Acoustic Propagation and Emulation Toolset (APET)

This software suite assesses the effects of terrain, weather, and computational method on acoustic propagation and audibility.

Currently, APET includes a modified version of the Rotorcraft Noise Model (RNM, version 7). It also includes the newly developed Spectral Attenuation Method (SAM), which contains the Ray Tracing Program (RTP) and two versions of a Green's Function Parabolic Equation (GFPE) code. The third component of APET is an audibility prediction scheme initially called ICHIN (I Can Hear It Now), and further developed by Wyle as AUDIB.

Posted in: Briefs, Software, Computer simulation, Acoustics, Noise, Acoustics, Noise
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AUTONOMIE Automotive System Design Software

AUTONOMIE is a MATLAB-based software environment and framework for automotive control system design, simulation, and analysis. It simulates subsystems, systems, or an entire vehicle, and predicts and analyzes fuel efficiency and performance. The software performs analyses and tests for virtual calibration, verification, and validation of hardware models and algorithms, and supports system hardware and software requirements.

Posted in: Briefs, Software, CAD / CAM / CAE, CAD, CAM, and CAE, Electronic control systems, Electronic control systems
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Numerical Method to Predict the Evaporation Time of a Water Droplet Attached to a Solid Boundary in the Presence of Fluid Flow

One of the objectives of the In-Situ Resource Utilization (ISRU) RESOLVE project was to extract water from lunar regolith by heating and then capturing and quantifying the released water. A potentially large error in measurements would occur if some of the water condensed in the piping between the oven and the water capture bed. Questions arise if condensation were to occur (either because of a low-temperature or high-pressure area): 1) how long would it take for convection and diffusion to evaporate the droplet back into the process stream, 2) how will it affect the ISRU RESOLVE process, 3) can accurate data be obtained, 4) how much longer will the process have to run to capture all the water, and 5) what conditions are the most favorable to quicken the evaporation process?

Posted in: Briefs, Software, Mathematical models, Water reclamation
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Generation of Cut- and Split-Cells for Face-Piercing Geometry in Embedded-Boundary Cartesian Methods

This innovation addresses several critical issues in the construction of cut control volumes using embedded-boundary Cartesian mesh generators. The innovation considers the case of a surface triangulation intersecting the face of a Cartesian hex without intersecting any of its edges. Such face-piercing geometry is common in practical applications, especially when surface variations occur on a smaller scale than the Cartesian hex dimensions, i.e. coarse meshes. Examples include geometric perturbances such as nozzles, or even minor surface undulations and dimples. Furthermore, the innovation also considers the case of a surface triangulation containing internal passages within the Cartesian hex. The innovation correctly handles situations where hexes split into multiple control volumes are merged together if internal connections exist within the surface.

Posted in: Briefs, Software, Mathematical models, Fabrication
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High-Speed Particle Image Velocimetry

This technology simultaneously tracks the motion of high numbers of object images under extreme, high-concentration conditions.

Particle flow fields of high particle concentration are found in many commercial applications, including chemical processing, energy conversion, pharmaceutical processing, food processing, and biomedical applications. This technology will allow, for the first time, the measurement of particle motion within high particle concentration fields.

Posted in: Briefs, Software, Computational fluid dynamics, Measurements, Particulate matter (PM)
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High-Throughput Multiphysics and Multiscale Simulations in COMSOL®

If you want to learn about high-throughput multiphysics and multiscale simulations, then tune into this webinar with guest speaker Ed Furlani from the University at Buffalo.

Posted in: On-Demand Webinars, Software
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DO-254 Benefits Versus Costs

DO-254, the design assurance guideline for airborne electronic hardware, is considered by many to be a simple cut/paste of DO-178, its avionics software sibling. Surely, as with wine and beer, both are fermented liquids which become increasingly expensive with increased complexity. While similarities abound, so do their many differences. And truly, DO-254 is the benefactor, or bane, of avionics projects the world over. But is DO-254 really unduly expensive? Does it add value? Will it improve safety and reliability? Does it have benefits? What are the true costs versus benefits? These important questions are answered herein.

Posted in: White Papers, White Papers, Aerospace, Software
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Open Mission Control Technologies (Open MCT) Web

The fundamental idea behind the Mission Control Technologies (MCT) project is to build software from pieces that can be assembled by end users to create integrated visualizations. Applications are eliminated in favor of compositions of live data objects that can be combined in different ways for different users and missions as required, in contrast to the more traditional software development method of pre-determining functionality and building a monolithic application. This new approach has the potential to change how users design, deploy, and maintain mission system software.

Posted in: Briefs, Software, Design processes, Computer software / hardware, Computer software and hardware, Imaging, Imaging and visualization, Computer software / hardware, Computer software and hardware, Imaging, Imaging and visualization
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Human Factors Analysis Support Tool (H-FAST) v 2.0

Large-scale systems engineering projects involve multiple teams of engineers working in parallel. These projects typically include numerous human factors challenges, many of which first become evident during the integration stage. Human factors evaluations are essential in gathering human performance data and analyzing the usability of new design concepts. These evaluations are generally carried out by human factors experts due to the level of expertise required. However, many projects may not have a dedicated human factors expert available for consultation throughout all design phases. In these cases, non-human-factors engineers could derive value from a tool that locates relevant human factors design resources, and guides them through conducting simpler, formative human factors evaluations to gather feedback earlier in the process. The challenge for the design engineer is in finding the appropriate human factors design guidance relevant to a specific project.

Posted in: Briefs, Software, Finite element analysis, Human factors, Systems engineering
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RAYGUN Fast Generic Geometry Raycasting Tool

When performing spacecraft simulations, developers sometimes need to feed the simulation with a distance between two objects along a certain direction vector. For example, if a spacecraft is approaching an asteroid and needs to simulate a laser rangefinder, the simulation would need to detect what part of the asteroid the laser would intersect, and then calculate the distance from the rangefinder to the surface. For an asteroid with a very complex geometry, the search for the intersecting triangle can be very costly in terms of compute time. This scenario presented itself with the MMSEV spacecraft simulation approaching the asteroid “Itokawa.”

Posted in: Briefs, Software, Computer simulation, Mathematical models, Spacecraft
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