20 août 2019 | International, Autre défense

A robot as slow as a snail ... on purpose

By: Kelsey D. Atherton

Snails and slugs are so commonplace that we overlook the weirdness of how they move, gliding on a thin film across all sorts of terrain and obstacles. Popular imagination focuses on how slow this movement is, the snail defined by its pace, but it is at least as remarkable that the same mechanism lets a snail climb walls and move along ceilings. The movement is novel enough that there is now a snail-inspired robot, sliding across surfaces on an adhesive membrane, powered by a laser.

The snail robot, produced by a joint research team at the University of Warsaw Poland, together with colleagues from Xi'an Jiaotong-Liverpool University in Suzhou, China, created a centimeter-long robot powered by light. The research, published July in Macromolecular Rapid Communications, sheds new insight on how animals move in the wild, and on how small machines could be built to take advantage of that same motion.

Why might military planners or designers be interested in snail-like movement? The ability to scale surfaces and cling to them alone is worth study and possibly future adaptation. There's also the simple efficiency of a creature that maneuvers on a single, durable foot.

“Gastropods' adhesive locomotion has some unique properties: Using a thin layer of mucus, snails and slugs can navigate challenging environments, including glass, polytetrafluoroethylene (PTFE, Teflon), metal surfaces, sand, and (famously) razor blades, with only few super-hydrophobic coatings able to prevent them from crawling up a vertical surface,” write the authors. “The low complexity of a single continuous foot promises advantages in design and fabrication as well as resistance to adverse external conditions and wear, while constant contact with the surface provides a high margin of failure resistance (e.g., slip or detachment).”

Snails can literally move along the edge of the spear unscathed. Surely, there's something in a robot that can do the same.

The small snail robot looks like nothing so much as a discarded stick of gum, and is much smaller. At just a centimeter in length, this is not a platform capable of demonstrating much more than movement. The machine is made of Liquid Crystalline Elastomers, which can change shape when scanned by light. Combined with an artificial mucus later formed of glycerin, the robot is able to move, climb over surfaces, and even up a vertical wall, on a glass ceiling, and over obstacles, while it is powered by a laser.

It does all of this at 1/50th the speed a snail would.

This leaves the implications of such technology in a more distant future. Imagine a sensor that could crawl into position on the side of a building, and then stay there as combat roars around it. Or perhaps the application is as a robot adhesive, crawling charges into place at the remote direction of imperceptible light. Directing a robot into an unexpected position, and having it stay there with adhesive, could be a useful tool for future operations, and one that would be built upon research like this.

The robot may be comically slow now. The pace of the technologies around it is not.

https://www.c4isrnet.com/unmanned/robotics/2019/08/19/do-snail-robots-foreshadow-the-sticky-grenades-of-the-future/

Sur le même sujet

  • US Army needs another year to pick protection system for Stryker

    23 avril 2019 | International, Terrestre

    US Army needs another year to pick protection system for Stryker

    By: Jen Judson WASHINGTON — The U.S. Army plans to take another year to pick an Active Protection System for its Stryker combat vehicle, according to the military deputy to the Army acquisition chief. The service is already fielding the Rafael-made Trophy APS on its Abrams tank and has picked IMI's Iron Fist for the Bradley Fighting Vehicle — both as interim systems until the Army can develop an advanced future system — but it had to go back to square one when its attempt to outfit Stryker with Herndon, Virginia-based Artis LLC's Iron Curtain system failed. The Army put out a request for possible systems to be qualified as an interim solution on the Stryker. Officials ultimately chose a Rafael and DRS team and a Rheinmetall and UBT team to participate in a live-fire rodeo last November to see if either system might work. But while it was believed a decision would come soon after, Lt. Gen. Paul Ostrowski testified at an April 2 Senate Armed Services Airland Subcommittee hearing that it would take another year to make a decision. “We have two companies that are in the process of competing for [APS on Stryker]. One is a venture between ... Rafael and DRS and the other is Rheinmetall and UBT, so we are in the process of going through that,” Ostrowski said. “It's going to take about a year, quite frankly, in order to put those systems on the vehicles, characterize them and make a determination as to whether or not to move forward with either one of the two vendors.” Ostrowski added the service had asked each team to provide blueprints and to build their non-developmental APS systems to fit on Stryker. “They are in the process of doing that build,” he said. “And once the build is put on the vehicle, it's then a matter of testing in order to ensure that it works,” Ostrowski said, which is not unlike the process the Army went through to characterize and qualify APS systems on both Abrams and Bradley. Israeli company Rafael and DRS submitted its Trophy VPS — a lighter version of Trophy — for the rodeo. Germany-based Rheinmetall partnered with Unified Business Technologies, based in Michigan, and submitted its Active Defense System — now renamed StrikeShield. During the rodeo, participants did not perform a full installation of their systems on the vehicle. Instead, they set up test rigs in front of Strykers or hung their system off a Stryker in the evaluation. Following the rodeo, the idea was to select one, possibly two systems, to begin some sort of installation characterization on a platform deemed most appropriate for the APS system, Col. Glenn Dean, the Army's Stryker program manager who is also in charge of the interim APS effort, told Defense News in October 2018. Meanwhile, Ostrowski said the Army bought 88 Iron Fist systems for Bradley in 2019 and planned to buy another 36 in the FY20 budget. The service is on a path to field four brigades of Abrams with Trophy by FY21. The Army is also developing its own Modular Active Protection System, which is seen more like a digital integrated backbone that will be designed with an open-system architecture so that vendors can bring radars, optical sensors and hard- or soft-kill effectors and plug them in, according to Ostrowski. The important thing is “to get a capability out there first. . . . Now it's just a matter of moving beyond that,” he said. https://www.defensenews.com/land/2019/04/02/us-army-needs-another-year-to-pick-protection-system-for-stryker/

  • European nations team up to buy Patriot missiles in $5.5 billion deal

    3 janvier 2024 | International, Terrestre

    European nations team up to buy Patriot missiles in $5.5 billion deal

    If all options are exercised, the four states will procure a joint quantity of up to 1,000 Patriot Guidance Enhanced Missiles.

  • Trump announces $3B defense deal with India

    26 février 2020 | International, Aérospatial, Naval, Terrestre, C4ISR, Sécurité

    Trump announces $3B defense deal with India

    By: The Associated Press NEW DELHI — U.S. President Donald Trump announced Tuesday that India has signed a deal to purchase more than $3 billion of advanced military equipment, including helicopters. The announcement comes as the president visits with Indian Prime Minister Narendra Modi in the Asian nation. Trump also said the two leaders made progress on what he describes as a “comprehensive trade deal" after bilateral talks. Modi, meanwhile, said the two had a productive exchange on issues including defense cooperation, energy and technology, adding that talks will continue. He also said that he and Trump have now met five times over the past eight months, noting that ties between the two nations is the “most important partnership of the 21st century." https://www.defensenews.com/global/asia-pacific/2020/02/25/trump-announces-3b-defense-deal-with-india

Toutes les nouvelles