New power steering concept uses variable displacement pump

A new electrohydraulic power steering system uses pump displacement control, eliminating throttling losses associated with hydraulic control valves by controlling the displacement of a variable displacement pump. Read more at http://articles.sae.org/13281.

Posted in: Articles, News, Aerospace, Defense

Software-Designed System Improves Wireless Test Speed and Coverage

As wireless standards become more complex, the number of operational modes for these devices increases exponentially. As progression continues to the latest WiFi standard, new modulation schemes, more channels, more bandwidth settings, and additional spatial streams are added. Additionally, characterizing WLAN transceivers is especially challenging when faced with thousands of independent operational gain settings.

Posted in: Application Briefs, Aerospace, Defense, Design processes

Fully Autonomous Unmanned Vehicles

Lockheed Martin
Bethesda, MD

Lockheed Martin, in collaboration with the U.S. Army Tank Automotive Research, Development and Engineering Center (TARDEC), successfully conducted a fully autonomous resupply, reconnaissance, surveillance and target-acquisition demonstration using its Squad Mission Support System (SMSS) unmanned ground vehicle, K-MAX unmanned helicopter and Gyrocam optical sensor.

Posted in: Application Briefs, Aerospace, Defense, Unmanned aerial vehicles

Unmanned Demonstrator Flight Control Systems

North Atlantic Industries
Bohemia, NY

North Atlantic Industries (NAI) has been chosen by Lockheed Martin Skunk Works® to provide navigation system solutions for the Aerial Reconfigurable Embedded System (ARES) vertical takeoff and landing (VTOL) demonstrator. Vehicle management computer (VMC) and actuator interface unit (AIU) requirements were met utilizing NAI’s commercial-off-the-shelf (COTS) SIU6 chassis.

Posted in: Application Briefs, Aerospace, Defense, Flight control systems, Unmanned aerial vehicles

Autonomous Black Hawk Helicopter

Sikorsky Aircraft Corporation
Stratford, CT

Sikorsky Aircraft, a subsidiary of United Technologies Corp., is developing its first product to feature Matrix™ Technology by converting a retired UH-60A Black Hawk helicopter into an optionally piloted variant capable of a wide spectrum of missions. With the autonomous Black Hawk, Sikorsky plans to build on the success of its Matrix Technology and Manned/Unmanned Resupply Aerial Lifter (MURAL) autonomy programs to deliver a new level of mission flexibility to combat and logistic planners. The product will integrate autonomy and advanced fleet management technology with refurbishment experience to provide a cost-effective, dependable and sustainable system.

Posted in: Application Briefs, Aerospace, Defense, Autonomous vehicles, Rotary-wing aircraft

SRW Radio System

Thales Defense & Security
Clarksburg, MD

Thales Defense & Security, Inc. has been awarded an Indefinite Delivery/Indefinite Quantity (IDIQ) contract by the U.S. Army for its Soldier Radio Waveform Appliqué (SRW A) radio system: the AN/VRC 121 Vehicle Integrated Power Enhanced Rifleman, or VIPER.

Posted in: Application Briefs, Aerospace, Defense, Radio equipment

Alleviating Memory and Cache Contention in Safety-Critical Applications

In safety-critical systems, the ability to guarantee that safety-critical tasks have sufficient time to execute is key for system integrity and safe operation. A big challenge facing developers of safety-critical software applications is managing the shared resources of memory and cache to minimize worst case execution times (WCET). On-chip cache allows the processor to run at on-chip memory bus speeds and increases overall compute power when executing from the cache. However, task switching and competition among multiple cores can degrade cache performance and have dramatic impacts on WCET. Benchmarks demonstrate that WCET can be 3 times higher than average-case execution time (ACET) on single-core processors, up to an order of magnitude higher or more on multicore processors.

Posted in: Articles, Aerospace, Aviation, Defense, Computer software / hardware, Safety critical systems