as Mars and Venus,...

Briefs: Software
Determining Radiation Shielding Capability of the Earth’s Atmosphere from FAA Radiation Data

The FAA, using its CARI-6 program, provides galactic cosmic radiation dosage rates for any location on the Earth from ground up to 60,000 ft (≈18,300 m). One way to protect astronauts from galactic cosmic radiation (GCR) on a Mars mission is to use...

Briefs: Physical Sciences
Efficient Spectral Endmember Detection Onboard Spacecraft

Spaceflight and planetary exploration place severe constraints on the available bandwidth for downlinking large hyperspectral images. Communications with spacecraft often occur intermittently, so mission-relevant hyperspectral data must wait for analysis on the ground before it can inform...

Briefs: Software
PACIFIC: Process Algebra Capture of Intent from Information Content

Mixed-initiative teams of robots and humans working side-by-side in close proximity to each other need to be capable of reasoning about the actions and activities of each other within a mission context. This capability requires the robotic agents to have a sense of self, and...

Briefs: Information Technology
Ionospheric Slant TEC Analysis Using GNSS-Based Estimation (IonoSTAGE)

As signals emitted by global navigation satellite systems (GNSS) propagate toward users on or near the surface of the Earth, they experience delay due to the presence of charged particles in the ionosphere. Currently, ionospheric delay is the largest source of GNSS...

Briefs: Physical Sciences

A new technique allows a mercury-cadmium-telluride (MCT) focal plane array (FPA) to operate at room temperature. These results were obtained...

Briefs: Manufacturing & Prototyping
Solar Panel and System Design to Reduce Heating and Optimize Corridors for Lower-Risk Planetary Aerobraking

This innovation presents a spacecraft aerobraking approach that reduces heating and optimizes corridors, which reduces overall risk. This is accomplished by combining solar panel aspect ratio and edge features with simple spacecraft...

Briefs: Information Technology
Scheduling Targeted and Mapping Observations with State, Resource, and Timing Constraints

This innovation creates observations of both targeted geographical regions of interest and general mapping observations, while respecting spacecraft constraints such as data volume, observation timing, visibility, lighting, season, and science priorities....

Briefs: Mechanical & Fluid Systems
Locking Orifice Retaining Nut

Fluid flow systems often require orifices to control pressure drop or flow rate. These orifices are often retained in bolted housings that require seals and introduce potential leak points into the system.