20 août 2020 | International, Aérospatial
WASHINGTON — In 2022, the U.S. Air Force will take delivery of the F-15EX, a new and improved version of the nearly 40-year-old F-15E Strike Eagle.
But for all of the modern advances of the new jet, only 9 percent of women in the Air Force currently meet the body-size standards for piloting the legacy F-15 and possibly also the new EX variant, potentially blocking highly qualified pilots from flying a platform that will be in operation for decades to come.
Like the vast majority of the Air Force's aircraft and aircrew equipment, the F-15 was designed to meet the anthropometric specifications of a male pilot in 1967. But in an Aug. 4 memo, the Air Force mandated that future weapons programs use current body size data that reflects the central 95 percent of the U.S. recruitment population — a move meant to make pilot and aircrew jobs more accessible to women and people of color.
Air Force acquisition executive Will Roper, who signed off on the changes, said there is a strategic imperative for opening the door to a more diverse pool of pilots and aircrew.
During a war with a near-peer, technologically advanced nation like China, the U.S. military will have to contend with a well-trained, highly educated force that might outnumber its own, he said. By fielding weapon systems that can only be used by a smaller portion of the U.S. population, the Air Force could be shutting out some of its most promising potential pilots or aircrew.
“The human factor is a delineator and it likely will be against an adversary like China, where I believe we will have a greater propensity to trust the operator in the seat, to delegate more, to empower more and take greater risk in that delegation,” Roper told Defense News in an exclusive Aug. 6 interview.
“All well and good when you're a country that's going to face a country with a population that's four times your own by the end of this decade,” he said. “But if we begin with a recruitment population that we've artificially halved because of how we design our cockpits and workstations, we've just doubled our work, and now we make every operator in the seat have to be eight times better than the counterpart they will face in a nation like China.”
The new guidance directs the Air Force Lifecycle Management Center to conduct a study that will solidify a more inclusive anthropometric standard that would include 95 percent of the U.S. population eligible for recruitment in the U.S. Air Force.
But until that wraps up, all new-start Air Force programs must be designed with cockpits, aircrew operating stations and aircrew equipment that accommodates eight anthropometric data sets. These eight cases use measurement data from the Centers for Disease Control and represent a range of body types including individuals who are short in stature, have short limbs or have a long torso.
AFLCMC's Airman's Accommodations Laboratory will also run a three-year study that will develop separate anthropometric standards for career enlisted aviators, who perform specialized jobs onboard military aircraft including flight engineers, flight attendants and loadmasters. Currently, career enlisted aviators also must meet the 1967 anthropometric standards.
‘A hidden barrier'
The legacy design parameters — which stem from a 1967 survey of male pilots and measure everything from a pilot's standing height, eye height while sitting, and reach — have effectively barred 44 percent of women from being able to fly aircraft unless they receive a waiver, with women of color disproportionately affected, the Air Force stated.
Even after a waiver is granted, the pilot will remain disqualified from certain platforms regardless of his or her aptitude. Then, when future requirements are defined for new platforms or equipment, the systems are usually designed to meet the existing pool of pilots, creating a self-perpetuating problem.
“It is a hidden barrier with multiple layers,” said Lt. Col. Jessica Ruttenber, an Air Force mobility planner and a leader of the Women's Initiative Team that advocated for the change in anthropometric standards. “People are trying to do the right thing, but the barriers are baked into legacy policy. And without even knowing it, they're kind of cut and pasting the same standard.”
Ruttenber said the new guidance addresses the root of the problem by establishing new design specifications — ensuring platforms are engineered to accommodate a wide range of body sizes from the start of the development process, rather than papering over the problem with waivers after the fact.
“[For] the next inter-theater airlift that is going to replace the C-130 or C-17, we can't get the anthropometric data wrong or women are still going to be eliminated 30 years from now. The C-130 and C-17 still eliminate one out of three women from flying it,” she said.
For more than a year, the Women's Initiative Group worked with Chief Master Sgt. Chris Dawson, the career field manager for the Air National Guard's career enlisted aviators, on trying to garner funding for an anthropometric study for CEAs.
