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Low-Profile AC-DC Power Supplies

Schaefer Inc. (Hopkinton, MA) recently introduced the new low-profile TERa Series of Advanced Thermal Technology AC-DC power supplies. The TERa family offers three output power classes of 700, 1200 and 2000 Watts that are uniquely sealed in a heat conducting potting material. Featuring an ultra-wide temperature range of –50°C to 85°C, these units are designed for easy-to-connect parallel/ series operation if higher power or redundancy is needed.

Posted in: Products, Defense
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600W Programmable Power Supplies

TDK Corporation (Tokyo, Japan) recently added 600W high voltage models to TDK-Lambda’s Z+ series of programmable DC power supplies. This series is now available with output voltages of 0-10, 0-20, 0-36, 0-60, 0-160, 0-320 or 0-650 VDC and with output powers of 200, 400, 600 and 800W.

Posted in: Products, Defense
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Additive Manufacturing

The NanoSteel® Company (Providence, RI) has announced the expansion of its additive manufacturing (AM) material capabilities to support metal 3D printing of complex high-hardness parts and the ability to customize properties layer-by-layer through gradient material design. The company leveraged its 2014 breakthrough in AM wear materials to print a bearing and impeller using the powder bed fusion process. These parts were measured to be fully dense and crack-free, with hardness levels >1000 HV.

Posted in: Products, Defense
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RF Over IP Technology

RT Logic (Colorado Springs, CO), a subsidiary of Kratos Defense & Security Solutions, has released SpectralNet, the only commercially available product that enables the lossless transport of packetized RF over IP networks, over any distance, even in the presence of real world IP network limitations. By digitizing RF signals for transport over IP networks – public or private – in a way that preserves both their frequency and timing characteristics, SpectralNet uniquely restores the RF signals for use at their destination by legacy analog equipment.

Posted in: Products, Defense
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Radiation-Tolerant FPGAs

Microsemi Corporation (Aliso Viejo, CA) has announced availability of its RTG4™ high-speed signal processing radiation-tolerant FPGA family. The RTG4’s reprogrammable flash technology offers complete immunity to radiation-induced configuration upsets in the harshest radiation environments, requiring no configuration scrubbing, unlike SRAM FPGA technology. RTG4 supports space applications requiring up to 150,000 logic elements and up to 300 MHz of system performance.

Posted in: Products, Defense
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Chemical Agent Resistant Coating

Sherwin-Williams (Cleveland, OH) recently announced that MIL-DTL-64159 Type III Chemical Agent Resistant Coating (CARC) Aerosol is now available for touch ups or other small job applications on military vehicles, ground support equipment and rotocraft. The coating provides vital CARC protection for military vehicles in the field, where a scratched or damaged finish coat – or a repair made with a non-CARC coating – may compromise the integrity of a vehicle’s protection and put military personnel at risk.

Posted in: Products, Defense
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Infrared Stereo Calibration for Unmanned Ground Vehicle Navigation

Many challenges still persist in the area of autonomous (and even semi-autonomous) vehicle navigation for unmanned ground vehicles (UGVs). One challenge is in detecting and classifying obstacles for avoidance and path planning. The use of laser-based sensors, such as lidar, has become quite common for assisting in such a task; however, lidar systems may be too expensive for certain applications, and are active, not passive sensors, so they may not be desirable in some missions. Lidar is adversely affected by smoke, dust, fog, and rain. Therefore, the use of passive camera sensors, such as typical color and infrared (IR) cameras, has become an important research topic in UGV navigation.

Posted in: Briefs, Defense, Sensors, Imaging, Optics, Sensors and actuators, Vibration
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Simultaneous Vibration Suppression and Energy Harvesting for a Multifunctional UAV Spar

The goal of this work was to investigate using harvested energy to directly control the vibration response of flexible aerospace systems. Small, lightweight, flexible Micro Air Vehicles (MAVs) operate near flutter, providing both harvesting opportunities and vibration suppression requirements. The possibility that ambient energy might be harnessed and recycled to provide energy to mitigate the vibrations through various control laws was investigated. The goal was to integrate harvesting, storage, control, and computation into one multifunctional structure, and illustrate its benefits.

Posted in: Briefs, Aerospace, Vibration, Unmanned aerial vehicles
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Development and Evaluation of the Stingray Amphibious Maritime Unmanned Ground Vehicle

Every year, the U.S. Navy and Marine Corps conduct thousands of Maritime Interdiction Operations (MIOs) to enforce embargoes, intercept contraband, prevent drug and human smuggling, and fight piracy. These operations are usually conducted by Visit, Board, Search, and Seizure (VBSS) teams using rigid-hull inflatable boats (RHIBs) or helicopters. Key performance parameters were developed for a portable, throwable robot that can best support their missions. This robot can be used for advanced reconnaissance as the team is about to board a target vessel, to assist in compartment clearing, and for inspection of flooded compartments and bilges.

Posted in: Briefs, Defense, Manufacturing & Prototyping, Product development, Autonomous vehicles, Marine vehicles and equipment
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Pushbroom Stereo for High-Speed UAV Navigation in Cluttered Environments

Unmanned aerial vehicles (UAVs) rely on an external motion-capture apparatus that gives the vehicles almost perfect state information at high rates. Major challenges in gathering sensing data necessary for flight are the limited payload, computation, and battery life of the vehicles. Lightweight cameras are a good solution, but require computationally efficient machine vision algorithms that can run within the limits of these vehicles.

Posted in: Briefs, Aerospace, Software, Imaging, Navigation and guidance systems, Unmanned aerial vehicles
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