6 août 2019 | International, C4ISR

Can a dragonfly teach a missile how to hunt?

By: Jen Judson

WASHINGTON — A computational neuroscientist is studying whether a dragonfly's excellent hunting skills can be replicated in a missile's ability to maneuver and destroy targets midair with better precision.

Dragonflies are vicious little creatures with a hit-to-kill track record of 95 percent, meaning only 5 percent of its prey escapes.

Sandia National Laboratories' Frances Chance is building algorithms that simulate how a dragonfly processes information when intercepting prey, and she's testing them in a virtual environment. So far, the results are promising.

The laboratories are federally funded and focus on national security missions through scientific and engineering research. The project is a yearlong, high-risk, high-gain effort that will wrap up in September, and it is funded by Sandia's Autonomy for Hypersonics Mission Campaign, Chance said.

“I think what is really interesting about insects, in general, is they do something really fast and really well, but they are not particularly smart in the way you or I would think of ourselves as being smart,” Chance told Defense News in a recent interview.

While insects may not be the right fit for studying cognitive capabilities to develop complex artificial intelligence, they are ideal for developing efficient computations for intercept capability. A dragonfly can react to a particular prey's maneuvers in 50 milliseconds, Chance explained. That amount of time accounts for information to cross three neurons in a dragonfly's brain. This indicates the dragonfly doesn't learn how to hunt, but rather the skill is inherent and part of its brain's hard-wiring.

“The challenge then is: Is there anything that we can learn from how dragonflies do this that we can then bring to the next generation of missiles, or maybe even the next-next generation of missiles?” Chance said.

By developing an artificial neural network that mimics a dragonfly's ability to hunt and then applying it to missile capabilities that rely on computation-heavy systems, one could reduce the size, weight and power needed for a missile's onboard computers; improve intercept techniques for targets such as hypersonic weapons; and home in on targets using simpler sensors.

If the model of a dragonfly's neural circuit developed through Chance's research shows enough promise, she would then pass the information to scientists, who would try to directly apply it to weapons systems.

One of the greatest leaps involves adapting an algorithm to handle the speed at which a missile flies. While a dragonfly is fast, it's not nearly as fast as a missile. Animal brains process information significantly slower than a computer, so it's possible computations can be sped up to better align with the speed at which a missile approaches targets.

“The hope is that even if the algorithm isn't wildly successful, you might be able to say something about what you can get away with in terms of what types of capabilities you give the next generation of weapons,” Chance said.

The model she's building is several steps removed from implementation onto a weapon. “I would consider the project complete when we have a viable model — ‘viable' meaning it does interception — and a bonus if it's neurobiologically plausible. There is no reason to force that for this type of research, but only because it doesn't necessarily matter; so something biologically inspired that works I would consider a success.”

https://www.c4isrnet.com/land/2019/08/05/can-a-dragonfly-teach-a-missile-how-to-hunt/

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  • Build a fleet, not a constituency