“There were so many communities we had to coordinate with that we realized really quickly that this has to come from the top down or we're not going to be as successful,” Ruttenber said. After meeting with Roper, the Women's Initiative group was granted $4 million for the study.
Ruttenber, a KC-135 pilot, remembers being pulled out of her first pilot training class in 2005 because her physical examination indicated that she didn't meet the standing height requirement of 5-foot-4 by a fraction of an inch. She then sought a waiver that would allow her to fly.
“The process was different back then. I had to drive from base to base and get measured in each cockpit in an attempt to get an exception to policy. I went to Charleston and I got measured in a C-17, and then I went to Little Rock and got measured in a C-130,” she said. “I got measured in the KC-135 and so on and so on and so on.”
Since then, the Air Force has made the process to obtain a waiver less arduous, and it recently removed the initial height requirement — although some platforms still require pilots to meet the 5-foot-4 standard. Newer aircraft such as the F-35 joint strike fighter and the T-7 trainer currently under development will also accommodate a wider height and weight range.
However, Ruttenber pointed out that the specifications for legacy aircraft will remain a hurdle for the progression of female pilots.
“Even if the F-35 is 97 percent accommodating for women, I still can't get there because the T-38,” which is used for fighter pilot training, “has a 41 percent accommodation envelope for women,” she said.
Roper said he is working with defense contractors to see whether there can be modifications made to legacy platforms — or upgraded versions like the F-15EX — that will accommodate operators with a wider range of body sizes.
But whether those changes are ultimately made will depend on if they are technically feasible and funding is available for design changes.
At the time of the Aug. 6 interview, Roper had already spoken to some defense industry executives — including those from Lockheed Martin — about the new guidance and planned similar phone calls with Boeing and Northrop Grumman officials over the coming days. The reaction from industry so far has been “very positive” but “very surprised” that such bias still exists, he said.
However, Roper acknowledged that more work has yet to be done.
“Changing the policy is one thing. Changing the platforms is another. And that's going to require cost to do. My next job, aside from designing future systems differently — which we'll do — is to find options to bring systems into greater compliance with the new policy and then to advocate tooth and nail for the funding needed to do it,” he said. “The litmus test for the Air Force long term has got to be balancing accommodation with the technology for future platforms.”
23 mai 2023 | International, Autre défense
The latest batch of PESCO programs targets sea cable protection, torpedo-killing torpedos, new air-to-air missiles, ground robots and more.
6 septembre 2018 | International, Naval
By Gina Harkins Some of the Navy's ships could stay in service well beyond their scheduled lifespan as leaders look for ways to modernize existing vessels as part of a decades-long fleet buildup. Navy leaders want to have 355 ships by 2030, but that doesn't mean that all of them will come new. Officials are studying ways to salvage some of the service's aging vessels as part of that plus-up -- and that doesn't come without challenges. "[Operating] as an away-game Navy is very expensive, and this requires us to look at the lifespan of everything we own," Vice Adm. William Merz, deputy chief of Naval Operations for Warfare Systems, said Wednesday at conference hosted by Defense News. Navy leaders plan to detail the kinds of capabilities they'll need in a 355-ship fleet in an extensive report expected to be released next year. Part of that process, Merz said, will include taking a look at what ships will still be relevant in a future fight. That's an important factor in determining how much money to invest in refurbishing ships that have already been in service for decades. The Navy recently decided to extend the lives of some cruisers and destroyers, he said, because they're so effective. Full article: https://www.military.com/daily-news/2018/09/05/355-ship-navy-will-mean-extending-vessels-past-planned-lifespans-admiral.html
16 octobre 2018 | International, Naval
