MEMs

MicroTCA Ecosystem

VadaTech (Henderson, NV) has released a complete ecosystem of boards and chassis in the MicroTCA architecture that is conduction-cooled. Designed for rugged applications, the products include air transport racks (ATR), MicroTCA carrier hubs (MCH), power modules, and advanced mezzanine cards. Compliant to MicroTCA.3 (Hardened Conduction-Cooled MicroTCA) specification, the boards and chassis come in various sizes and formats.

The MCH, which acts as a shelf controller, features a 400 MHz RISC CPU for high performance and low latency. The power modules provide true hot- swappability in a dual 10-36V input and outputs of up to 800W. They also have dual Intelligent Platform Management Interface (IPMI) and two banks of 256K flash for redundancy. Several of VadaTech’s advanced mezzanine cards (AMCs) are in the conduction-cooled format. The company is also able to modify standard AMCs to ruggedized versions with wedge locks.

Posted in: Products, Products, Electronics & Computers
Read More >>

XMC Controller/Adapter

Technobox, Inc. (West Berlin, NJ) has introduced a new SATA-based storage solution in its 6183 Dual CFast XMC Adapter. The 6183 accommodates two CFast devices – either the Type 1 or 2 – with one affixed to an on-board site and the other removable via the front panel port. Data movement between each CFast device and the internal 1X PCIe bus is controlled by a Silicon Image Sil3132 bridge. The bridge supports two SATA Gen2 interfaces at 3.0 GBytes/s.

On-board BIOS, loaded in flash memory, provides boot up configuration for the Sil3132. The bridge retrieves the stored configuration data via an I2C interface. Two LEDs on the front panel provide activity status for the front panel and onboard CFast cards. Another four LEDs on the card give an indication of activity for each device.

A retention mechanism is included to prevent accidental removal of the front panel device. The retainer also functions as an interlock for the 6183 hot swap feature. .

Posted in: Products, Products, Electronics & Computers
Read More >>

DDS Function Generator

Saelig Company, Inc. (Fairport, NY) has introduced the TG1006 - a DDS-based 1mHz to 10MHz function generator that, unlike other digital generators, can be operated over any frequency range using analog control in addition to numeric or spin-wheel frequency entry. The quasi-analog frequency control can rapidly sweep the frequency between preset limits, which is difficult to do with most digital function generators.

The TG1006 Function Generator can produce waveforms between 0.001Hz and 10MHz with a resolution of six digits, and with a one-year stability of better than 10ppm. Up to ten frequencies can also be stored in memory for preset test procedures. The output amplitude is variable between 5mV and 20V pk-pk from a source impedance of 50 ohms or 600 ohms. The LCD display shows frequency and amplitude or offset simultaneously. For accurate frequency selection, precise frequencies can be entered directly from the numeric keypad in Hz, kHz or MHz.

Posted in: Products, Products, Electronics & Computers
Read More >>

Embedded Radios

Specialized wireless transceivers and radio modems from Ritron (Carmel, IN)provide OEMs and Integrators with wireless connectivity and COTS convenience in a compact, cost-effective package. Direct modulation with low distortion and low group delay results in a low bit-error-rate (BER) for enhanced system integrity and reliability. The Swift Lock™ synthesizer-loading algorithm reduces unit turn-on-time to less than 10ms or high-speed data throughput, and Controlled Envelope™ keying reduces adjacent channel “keyclicks”, resulting in spectrum-friendly operation.

All models meet the 2013 FCC narrowband mandate. All components are placed on the top side of a single PCB for mechanical rigidity and increased protection against damage. Narrow band (12.5 kHz) and Very narrow Band (6.25 kHz) models available.

Posted in: Products, Products, Electronics & Computers
Read More >>

High-Resolution, Measurement-Based, Phase-Resolved Prediction of Ocean Wavefields

Given remote and direct physical measurements of a realistic ocean wavefield, the goal of this work was to obtain a high-resolution description of the wavefield by integrating the measurements with phase-resolved wave prediction models including realistic environmental effects such as wind forcing and wave breaking dissipation. The measurements necessary for achieving this reconstruction were guided, and the validity, accuracy, and limitations of such wavefield reconstructions were addressed.

Posted in: Briefs, Physical Sciences, Measurements, Simulation and modeling, Water
Read More >>

Measuring Impact Damage to Toughened CFRP Laminates with Time Domain Reflectometry

Laminated Carbon Fiber Reinforced Polymer (CFRP) composites are very effective in weight saving in aeronautical structural components. For these laminated CFRP structures, it is difficult to detect damage such as delamination, matrix cracks, and local fiber breakages caused by low-velocity impact loading because these damages are difficult to detect from the outside of the structure. This difficulty of inspection of the laminated CFRP structures demands the development of automatic monitoring or damage detection systems.

Posted in: Briefs, Physical Sciences, Measurements, Composite materials, Lightweight materials
Read More >>

Testing Mechanical Properties of Polymer-Based Multi- Phase Particulate Composites

Polymer composites comprised of metallic particles distributed throughout a contiguous polymer matrix can often be modified to produce advanced composites that exhibit multifunctional characteristics. The properties of the particulate composites often depend on varying particle size, loading fractions, particle type, and the adhesion between the particulate and the matrix. Studies have shown that particle size, shape, and concentration, and properties of the constituents can affect mechanical properties. This work compared aluminum and nickel particles in PMMA thermoplastic prepared by injection molding, with the same particles in epoxy prepared in a cast-cure process.

Posted in: Briefs, Physical Sciences, Composite materials, Test procedures
Read More >>

Humanlike Articulated Robotic Headform for Respirator Fit Testing

The testing of individual respiratory protection (IRP) devices is now accomplished with panels of human wearers. Historical at tempts to simulate the human face and head have been unsuccessful for a variety of reasons that include imprecision in reproduction of facial dimensions and unrepresentative textures of the surfaces applied to headforms.

Posted in: Briefs, Physical Sciences, Human factors, Medical equipment and supplies, Robotics
Read More >>

MISRA C:2012

For C programmers working on safety- critical applications, following restrictions and guidelines to ensure safe-coding practices can be painful. Features of the language designed to make your work easier, more efficient, or provide work-arounds for obstacles are often just the features that the guidelines disallow. However, whether for avionics or in the midst of battle, a problem with the software is the last thing needed. The risks prohibit taking chances.

Posted in: Articles, Aerospace, Software, Computer software / hardware, Safety critical systems, Regulations, Risk management
Read More >>

Armor Kits for Heavy Trucks

Over the last several years, the Army has initiated and implemented a Long Term Armor Strategy (LTAS). The LTAS provides modular armor protection for vehicles that vary dependent upon threat levels. The B-Kit consists of both transparent armor and opaque armor and provides a higher level of protection for the troops. They can be readily stored, applied, or removed by troops in the field per mission requirements.

Posted in: Application Briefs, Operator protective structures, Heavy trucks, Military vehicles and equipment
Read More >>