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SIRE: A MIMO Radar for Landmine and IED Detection

Low-frequency ultra-wideband (UWB) radar has garnered attention for the detection of landmines and improvised explosive devices (IEDs) in recent years. The low frequencies used by these radars provide the necessary ground penetration capabilities for detection, and the wide bandwidth signals used are necessary for range resolution. Cross-range resolution that depends on the size of the antenna aperture can be improved by generating a synthetic aperture. Typical airborne synthetic aperture radars (SAR) that can provide high resolution in cross range are not practical for this problem due to cost limitations.

Posted in: Briefs, Aerospace, Defense, Radar, Hazards and emergency management, Protective equipment, Military vehicles and equipment
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Multi-Temporal Analysis of Underbody IED Theater Events on Ground Vehicles

Modeling and simulation were used to analyze the effects of underbody blasts on moving vehicles.

Recently, modeling and simulation (M&S) engineers have made impressive strides in improving ground vehicle reliability and soldier safety. This work involved live-fire testing and evaluation (LFT&E) of the effects of underbody improvised explosive device (IED) blasts on moving ground vehicles. A multi-fidelity, multi-temporal M&S methodology was developed and successfully applied towards reconstruction of theater IED events.

Posted in: Briefs, Aerospace, Defense, Information Technology, Failure analysis, Crashworthiness, Impact tests, Military vehicles and equipment
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Blast Mitigation Seat Testing

Blast energy-attenuation (EA) seats, although not new to the market, have not been fully tested with respect to energy attenuation capability and the resulting effects on occupant protection. The Ground Systems Survivability (GSS) Interiors Seat Team tested and evaluated EA seats over a one-year period using a drop tower test method.

Posted in: Briefs, Aerospace, Defense, Seats and seating, Protective equipment, Safety testing and procedures, Test equipment and instrumentation
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Blast-Induced Acceleration in a Shock Tube

High-fidelity simulation of blast flow conditions can aid in developing strategies to mitigate blast-induced brain injury.

The prevalence of blast-induced traumatic brain injury (bTBI) has prompted an urgent need to develop improved mitigation strategies and advance medical care targeting casualties with bTBI. Despite considerable effort, the basic mechanisms of blast-induced brain injury are still undefined. Based largely upon computational modeling, several candidate mechanisms of nonimpact bTBI have been identified and include head acceleration. This work hypothesizes that explosion flow conditions can cause head acceleration sufficient to injure the brain, and that these inertial forces combine with other injury mechanisms to yield bTBI.

Posted in: Briefs, Aerospace, Defense, Medical, Computer simulation, Diagnosis, Medical equipment and supplies, Head injuries, Occupant protection
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DPA Countermeasures — Theory vs. Practice

The Threat

In today’s interconnected world, the information that we generate, store, transmit, and receive has become a valuable commodity. We have increasingly turned to cryptography as a tool to protect the confidentiality and integrity of this information, but we read almost daily about those protections being defeated. Skilled practitioners can often successfully mount attacks using only very modest resources to break unprotected devices. Attacks on FPGA bitstream encryption, as often reported in the open literature, represent significant examples of the DPA (Differential Power Analysis) threat for the aerospace and defense community.

Posted in: Articles, Aerospace, Defense, Cryptography, Cyber security, Data management
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A Hardware-Centric Approach to Countering Side-Channel Threats

From laptops and mobile devices to cars and airplanes, we are seeing near-daily threats to the systems and devices we use. Systems being used and deployed in the aerospace and defense industry are facing the same problem. As their complexity has increased, so has their attack surface, making them increasingly vulnerable to security threats. There has also been substantial growth in malicious, state-sponsored organizations targeting defense systems that are adept at discovering vulnerabilities, and using them to compromise the integrity of systems and exfiltrate sensitive information.

Posted in: Articles, Defense, Computer software / hardware, Cyber security, Military vehicles and equipment
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Optimizing Thermal Management to Meet SWaP-C Requirements

As defense systems continue to shrink, corresponding thermal management concerns expand exponentially. Designers have learned that overheating can be the downfall of even the most well-designed systems. Suppliers of today’s box-level systems continue to make strides in reducing the size, weight and power (SWaP) of these systems to meet mil-aero deployment demands. However, smaller systems may be more difficult to cool, adding an additional design mandate to keep the system within specified heat parameters, making thermal management that much more important in meeting environmental deployment specifications. Therefore, optimized cooling techniques need to be employed to meet SWaP-C (Size, Weight, Power and Cooling) needs that are now a vital part of the development process.

Posted in: Articles, Defense, Thermal management, Cooling, Military aircraft, Military vehicles and equipment
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Fighting for Life in Military Markets

Visits to the Seville headquarters of Airbus Defence & Space (Airbus DS) have often reflected stormy prospects for the company’s large-capacity A400M Atlas transport, which has suffered cost increases, delivery delays, technical issues, and order losses.

Posted in: Articles, Defense, Flight tests, Military aircraft
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Clamoring for More Entertainment

Consumer expectations for information and entertainment are creating big challenges for airlines that need to provide Internet access while providing inflight services that mirror what’s available in the home and office.

Posted in: Articles, Aeronautics, Defense, Infotainment systems, Vehicle occupants, Displays, Commercial aircraft, Satellites
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Cellular Satellites: Joint Communications with Integrated Acquisition

It’s a familiar image: a soldier crouching with a radio next to a spidery antenna pointing skyward to reach a distant satellite. But that view of military communications is on the verge of change, being replaced by troops rapidly exchanging data while moving seamlessly around the battle space.

Posted in: Articles, Defense, Satellite communications, Defense industry, Military vehicles and equipment
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