SWORD Simulation Software

MASA Group, a developer of Artificial Intelligence (AI)- based Modeling & Simulation (M&S) software for the defense, public safety, emergency management, and serious games markets, has launched SWORD 5.0, the latest version of MASA’s automated, aggregated constructive simulation software for training and analysis.

Posted in: Application Briefs, Defense, Computer simulation, Computer software / hardware, Defense industry, Emergency management

Telescoping Poles

U.S. Army and Marine troops have cultivated a creative, lifesaving technology out of heavy-duty telescoping poles. The CMD fiberglass telescoping push/pull rods, normally used for cable and wire management applications, are being modified by some U.S. troops deployed in Afghanistan to create a special tool that effectively locates, digs up, and disables deadly improvised explosive devices (IEDs).

Posted in: Application Briefs, Defense, Glass fibers, Hazards and emergency management, Protective equipment, Military vehicles and equipment

Rugged Processors and Ethernet Switches

GE To Supply Subsystems For Scout SV Ground-Based ISTAR Platform

GE (Towcester, UK) will be supplying General Dynamics UK with subsystems required for the Demonstration Phase of the Scout Specialist Vehicle family of platforms being designed for the British Army. The Scout SV family of platforms will deliver a step change in ground-based ISTAR (Intelligence, Surveillance, Target Acquisition and Reconnaissance) capability. It is a purpose-designed groundbased intelligence platform with an array of high-performance sensors, coupled with the latest (20 Gbits/second) Gigabit Ethernet intelligent open architecture. This will enable it to capture, analyze, manipulate and store over 6 TeraBytes of intelligence data, including a vast array of still and moving images, and to share this intelligence in real-, or very-near-real-time, depending on requirements. Thanks to this capability, Scout SV’s crew will be able to provide commanders with better decision-making support material than that currently available only from airborne ISTAR platforms or UAVs. Data will be readily passed to other secure C4I systems, including those of US and other NATO allies.

Posted in: Application Briefs, Computer software / hardware, Data acquisition and handling, Surveillance, Military vehicles and equipment

Creating a Phased Array Radar for Avalanche Imaging

Avalanches pose a significant threat to human life and settlements, so studying them is key to formulating risk zones. Previously, validating models in order to predict avalanche behavior was limited by a lack of high-quality field data. Radar sensors can be used to gather field data, but in their current form, they only provide single-dimension range measurements. The transmitter power also limits them to a range resolution in the order of 50 m, which is too coarse to provide a true representation of the avalanche dynamics.

Posted in: Application Briefs, RFM Catchall, Imaging, Radar, Terrain

Wheel Force Transducer for Field Testing

This project endeavors to develop, validate, and calibrate cost-effective field test equipment for measuring tire characteristics on vehicles while driving off-road. The four wheel force transducers are designed for use on the High Mobility Multipurpose Wheeled Vehicle (HMMWV or Humvee).

Posted in: Briefs, Physical Sciences, Wheels, Test equipment and instrumentation, Off-highway vehicles and equipment

Thermal Mechanical Fatigue Crack Growth Testing

Turbines in aircraft turbojet engines are being subject to increasingly higher temperatures to improve fuel efficiency. High turbine efficiency requires the ability of turbine blades to withstand gas temperature of the order of 1350 to 1550 °C. In polycrystalline materials, these increased temperatures would cause creep strains along grain boundaries that would be unacceptable. Even single-crystal materials must be pushed to their limits to insure that engine performance is maximized. Airfoils in modern gas turbine aircraft use a systems approach for cooling to achieve required component life. There are three basic components to these systems: a cast nickel single-crystal superalloy in combination with thermal barrier coatings, and a sophisticated cooling scheme consisting of intricately designed channels and holes through the core and surface of the airfoil.

Posted in: Briefs, Physical Sciences, Fatigue, Turbojet engines, Test procedures, Thermal testing

Evaluation of Three Extremity Armor Systems

The US Marine Corps and the US Army have been engaged in efforts to evaluate improved body armor, including armor to protect the extremities. These efforts are focused on both body armor performance (i.e., ballistic protection) and armor effects on the physical performance of personnel (e.g., body flexibility, mobility, and agility).

Posted in: Briefs, Physical Sciences, Kinematics, Defense industry, Protective clothing, Military vehicles and equipment

Low-Power Distributed Jammer Network

The Distributed Jammer Network (DJN) is composed of a large number of tiny, low-power jammers, which are distributed inside a target network and emit radio energy to disrupt its communications. Recent advancement in microelectromechanical system (MEMS) technology makes it possible to make jammers sufficiently small that a DJN can take the form of a dust suspending in the air, thus the name Jamming Dust. Miniaturization of jammers should be less challenging than that of wireless sensors since jammers just emit noise signal without requiring complex modulation, filtering, and other signal processing functions. Therefore, new miniature devices such as nanotube radio may find their first application in jamming dust.

Posted in: Briefs, Electronics & Computers, Microelectricmechanical device, Radio equipment, Telecommunications

Fundamentals of Metamaterials for High-Power RF Applications

Recent years have seen a burgeoning interest in the physics and applications of metamaterials. Briefly, metamaterials consist of a periodic array of subwavelength structures that produce an electromagnetic response not typically available in nature. Notably, composites of these structures in general exhibit both frequency and spatial dispersion, leading to a rich variety of physical phenomena such as backward wave propagation and a negative refractive index.

Posted in: Briefs, Electronics & Computers, Electromagnetic compatibility, Radio equipment, Composite materials, Materials properties

Thermal Analysis and Microhardness Mapping in Hybrid Laser Welds in a Structural Steel

The concept of combining a laser welding system with a conventional arc welding system (GTAW) was first proposed in order to improve the stability of the laser welding system and to allow greater flexibility in part fit-up. Prior research stated that using a YAG laser at a power of 3 kW, one was able to hybrid laser weld a 4-mm-thick aluminum alloy at a speed of 4 n/min. For a mild steel plate, butt welding at 1 m/min with 5 kW of 6-mm-thick plate was realized. Just as significantly as the weld speed was the ability to hybrid laser weld with gaps up to 1.5 mm in a plate 6 mm thick. The glass metal arc welding (GMAW) laser hybrid process can increase the gap bridging ability, i.e., it appreciably broadens the range of tolerances with regard to edge preparation quality. The arc’s energy input in the hybrid welding process also permits control of the cooling conditions. Via the keyhole, the laser beam brings about easier ignition of the arc, stabilization of the arc welding process, and penetration of the energy deep into the material. The improvement of the energy input leads to a greater welding depth and speed being achieved with the hybrid process compared with individual processes on their own.

Posted in: Briefs, Mechanical Components, Lasers, Welding, Steel, Thermal testing