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July 30, 2018 | International, Land

DoD researchers literally reinvented the wheel with shape-shifting tracks

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Wheels are faster on hard surfaces, while a tracked design performs better on soft ground.

Rather than pushing a ground combat vehicle through terrain it doesn't perform well on, why not just slap on some shape-shifting wheels?

A team from Carnegie Mellon University's National Robotics Engineering Center demonstrated the feasibility of such shape-shifting wheel-track mechanisms for the Defense Department recently.

The new technology, dubbed a “reconfigurable wheel-track,” can transition from a round wheel to a triangular track and back again while the vehicle is in motion — allowing for an instant improvement in tactical mobility on shifting terrain.

The wheel-track is part of the Defense Advanced Research Projects Agency's Ground X-Vehicle Technologies, or GXV-T, program, which aims to improve mobility, survivability, safety, and effectiveness of future combat vehicles without piling on more armor, according to a June 22 press release.

“We're looking at how to enhance survivability by buttoning up the cockpit and augmenting the crew through driver-assistance aids,” said Maj. Amber Walker, the program manager for GXV-T in DARPA's Tactical Technology Office. “For mobility, we've taken a radically different approach by avoiding armor and developing options to move quickly and be agile over all terrain.”

The DARPA initiative is looking to build a future in which combat vehicles can traverse up to 95 percent of off-road terrain, including slopes and various elevations.

The new wheel-track design is just one of the contract awardees that recently demonstrated advances on a variety of potentially groundbreaking technologies that meet the program's goals.

DARPA also showcased a new “multi-mode extreme travel suspension” system that allows for "high-speed travel over rough terrain, while keeping the vehicle upright and minimizing occupant discomfort,” the agency said in its statement.

The suspension can move 42 inches upward and 30 inches downward, and keeps itself level on steep grades by adjusting each wheel.

Other enhanced mobility designs include an electric in-hub motor built by QinetiQ, which puts motors directly inside the wheels, offering heightened acceleration and maneuverability with optimal torque, traction, power, and speed over rough or smooth terrain.

“QinetiQ demonstrated a unique approach, incorporating three gear stages and a complex thermal management design into a system small enough to fit a standard military 20-inch rim,” according to the release.

Another new development could impact a vehicle crew's awareness.

Most combat vehicles have small windows. This improves the protection offered to troops, but limits their visibility to spot threats and targets. The GXV-T program is looking at sensor technologies to give mechanized troops their eyes back.

One design by Honeywell International boasts an enhanced 360-degree awareness suite through virtual windows. The company showed that capability off in a windowless cockpit of an all-terrain vehicle with an opaque canopy, according to the DARPA release.

“The 3D near-to-eye goggles, optical head-tracker and wrap-around Active Window Display screens provide real-time, high-resolution views outside the vehicle,” the release reads. “In off-road courses, drivers have completed numerous tests using the system in roughly the same time as drivers in [ATVs] with full visibility.”

No fielding date has been announced by DARPA's offices for the new mobility technologies, but the program could help solve many of the ongoing mobility issues troops have experienced in recent conflicts.

For a full breakdown of the technologies being vetted through DARPA's GXV-T program, check out this YouTube video by the agency.

https://www.militarytimes.com/news/your-air-force/2018/07/27/dod-researchers-literally-reinvented-the-wheel-with-shape-shifting-tracks/

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  • Japan Accelerates Its Defense Buildup