    12 mai 2020 | International, Naval

    Build a fleet, not a constituency

    By: Bryan Clark and Timothy A. Walton The U.S. Navy's long-awaited award of a contract to design and build a new class of frigates has brought with it calls to dramatically expand the planned class of 20 ships to a fleet of 70 or more hulls. Like recent congressional efforts to build more of today's amphibious ships or destroyers, these recommendations risk putting the Navy on an unsustainable path and could fail to influence Chinese or Russian adversaries the U.S. fleet is intended to help deter. The Navy clearly needs guided-missile frigates. By bringing comparable capability with less capacity, frigates will provide a less expensive alternative to Arleigh Burke destroyers that are the mainstay of today's U.S. surface fleet. Freed of the requirement to conduct almost every surface combatant operation, destroyers would have more time to catch up on maintenance and training or be available to conduct missions demanding their greater missile capacity like Tomahawk missile strikes or ballistic missile defense. However, the frigate's size — less than a destroyer, more than a littoral combat ship or corvette — also limits its ability to support U.S. Navy wartime operations. Frigates like the Franco-Italian FREMM can conduct the full range of European navy operations such as local air defense, maritime security and anti-submarine warfare, or ASW. But the American FREMM variant will not have enough missile capacity for large or sustained attacks like those conducted by the U.S. Navy during the last several years in the Middle East, or like those that would be likely in a conflict with China. And although they could defend a nearby ship from air attack, the planned U.S. frigates could not carry enough longer-range surface-to-air interceptors to protect U.S. carrier and amphibious groups, or bases and population centers ashore. Proponents argue frigates' capacity limitations could be mitigated by buying more of them, better enabling distributed maritime operations and growing naval presence in underserved areas like the Caribbean and Arctic. In a post-COVID-19 employment environment, accelerating frigate construction could also create jobs by starting production at additional shipyards. Although they cost about $1 billion each to buy, the money to buy more frigates — at least initially — could be carried in the wave of post-pandemic economic recovery spending. But after a few years, that spigot will likely run dry, leaving the Navy to decide whether to continue spending about half the cost of a destroyer for a ship that has only a third as many missiles and cannot conduct several surface warfare missions. The more significant fiscal challenge with buying more frigates is owning them. Based on equivalent ships, each frigate is likely to cost about $60 million annually to operate, crew and maintain. That is only about 25 percent less than a destroyer. For the U.S. Navy, which is already suffering manning shortages and deferring maintenance, fielding a fleet of 70 frigates in addition to more than 90 cruisers and destroyers will likely be unsustainable. Instead of simply building more frigates to create jobs and grow the Navy, Department of Defense leaders should determine the overall number and mix of ships it needs and can afford within realistic budget constraints. The secretary of defense recently directed such an effort, which continues despite the impact of the COVID-19 pandemic. This commentary's authors are participating in the study. As recommended in a recent study, instead of buying more frigates to expand the fleet's capacity, the Navy would be better served by adding missile-equipped corvettes like those in European or Asian navies. These ships could carry as many missiles as the Navy's planned frigate but would not incorporate capabilities for area air defense or ASW. The smaller size and reduced capability of corvettes would reduce their sticker price to about one-third that of a frigate, and their sustainment cost to about a quarter that of destroyers. The lower price for corvettes would allow more of them to be built and deployed, where they could team with other surface forces to provide additional missile magazines that could be reloaded by rotating corvettes to rear areas. In peacetime, corvettes would enable the Navy to expand presence and maritime security to underserved regions and provide more appropriate platforms for training and cooperation. Frigates will still be needed, even with a new corvette joining the U.S. fleet. Frigates would replace destroyers in escort operations to protect civilian and noncombatant ships, like supply vessels. They would also conduct maritime security operations in places such as the Persian Gulf or South China Sea, where piracy, trafficking and paramilitary attacks occur. Most importantly, frigates would lead ASW operations, where their towed sonar systems could be more capable than the systems used by current destroyers. Although ASW is an important naval mission, buying more frigates than planned to expand the Navy's ASW capacity is unnecessary and counterproductive. The Navy could gain more ASW capacity at lower cost and with less risk to manned ships by complementing its planned 20 frigates with unmanned systems including fixed sonars like SOSUS, deployable sonar systems that sit on the ocean floor, unmanned surface vessels that tow sonars and trail submarines, and unmanned aircraft that can deploy and monitor sonobuoys or attack submarines to suppress their operations or sink them. The U.S. Navy is at the beginning of a period of dramatic change. New technologies for autonomy, sensing, weapons and networking are enabling new concepts for naval missions at the same time fiscal constraints and pressure from great power competitors are making traditional approaches to naval operations obsolete or unsustainable. The Navy's frigate award is a great start toward the future fleet, but the Navy needs to take advantage of this opportunity and assess the best mix of ships to field the capabilities it needs within the resources it is likely to have. Bryan Clark is a senior fellow at the Hudson Institute, where Timothy A. Walton works as a fellow. https://www.defensenews.com/opinion/commentary/2020/05/11/build-a-fleet-not-a-constituency/

  • Airbus, Dassault, Leonardo : le drone MALE européen sur la piste de décollage

    14 décembre 2018 | International, Aérospatial

    Airbus, Dassault, Leonardo : le drone MALE européen sur la piste de décollage

    Par Michel Cabirol L'Organisation Conjointe de Coopération en matière d'Armement a lancé le 31 octobre un appel d'offres portant sur le développement, la production et la phase initiale de maintien en condition opérationnelle du drone MALE européen. Le drone MALE européen est sur la piste de décollage. Le système européen de drone de moyenne altitude et longue endurance MALE RPAS (Medium Altitude Long Endurance Remotely Piloted Aerial System) a franchi le 22 novembre dernier une nouvelle étape importante avec la réalisation de la revue de conception préliminaire, ont annoncé jeudi les trois industriels Airbus, Dassault Aviation et Leonardo. D'ici le milieu de la prochaine décennie, le MALE RPAS, conçu pour opérer dans l'espace aérien non ségrégué, pourra être déployé dans le monde entier pour des missions de renseignement, surveillance, acquisition de cible et reconnaissance (ISTAR). "Ce succès majeur intervient après le lancement par l'Organisation Conjointe de Coopération en matière d'Armement (OCCAR) le 31 octobre d'un appel d'offres portant sur le développement, la production et la phase initiale de maintien en condition opérationnelle du programme", ont précisé les trois industriels dans le communiqué. Cette nouvelle étape permettra aux nations et aux industriels partenaires de commencer le développement du système avec des spécifications harmonisées et une vision claire de sa conception globale. Surtout, la question du prix va être importante mais pas déterminante pour le lancement du programme s'il y a bien sûr toujours une volonté politique. D'autant que l'Allemagne se serait engagée à prendre à son compte les surcoûts liés à la motorisation du MALE. Mi-2017, les pays partenaires avaient conclu un accord sur la configuration du drone, optant in fine pour un système biturbopropulseur. Résultat, la facture pourrait s'élever à plus de 2 milliards d'euros, soit plus du double de l'estimation d'un projet précédent (1 milliard d'euros). Airbus, maître d'oeuvre Désigné comme futur maître d'œuvre, Airbus Defence and Space coordonnera la réponse industrielle à l'appel d'offres avec les principaux sous-traitants : Airbus Defence and Space, Dassault Aviation SA et Leonardo. Airbus va passer un test grandeur nature, le groupe n'a jusqu'ici pas particulièrement brillé dans la conduite de certains grands programmes militaires, dont il a eu la maîtrise d'oeuvre (A400M, drone SIDM, hélicoptère NH90...). Et plus spécifiquement quand le groupe européen a lui-même dû développer des missions de défense dans ces programmes. Selon le communiqué, cet appel d'offres témoigne de la volonté des nations partenaires (France, Allemagne, Italie et Espagne) de poursuivre le programme "à l'issue d'une phase extrêmement fructueuse d'alignement des exigences et d'une démonstration convaincante de la qualité et de l'adéquation de la conception proposée à l'usage prévu". La revue de conception préliminaire du système conclut avec succèsl'étude de définition de deux ans lancée en septembre 2016 par les nations partenaires. Trois d'entre elles avaient signé en mai 2015 une déclaration d'intention en vue du développement commun d'un système de drone européen MALE, puis l'Espagne a rejoint le programme en 2016. https://www.latribune.fr/entreprises-finance/industrie/aeronautique-defense/airbus-dassault-leonardo-le-drone-male-europeen-sur-la-piste-de-decollage-800954.html

