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Generic Miniature Airplane for Research and Development

The Air Force Research Laboratory has promulgated the geometrical design of a miniature airplane denoted the Generic Micro Aerial Vehicle (GENMAV). This design is intended to serve as a baseline for analyses of geometrical designs of other micro aerial vehicles (MAVs). As such, the GENMAV design is meant to be distributed openly among organizations engaged in research and development pertaining to MAVs. The need for the GENMAV or a similar standard of comparison has become more acute in recent years because of the increasing interest in the use of MAVs [a subset of uninhabited aerial vehicles (UAVs)] for diverse purposes, especially in military, law-enforcement, and rescue activities.

Posted in: Briefs, Mechanical Components
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Measuring Skin Friction in Complex Flows That Include Shocks

A methodology for measuring skin friction (also known as wall shear) in complex flows typical of those inside supersonic-combustion ramjet (scramjet) engines has been developed. The flows inside scramjet engines are turbulent and include shocks. Because the dynamic pressures of such flows are high, even small skin-friction coefficients can significantly degrade engine performance. Hence, it is desirable to measure skin friction in order to gain better understanding of engine performance and to enable calibration of skin-friction submodels of computational fluid dynamics models used to design scramjet engines. The presence of shocks and the large heat fluxes associated with flows in scramjet engines add to the challenge of measuring skin friction, and the present methodology provides means to meet the challenge. Major elements of the methodology are a generic design for a gauge and techniques for processing the readings of the gauge such that the wall shear at the gauge location can be determined fairly accurately, even when a shock impinges directly on the gauge.

Posted in: Briefs, Physical Sciences
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Miniaturized GPS Controlled-Reception-Pattern Antenna Array

Aminiaturized Global Positioning System (GPS) antenna array is being developed for use on aircraft on which the room available for installation of this or any other equipment is severely limited and there is a requirement for an anti-jamming capability. This miniaturized GPS antenna array is, more specifically, a controlled-reception-pattern antenna array (CRPA), which affords a capability for (1) electronic beam forming to maximize the signals received from GPS satellites and/or (2) electronic null forming to minimize signals received from jamming transmitters or to suppress multipath signals. Heretofore, it has been possible to equip some aircraft with fixed-receptionpattern antenna arrays (FRPAs) but not with CRPAs, which have tended to be larger. It is envisioned that the present development effort will eventually yield anti-jamming GPS CRPAs no larger than the GPS FRPAs now used on military aircraft.

Posted in: Briefs, Physical Sciences
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Biologically Inspired Processing of Image and Sound Data

A report describes progress in a research program oriented toward developing artificial-intelligence capabilities for processing images and sounds in changing environments. This research focuses on extending the state of the art in mid-level processing of visual and auditory signals, following a biologically inspired approach. Developments described in the report are summarized as follows:

Posted in: Briefs, Physical Sciences
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Dual-Core VME Single-Board Computer Delivers Low Voltage

Curtiss-Wright Controls Embedded Computing (Leesburg, VA) offers the SVME/DMV-1901 6U VME single-board computer with the Intel® Core™ Duo processor running at speeds of 1.67 and 2.0 GHz.

Posted in: Products, Products, Electronics & Computers
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PrXMC/PrPMC Module

The TPA-XMC™ PrXMC/PrPMC Module from Themis® Computer (Fremont, CA) provides dual 64-bit processing and flexible high-speed I/O while consuming as little as 15 watts. The energy-efficient module is based on P.A. Semi's PA6T-1682M PWRficient™ Power Architecture-based processor. The TPA-XMC is designed for a wide range of networking, wireless infrastructure, storage, and military/aerospace systems running applications on PowerPC platforms. Eighteen user-configurable serdes lanes enable the TPA-XMC to serve a wide range of high-speed requirements.

Posted in: Products, Products, Electronics & Computers
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IP Core Software for FPGA Chips

SERCOS International (Santa Rosa Beach, FL) has introduced Easy-I/O, a freely downloadable IP core software for low-cost FPGA chips that allows SERCOS III to be integrated into basic I/O slave devices with minimal development and integration effort. To minimize the costs for a slave interface, the functionality of a SERCOS III slave was reduced to a minimum. Thus, the Easy-I/O IP core supports only the SERCOS III realtime and service channels.

Posted in: Products, Products, Electronics & Computers
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SHB Express™ and PICMG® 1.3

Trenton Technology (Atlanta, GA) announces five new SHB Express™ and PICMG® 1.3 backplanes designed to meet the needs of a wide variety of fields including medical diagnostics, military, telecom, and advanced imaging markets. Trenton's BPG6615, BPX6610, BPG6714 and BPX6719 backplane configurations support additional PCIe, PCI-X and PCI card slots.

Posted in: Products, Products, Electronics & Computers
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High-Speed Digitizer

Agilent Technologies Inc. (Santa Clara, CA) has introduced the Acqiris DP1400 high-speed digitizer. Designed in a standard short PCI card format, the compact DP1400 combines data converter ASIC technology with component integration for a reduced power consumption of less than 15 W. It can be used in all standard PCI bus slots and is ideal for test applications including semiconductor component testing, hard disk drive production testing, and industrial non-destructive testing. With the optional SAR mode, the onboard memory is separated into multiple buffers. As data is acquired into one buffer, another can be read out through the 32-bit/66 MHz PCI at up to 250 MB/s. In applications where the total data rate of the acquisition is below the PCI data bandwidth, the Acqiris DP1400 with SAR mode can acquire continuously, missing zero events.

Posted in: Products, Products, Electronics & Computers
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GPU Processors

NVIDA (Santa Clara, CA) has released its new family of NVIDA® Tesla™ processors based on a new graphics processing unit (GPU). The family includes the Tesla™ GPU Computing Processor, which is a computing board that scales to multiple GPUs in a single PC or workstation. It features 128 parallel processors and up to 518 gigaflops of parallel computation.

Posted in: Products, Products, Electronics & Computers
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