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Briefs: Software
An Upwind Parabolized Navier-Stokes Solver (UPS) for Supersonic and Hypersonic Flow Simulation, Version 6.1
The simulation of high-speed flow involves unique challenges such as the treatment of strong flow gradients associated with shock waves and expansion fans, as well as the modeling, at hypersonic speeds, of air chemistry effects. However,...
Briefs: Aerospace
Multi-Fidelity Simulator (MFS)
Many next-generation air traffic algorithms may be formed by learning algorithms or dynamic programming techniques. These techniques form their solutions through iterative methods where the efficacy of a proposed solution needs to be evaluated for every round of iteration. In complex air traffic scenarios, often the...
Briefs: Aerospace
Researchers at NASA's Armstrong Flight Research Center (AFRC) recently completed a study of the feasibility of aerial towing an unpiloted, sub-scale vehicle to supersonic flight conditions to examine the...
Briefs: Mechanical & Fluid Systems
Vented Launch Vehicle Adapter for a Manned Spacecraft With “Pusher” Launch Abort System
A Launch Vehicle Adapter (LVA) was developed that provides a structural interface between a Commercial Crew Vehicle (CCV) Crew Module/Service Module Spacecraft (CM/SM) and an expendable launch vehicle. It also provides a means to control the exhaust plume...
Briefs: Mechanical & Fluid Systems
Uncontrolled and rapid movement of equipment and people through security gates has been a major problem for security personnel. In situations pertaining to facility security, it is desirable to delay the passage of a...
Briefs: Software
Efficient Two-Dimensional Solution Methods for the Navier-Stokes Equations
ARC2D is a computational fluid dynamics (CFD) program for two-dimensional airfoil and simply connected geometries. The program uses implicit finite-difference techniques to solve two-dimensional Euler equations and Navier-Stokes equations. It is based on the Beam and Warning...
Briefs: Photonics/Optics
The scanning tunneling microscope (STM) has become one of the most powerful tools used in studying the surface structure of electrically conducting solid-state materials at an atomic...
Briefs: Software
Using SysML to Model Layered System Interfaces
To produce accurate system architecture descriptions, it is essential to be able to describe interfaces between system elements at different levels of abstraction and from different perspectives at the same time. For example, the connection from system A to system B may be viewed at a high level as...
Briefs: Mechanical & Fluid Systems
Traditional heat shield design isolates the functions of the thermal protection system (TPS) from the underlying load-carrying structure. This is due to the use of brittle TPS material that...
Articles: Electronics & Computers
This column presents technologies that have applications in commercial areas, possibly creating the products of tomorrow. To learn more about each technology, see the contact information provided for that innovation.
Briefs: Software
Pegasus 5.2 Software for Automated Pre-Processing of Overset CFD Grids
Pegasus software is used as a pre-processor for overset-grid Computational Fluid Dynamics (CFD) simulations. It provides the hole-cutting and connectivity information between structured overset grids. The main features of the software include automated hole-cutting algorithms, a...
Briefs: Sensors/Data Acquisition
Hydrogen is a promising potential fuel for cars, buses, and other vehicles, and can be converted into electricity in fuel cells. It already is used in medicine and space exploration, as well as in the production...
Briefs: Mechanical & Fluid Systems
Electrical circuits such as printed wiring boards or hybrid microcircuits designed to utilize surface mount electrical components are commonly assembled by computer-controlled automated...
Briefs: Mechanical & Fluid Systems
Microelectromechanical systems (MEMS) are critical devices for various highly sensitive applications; however, the development and potential fielding of these next-generation smart systems is currently...
Briefs: Materials
Self-Healing, Self-Lubricating Tribofilm
Tribologists have developed a diamond-like film that is generated by the heat and pressure of an automotive engine. The ultra-durable, self-lubricating tribofilm — a film that forms between moving surfaces — can be made to develop self-healing, diamondlike carbon (DLC) tribofilms. The film generates...
Briefs: Photonics/Optics
Fiber-Optic Environmental Radiation Dosimeter
An all-optical, fiber-optic-coupled remote radiation sensor was developed using luminescent, copper-doped quartz material. The key to the technology is the doped quartz material, which produces a luminescence signal that is directly proportional to the radiation dose.
Briefs: Materials
NASA Langley Research Center has developed a functionally graded metal-metal composite structure. The structure is created using a method that avoids deleterious reactions between the...
Briefs: Mechanical & Fluid Systems
Tuned mass dampers are used worldwide to mitigate vibrations in structures like buildings and bridges where excessive movement can be alarming or even sickening to occupants. The vast...
Application Briefs: Energy
Siemens PLM SoftwarePlano, TXwww.plm.automation.siemens.com
The use of lithium-ion (Li-ion) batteries has made the electric vehicle (EV) a reality, and electric...
Briefs: Motion Control
Today's water distribution systems lose an average of 20 percent of their supply because of leaks. Current leak-detection systems are expensive and slow to operate, and they don't work well in systems...
Products: Motion Control
Torque Motor
ThinGap (Camarillo, CA) has developed the first member of a new motor family of high peak torque density brushless PM motors that reach over 20 Nm/Kg. The frameless LSI 105 torque motor model is 105 mm OD (4.125...
Briefs: Motion Control
Large amounts of existing space debris pose a threat to satellites, space vehicles, and astronauts aboard those vehicles. However, cleaning up the debris is problematic. For example, suction cups don't...
Briefs: Motion Control
Replacing rigid joints and linkages with mechanisms that bend offers a number of potential advantages, even as it makes designing devices more difficult. A computational design tool...
Articles: Motion Control
The need for actuators has grown exponentially. Nearly everywhere you look you can see pneumatic, hydraulic, or electric actuator systems at work in an endless variety of applications. There are many stereotypes...
Briefs: Motion Control
A lightweight module for rapid, accurate, and versatile positioning of semiconductor chips features a novel electromechanical actuator that can move objects both linearly and...
Articles: Motion Control
Every system design presents a unique set of specifications regarding cost, space, time-to-market, and other factors. Designers must therefore make tradeoffs to meet these requirements, such as opting for a higher...
Articles: Motion Control
Because ball screws are available in both inch and metric dimensions, designers sometimes begin the specification process by selecting a product family based on the unit of...
Application Briefs: Motion Control
ALIO Industries designs and builds very high precision automation stages for nano-level manufacturing and research applications, including microlithography,...
Briefs: Motion Control
Folding robots based on origami have emerged as an exciting new frontier of robotic design. However, they generally require onboard batteries or a wired connection to a power source, making them...
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Choosing the Right N-Port Strategy: Multiport VNAs vs. Switch...