27 août 2020 | International, Aérospatial
Imagine asmall aerial drone navigating a field with electrical power lines. How will it see them? More importantly how will it avoid this significant obstacle in its flight path?
At the U.S. Army Combat Capabilities Development Command's Army Research Laboratory, researchers developed a novel sensor and software application to detect and avoid energized power lines in the vicinity of unmanned aerial system, or UAS. The goal is to provide autonomous systems sufficient time and distance to react, avoid wires and navigate follow-on maneuvers.
Army researcher David Hull developed the innovative approach using a unique configuration of field and 3-D sensors, in conjunction with low-power processing methods. This resulted in detecting power lines and informing the device's autopilot to prevent collision with the wires.
This method allows UAS equipped with these to use smaller, lower power and lower cost sensors to detect the location and Poynting vector (i.e. the directional energy flux density) of nearby power lines. This allows the UAS to autonomously avoid or navigate alongside the detected power lines.
While existing wire-detection and wire-avoidance technologies that use radar and/or optical sensors have had commercial success, they are known to be expensive, bulky, and power-intensive with technical limitations. The detection algorithm developed at the lab will result in size, weight, power and cost reduction.
By combining both sensing modalities in one sensor, Army researchers estimated the direction of power flow, something no traditional sensor can do, Hull said.
The lab recently announced a patent license agreement with Manifold Robotics, a startup company based in New York, who will produce the new technology for drone-based commercial applications.
Engineers and drone experts at Manifold Robotics said they intend to create a drone-based system that will detect power lines at a distance and determine their precise location to enable safe navigation. They said this will overcome the factors that limit the efficacy of drones in the vicinity of power lines and unleash their full potential for autonomous power line inspection as well as other Beyond Visual Line of Sight operations.
From a military perspective, UASs are increasingly used by Soldiers for a variety of missions. In many cases, these drones must successfully operate in urban environments with a high number of power lines in and around the area.
The development goal is to see significant improvement in the safe usage of aerial drones in close proximity to power lines and power grids. Researchers said they believe the licensed Army technologies will enable commercial and military drones to detect power lines at a greater distance. Additionally, the technology is expected to accelerate the development of drone applications such as power line inspection systems and freight delivery drones.
https://uasweekly.com/2020/08/25/army-researchers-develop-breakthrough-sensors-for-small-drones/
15 avril 2024 | International, Terrestre
Missile Defense Agency has chosen Lockheed Martin to build the Next-Generation Interceptor that will replace current ones in its homeland defense system.
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The European Detect and Avoid System is meant to ensure unmanned and manned aviation can co-exist safely in the same airspace.
3 septembre 2019 | International, C4ISR
By BARRY ROSENBERG WASHINGTON: Overshadowed by the dispute with DoD's planned single-award JEDI cloud contract is another multi-billion-dollar single-award cloud contract awarded today that will actually determine the software that military personnel and civil servants use every day. Under the $7.6 billion 10-year Defense Enterprise Office Solutions (DEOS) cloud contract, the Pentagon will use Microsoft productivity tools such as word processing, spreadsheets, email, collaboration, file sharing, and storage — Office 365. Those applications presently reside mostly on legacy desktop computers, and will transition to a cloud-based solution across all military services. The result should be improved cybersecurity, for one thing. “The notion is that if you have it professionally and centrally managed it should be better patched and configured than having hundreds of individually managed servers,” said David Mihelcic, former chief technology officer at the Defense Information Systems Agency (DISA) and now a consultant with DMMI. “This seems reasonable, but I don't think there is any cyber magic in DEOS either.” The joint General Services Administration/Defense Department DEOS blanket purchase agreement was awarded to CSRA (acquired by General Dynamics in April 2018 for $9.7 billion) and its subcontractors Dell Marketing (a wholesale distributor of computers, peripherals, and software) and Minburn Technology (a value added reseller that specializes in Microsoft enterprise software agreements). The award includes a five-year base period with two two-year options and one one-year option. “DOD's cloud strategy includes both general purpose and fit-for-purpose clouds (and) DEOS is a great example of a fit-for-purpose cloud that supports our multi-cloud strategy,” said DOD Chief Information Officer Dana Deasy in a statement. “DEOS will streamline our use of cloud email and collaborative tools while enhancing cybersecurity and information sharing based on standardized needs and market offerings. “The journey to the cloud has been, and will continue to be, an iterative learning process. All lessons learned from pilot programs and the department's early cloud adopters have been rolled into this solution. DEOS takes advantage of technical, security and contractual lessons from these ongoing pilots, while military services are leveraging them to assess the readiness of their infrastructure to support migration to DEOS.” DEOS includes voice, video, and text collaboration capabilities, which the DoD already has with capabilities under enterprise services like: Defense Collaboration Services (DCS), which provides secure web conferencing and instant messaging services on the Non-secure Internet Protocol Router Network (NIPRNet) and Secure Internet Protocol Routing Network (SIPRNet), and Extensible Messaging and Presence Protocol (XMPP) chat. “Will it be an improvement over the current capabilities? I guess we will see,” said Mihalcic. “I can't say I found the collaborative capabilities of O365 better than what we had in DoD.” While DEOS on the surface appears to provide a back-office function, it can also be considered a weapon system given that it will provide common enterprise applications at local base, post, camp, and station levels — including deployed and afloat organizations — over the sensitive but unclassified NIPRNet and the secret SIPRNet, to include operations in Denied, Disconnected, Intermittent, and Limited Bandwidth (D-DIL) environments. “I would say almost certainly (DEOS is a warfighting capability), especially the SIPR instance,” said Mihelcic. “DoD uses email, chat, and DCS collaboration in support of warfighting today and this will now take on those needs. “As for DIL environments, DISA had threshold requirements for deployable instances in the draft RFP. The vendor most likely will satisfy with existing MS Exchange and Sharepoint software on deployable servers. To be honest, I think that most tactical units, including deployed Marines and Navy afloat, will stick with what they have.” https://breakingdefense.com/2019/08/dod-office-functions-move-to-cloud-in-multi-billion-dollar-contract/