  • Enabling Revolutionary Nondestructive Inspection Capability

    17 juin 2019 | International, Autre défense

    Enabling Revolutionary Nondestructive Inspection Capability

    X-rays and gamma rays have a wide range of applications including scanning suspicious maritime shipping containers for illicit materials, industrial inspection of materials and processes, and medical diagnostic and therapeutic procedures. Current technologies, however, are not ideal. X-rays produce a continuum of energies that limit their inspection and diagnostic performance, and gamma rays can only be produced at specific energies unique to a given radioactive isotope. DARPA today announced its Gamma Ray Inspection Technology (GRIT) program. GRIT seeks novel approaches to achieve high-intensity, tunable, and narrow-bandwidth sources of gamma ray radiation in a compact, transportable form factor that would enable a wide range of national security, industrial, and medical applications. A Proposers Day webinar describing the goals of the program is scheduled for July 8, 2019. “What we're trying to do in GRIT is transform the use of x-rays and gamma rays,” said Mark Wrobel, program manager in DARPA's Defense Sciences Office. “Current sources of gamma rays, like Cobalt-60 or Cesium-137, are not very flexible. They require special licenses to possess and only emit gamma rays at very specific energies. What we desire is a source of very high-energy photons that we can tune to match the application we need. This ranges from more effective detection of illicit cargo, to a more informative medical x-ray.” GRIT aims to provide a source of tunable, pure x-rays and gamma rays from tens of keV (kilo-electron volts) up through over ten MeV (mega-electron volts). Currently, tunable and narrow bandwidth gamma ray sources only exist at highly specialized user facilities best suited for basic research and are not able to support broad practical applications. Shrinking these photon sources to a transportable system is a major goal and challenge of the GRIT program. GRIT technology could make possible a range of new inspection and diagnostic protocols. In medical and industrial radiography, for example, GRIT could enable revealing specific elemental and material content, such as calcium in bones or specific metals in cargo. A typical x-ray only shows differences in density in the object being inspected – whether a piece of luggage at an airport, or an individual at a doctor's office. If successful, a GRIT x-ray source could be tuned to detect and quantify the concentration of specific elements of interest, such as the amount of calcium in a given bone x-ray, enabling radiologists to actually see bone composition. Tuning energy between 10s of keV to over 100 hundred keV would allow detection of specific elements that might be of interest in characterizing novel materials and processes at micron scales. These techniques would be relevant to defense applications including non-destruction inspection of novel additively manufactured materials and alloys for their elemental composition. At energy levels in the MeV range, gamma ray photons have high enough energy to actually interact with the nuclei of atoms. Whereas x-rays work by interacting with the shells of atoms, GRIT would be able to stimulate the nucleus of an atom to bring about an effect called nuclear resonance fluorescence, a sort of “fingerprint” that is unique to each isotope on the periodic table. “With GRIT, you could probe and detect specific isotopes of interest by fine-tuning the photon energy to minimize background noise and take advantage of the nuclear resonance fluorescence phenomenon,” Wrobel said. “Those isotopes could be rare-earth elements of interest or special nuclear materials. To be able to definitively say, ‘Yes, there's highly enriched uranium in this object' and be able to characterize how much is present would be a significant leap forward over our current capabilities.” DARPA is seeking expertise in a range of technologies on the GRIT program including advanced accelerator technology, high-energy laser systems, novel control systems, and new x-ray and gamma ray detector technology. To register for the GRIT Proposers Day webinar, visit: https://go.usa.gov/xmh28. GRIT's focus on new, compact photon sources for inspection complements DARPA's Intense and Compact Neutron Sources (ICONS) program, which is developing compact neutron sources. The two technologies would work in tandem, yielding a very robust inspection capability. Caption: The Gamma Ray Inspection Technology (GRIT) program seeks tunable gamma ray sources for a host of national security, industrial, and medical applications. https://www.darpa.mil/news-events/2019-06-14

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