1 octobre 2018 | International, Naval
U.S. Navy research contract could make complex metal additive manufacturing a reality both in production centers and deep in the field
DENVER, Oct. 1, 2018 /PRNewswire/ -- Today, 3-D printing generates parts used in ships, planes, vehicles and spacecraft, but it also requires a lot of babysitting. High-value and intricate parts sometimes require constant monitoring by expert specialists to get them right. Furthermore, if any one section of a part is below par, it can render the whole part unusable. That's why Lockheed Martin (NYSE: LMT) and the Office of Naval Research are exploring how to apply artificial intelligence to train robots to independently oversee—and optimize—3-D printing of complex parts.
The two-year, $5.8 million contract specifically studies and will customize multi-axis robots that use laser beams to deposit material. The team will develop software models and sensor modifications for the robots to build better components.
Lockheed Martin Metal 3D printer
"We will research ways machines can observe, learn and make decisions by themselves to make better parts that are more consistent, which is crucial as 3-D printed parts become more and more common," said Brian Griffith, Lockheed Martin's project manager. "Machines should monitor and make adjustments on their own during printing to ensure that they create the right material properties during production."
Researchers will apply machine learning techniques to additive manufacturing so variables can be monitored and controlled by the robot during fabrication.
"When you can trust a robotic system to make a quality part, that opens the door to who can build usable parts and where you build them," said Zach Loftus, Lockheed Martin Fellow for additive manufacturing. "Think about sustainment and how a maintainer can print a replacement part at sea, or a mechanic print a replacement part for a truck deep in the desert. This takes 3-D printing to the next, big step of deployment."
Currently, technicians spend many hours per build testing quality after fabrication, but that's not the only waste in developing a complex part. It's common practice to build each part compensating for the weakest section for a part and allowing more margin and mass in the rest of the structure. Lockheed Martin's research will help machines make decisions about how to optimize structures based on previously verified analysis.
That verified analysis and integration into a 3-D printing robotic system is core to this new contract. Lockheed Martin, along with its strong team, will vet common types of microstructures used in an additive build. Although invisible from the outside, a part could have slightly different microstructures on the inside. The team will measure the performance attributes of the machine parameters, these microstructures and align them to material properties before integrating this knowledge into a working system. With this complete set of information, machines will be able to make decisions about how to print a part that ensures good performance.
The team is starting with the most common titanium alloy, Ti-6AI-4V, and integrating the related research with seven industry, national lab and university partners.
About Lockheed Martin
Headquartered in Bethesda, Maryland, Lockheed Martin is a global security and aerospace company that employs approximately 100,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services. This year the company received three Edison Awards for ground-breaking innovations in autonomy, satellite technology and directed energy.
SOURCE Lockheed Martin
19 mai 2024 | International, Terrestre
The 3rd Multidomain Task Force is collaborating with Australia and the U.K. to develop technology like artificial intelligence and machine learning.
20 septembre 2019 | International, Aérospatial
BySommer Brokaw Sept. 19 (UPI) -- Raytheon Missile Systems has been awarded a $25.4 million contract by the Navy for the Tomahawk Weapons System Military Code review and AGR5 kit. The contract, announced Wednesday by the Department of Defense, is for the company to conduct critical design review of the Tomahawk Weapons System Military Code's software and hardware. The contract also covers development work on an AGR5 kit, an anti-jam tool to be used for the global positioning system. The design review will include "studies, analysis, design, development, integration and test of hardware and software solutions," the Pentagon said in a press release. The contract also includes Navy funds for "assembly, integration, test and documentation of an AGR5 kit," the notice said. Raytheon will perform more than half the work in El Segundo, Calif., and the rest in Tucson, Ariz., with work expected to be completed by March 2021. https://www.upi.com/Defense-News/2019/09/19/Raytheon-awarded-254M-for-Tomahawk-Weapons-Systems-Military-Code-AGR5-kit/1891568909920/
14 août 2020 | International, Aérospatial
By: Valerie Insinna   WASHINGTON — Despite impacts from the coronavirus pandemic, the U.S. Air Force's B-21 Raider program remains on track as Northrop Grumman continues production of the first B-21 bomber, the head of the service's Rapid Capabilities Office said Thursday. Speaking at a Mitchell Institute for Aerospace Studies event, RCO Director Randall Walden acknowledged that some B-21 suppliers had been adversely affected by the ongoing coronavirus pandemic. For instance, Spirit AeroSystems — which builds large composite aerostructures for the bomber — has run into challenges not only on its defense side, but also for its commercial division due to the halt in Boeing 737 Max production, Walden said. Spirit received $80 million in Defense Production Act funds meant to help stimulate struggling businesses, and Walden noted that the company also funneled employees who normally work on the 737 Max line into augmenting B-21 production efforts. “The folks that are not manufacturing 737s and those components came over to our production line and really kind of beefed up — where people had some COVID issues — they beefed up that portion of our production,” he said. “Right now, the components that we're building are really for the test fleet, but the good news: All of what we're doing today is really insightful for what we're doing for production in the future.” After completing a critical design review in 2018, B-21 prime contractor Northrop Grumman is currently building the first B-21 test aircraft in Palmdale, California. The Air Force plans to buy at least 100 Raiders. On Aug. 3, Walden traveled with Defense Secretary Mark Esper to Northrop's B-21 design and development office in Melbourne, Florida, to receive a program update. “I think overall his takeaway was he's happy with the progress we're making,” Walden said. “The good news is all of the tough critical designs, all of the hard engineering is kind of behind us, and now it's a matter of actually producing the airplane and actually rolling it out and getting on with the developmental flight test activities.” Walden said his office has flight tested some B-21 mission systems and avionics on a surrogate aircraft to work though software bugs and design problems before installation on the actual B-21 test aircraft. “I know we're not going to be immune from design flaws. We're going to have to work through those, and we're doing some of that today. From my perspective, I want to find out what those design deficiencies were as fast as I can, get on with a solution, get that into the program in the development phase, and get on with production.” In July 2019, Air Force Vice Chief of Staff Gen. Stephen Wilson said the Raider could take to the skies in about “863 days,” which would pinpoint an inaugural flight in December 2021. Walden has since said that would be the earliest possible date for first flight. https://www.defensenews.com/air/2020/08/13/b-21-still-on-track-despite-complications-from-pandemic/