By: Daniel Cebul WASHINGTON — The Office of Naval Research awarded Lockheed Martin Oct. 1 a two-year, $5.8 million contract to explore how machine learning and artificial intelligence can make complex 3-D printing more reliable and save hours of tedious post-production inspections. In today's factories, 3-D printing parts requires persistent monitoring by specialists to ensure intricate parts are produced without impurities and imperfections that can compromise the integrity of the part overall. To improve this laborious process, the Navy is tasking Lockheed Martin with developing multi-axis robots that use lasers to deposit material and oversee the printing of parts. Lockheed Martin has multiple partners on the contract including Carnegie Mellon University, Iowa State University, Colorado School of Mines, America Makes, GKN and Wolf Robotics and Oak Ridge National Laboratory. The contract covers what Glynn Adams, a senior engineer with Lockheed Martin, describes as the pre-flight model of the program's development. Initial work will focus on developing computer models that can predict the microstructures and mechanical properties of 3-D printed materials to generate simulation data to train with. Adams said the Carnegie Mellon team will look at variables such as, “the spot size of the laser beam, the rate of feed of the titanium wire [and]the total amount energy density input into the material while it is being manufactured.” This information helps the team predict the microstructure, or organizational structure of a material on a very small scale, that influences the physical properties of the additive manufactured part. This data will then be shared with Iowa State, who will plug the information into a model that predicts the mechanical properties of the printed component. By taking temperature and spot size measurements, the team can also ensure they are, “accurately controlling energy density, the power of both the laser and the hot wire that goes into the process,” Adams said.. “All of that is happening before you actually try to do any kind of machine learning or artificial neural networks with the robot itself. That's just to try to train the models to the point where we have confidence in the models,” Adams said. Sounds easy, right? But one key problem could come in cleaning up the data and removing excess noise from the measurements. “Thermal measurements are pretty easy and not data intensive, but when you start looking at optical measurements you can collect just an enormous amount of data that is difficult to manage,” Adams explained. Lockheed Martin wants to learn how shrink the size of that dataset without sacrificing key parameters. The Colorado School of Mines and America Makes will tackle the problem of compressing and manipulating this data to extract the key information needed to train the algorithms. After this work has been completed, the algorithms then will be sent to Oak Ridge National Laboratory, where robots will begin producing 3-D titanium parts and learn how to reliably construct geometrically and structurally sound parts. This portion of the program will confront challenges from the additive manufacturing and AI components of the project. On the additive manufacturing side, the team will work with new manufacturing process, “trying to understand exactly what the primary, secondary and tertiary interactions are between all those different process parameters,” Adams said. “If you think about it, as you are building the part depending on the geometric complexity, now those interactions change based on the path the robot has to take to manufacture that part. One of the biggest challenges is going to be to understand exactly which of those parameters are the primary, which are the tertiary and to what level of control we need to be able to manipulate or control those process parameters in order to generate the confidence in the parts that we want.” At the same time, researchers also will tackle AI machine learning challenges. Like with other AI programs, it's crucial the algorithm is learning the right information, the right way. The models will give the algorithms a good starting point, but Adams said this will be an iterative process that depends on the algorithm's ability to self-correct. “At some point, there are some inaccuracies that could come into that model,” Adams explained. “So now, the system itself has to understand it may be getting into a regime that is not going to produce the mechanical properties or microstructures that you want, and be able to self-correct to make certain that instead of going into that regime it goes into a regime that produces the geometric part that you want.” With a complete algorithm that can be trusted to produce structurally sound 3-D printed parts, time-consuming post-production inspections will become a thing of the past. Instead of nondestructive inspections and evaluations, if you “have enough control on the process, enough in situ measurements, enough models to show that that process and the robot performed exactly as you thought it would, and produced a part that you know what its capabilities are going to be, you can immediately deploy that part,” said Adams. “That's the end game, that's what we're trying to get to, is to build the quality into the part instead of inspecting it in afterwards." Confidence in 3-D printed parts could have dramatic consequences for soldiers are across the services. As opposed to waiting for replacement parts, service members could readily search a database of components, find the part they need and have a replacement they can trust in hours rather than days or weeks. “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.” https://www.c4isrnet.com/industry/2018/10/15/how-the-office-of-naval-research-hopes-to-revolutionize-manufacturing