MEMs

Avionics Cables and Connectors

TE Connectivity (TE) (Berwyn, PA) has developed new cable and connector offerings to support Ethernet data rates. The products handle IEEE 1394, USB, and a range of speeds from 1 GbE through 10 GbE. The TE connectors, which support UAVs, helicopters, missiles, and soldier systems, will include high-speed, small-form-factor circular and rectangular connectors in sizes as small as nanominiature. Termination methods involve mechanical crimp, solder, and high-retention- force removable clamps.

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Bellows Assembly

Servometer® – PMG, LLC (Cedar Grove, NJ) has introduced an athermalization, or “atherm,” temperature-sensitive bellows assembly. The lightweight assemblies have thin-walled, electrodeposited nickel soldered to custom end pieces. The end pieces are filled with a working fluid and then sealed.

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DC/DC Converters

The QMJ Series of DC/DC converters from Contech (Concord, CA), a division of Calex, offers up to 20 Watts of fully regulated output power. The series offers a 4:1 input range with nominal input voltages of 24 VDC and 48 VDC. Single outputs offered are 3.3, 5, 12, and 15 VDC. Dual outputs are ±12 and ±15 VDC.

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MIL-STD-1553 PMC Card

The BU-65596F/M, a MIL-STD-1553 PMC card from Data Device Corporation (Bohemia, NY), uses DDC’s Enhanced Mini-ACE® ASIC core. The BU- 65596F/M incorporates Total-ACE® integrated terminals and includes over 62 million hours of in-service history. The high-MTBF, DO-254-certifiable card has up to 4 MIL-STD-1553 channels and 16 avionics discrete I/O, and is VITA 47 Class V3 rated for rugged environments.

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Digital Oscilloscope

Rigol Technologies (Oakwood Village, OH) has introduced the DS6000 series digital oscilloscope, featuring up to 1 GHz bandwidth, 1.5 GHz bandwidth differential, and single-ended active probes. The digital oscilloscopes use advanced waveform search, visualization, and replay to detect signal and device characteristics.

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Rad-Hard FPGAs

The rad-hard and rad-tolerant reprogrammable Virtex®- 5QV FPGA from Xilinx (San Jose, CA) supports specified Total Ionizing Dose (TID) and characterized Single-Event Effects (SEE). The space-grade field programmable gate arrays are also optimized with embedded MPUs, embedded DSP elements, built-in Ethernet MAC blocks, and high-speed serial connectivity.

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Graphics Processor

AMD (Sunnyvale, CA) has introduced the AMD Radeon™ E6460 discrete graphics processor. With support for up to four simultaneous displays, the E6460 GPU enables an immersive experience with desktop-level 3D graphics and multimedia features. A 3D graphics engine and programmable shader architecture support Microsoft DirectX® 11 tech nology for graphics rendering. The unified video decoder also provides dual HD decode of H.264, VC-1, MPEG4, and MPEG2 compressed video streams.

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Modern Military Energy Storage Technology

The risk of human casualties associated with fuel convoys, combined with the long-term cost issues of unreliable technologies, has the military exploring greener, more sustainable options with the goal of increasing energy efficiencies, lowering fuel consumption, and lessening the risk of lost lives. Advanced battery technology continues to be validated as a viable solution to lowering fuel demands. For example, today’s advanced energy storage systems can store energy from portable solar arrays to power essential electronic systems at forward operating bases (FOBs) — instead of using a vehicle’s idling engine power or diesel generators — significantly reducing fuel consumption, costs, and risk.

Posted in: Articles, Aerospace, Batteries, Energy storage systems, Military vehicles and equipment
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Choosing a Capacitor for Use as a Switch-Mode Power Supply Filter

Input filter caps need to be able to supply a quick burst of energy and to suppress noise generated in the switch circuit. Important considerations for the input filter cap are ESR, ESL, and ripple current. High CV density is preferred in the input filter caps to reduce board space, although it is more critical for the output filter caps.

Posted in: Articles, Aerospace, Electronic Components, Power Management, Power Supplies, Capacitors, Switches, Parts
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Inside the Navy’s Quiet Water Tunnel Facility

When water flows over an acoustic sensor, non-acoustic pressure fluctuations caused by turbulence can decrease the signal-to-noise ratio and make it difficult to sense incoming acoustic waves. The Quiet Water Tunnel Facility at the Naval Undersea Warfare Center in Newport, RI is a unique test facility capable of investigating these pressure fluctuations and evaluating new and existing technologies aimed at reducing flow noise and drag due to skin friction. These technologies include modifications to the surface itself, such as riblets or compliant coatings, or modifications to the flow, such as suction or injection of water into the boundary layer.

Posted in: Articles, Aerospace, Water, Acoustics, Test facilities, Marine vehicles and equipment
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