    January 14, 2019 | International, Aerospace, Naval, Land, C4ISR, Security

    Japan Accelerates Its Defense Buildup

    by Milton Ezrati Tokyo will begin to alter the security equation in the Western Pacific in the not-too-distant future. Long pacifist, Japan has decided to accelerate its military spending and effectively begin to gear up. It should hardly come as a surprise. Though Prime Minister Shinzo Abe has long sought to shift Japan from pacifism to what he calls a “normal country,” North Korea's missiles and China's aggressiveness in the Pacific would have left Tokyo little choice anyway. Spending has stepped up dramatically, as has planning. The nature of the buildup responds to other pressures from its great ally, the United States, which wants Japan to buy more U.S. equipment, as well as from the demographic and technological imperatives facing that nation. Even now, some seventy-two years after Douglas MacArthur directed the writing of the then defeated Japan's constitution, the document still limits the country's room to maneuver. Spending cannot exceed 1.0 percent of gross domestic product (GDP). Though clever accounting allows wiggle room, this rule nonetheless imposes a severe constraint especially next to China and the United States, each of which spend more than 3.0 percent of their much larger GDPs on defense. Because the constitution stresses defense exclusively, it naturally questions any preparation to project power, not the least the Ministry of Defense's (MoD) intention to construct two aircraft carriers and possibly base Japanese ground forces outside the country. The constitution also forbids Japan entering any mutual defense pact. Despite Japan's long-term alliance with the United States, it cannot go to America's aid if, for instance, a U.S. base in Asia was attacked. Prime Minister Abe has strived to change the constitution and has won concessions, but it remains a constraint. The MoD budget requests for 2019 nonetheless make clear the new military emphasis. According to documents published in September, the MoD is asking for ¥5.3 trillion ($48 billion) in overall defense outlays, which is 7.2 percent above the 2018 budgeted amount. A jump like that would be noteworthy in any country, but especially so in Japan, where heretofore defense spending grows by fractions of a percent per year. Five-year plans would sustain this heightened level of spending. Still more interesting is the proposed allocation of these funds. Here, each point reflects the various pressures on Japan. North Korea's presence is probably most evident. The budget document emphasizes on “deterrence,” which no doubt lies behind the decision to upgrade the electronic warfare capability of Japan's existing F-15 fighter jets and purchase six F-35A fighters from Lockheed Martin. New plans call for purchases of 147 of these new fighters over the next few years, well above the original plan to buy forty-two of them. U.S. pressure is also clearly evident in this decision, as it will preclude purchase of the domestically developed F-2 fighter. In the words of one Japanese security analyst, Masahiro Matsumura, Japan's “defense industry is being sacrificed for the political goal of maintaining good Japan-U.S. relations.” Less controversial but also clearly aimed at the North Korean threat, the budget calls for Japan to upgrade its airborne early warning capability and spend nearly ¥300 billion ($2.7 billion) to deploy two land-based Aegis missile defense systems (“Aegis Ashore”) and other U.S. manufactured missile interceptors. Measures to counter China, at sea mostly, make a longer list. Of course, the F-15 upgrades and the new F-35s constitute something of an answer to China. More pointed are MoD plans to procure RQ-40 Global Hawk long distance drones, fund research to develop a long-distance undersea unmanned surveillance device, and otherwise enhance naval heft by procuring more anti-air missile and anti-torpedo ammunition as well as more standoff missiles. Plans also call for the construction of a new submarine, aimed, in the words of MoD budget documents, at “detections, etc.” (The etcetera no doubt refers to offensive capabilities that might raise constitutional questions.) Japan also has plans to construct two new multipurpose, compact destroyers that can also sweep mines. They will bring the fleet escort force to a total of fifty-four vessels—a considerable upgrade from the past. More controversial from a constitutional standpoint are other efforts that would: 1) enable the military to project power and 2) obligate Japan to its allies. The MoD seeks to procure a tanker to support the navy at sea, a clear statement that Japanese naval power has gone beyond coastal defense. The ministry also seeks two new C-2 transport aircraft and six more UH-X helicopters specifically aimed at rapid deployments. Also, it seeks a training budget to ready Japanese ground forces for more distant deployments. The ministry also seeks to refit an existing helicopter carrier over the next few years to carry some of the new F-35 fighters and then build a second carrier. In some interpretations, this clearly violates the self-defense strictures in Japan's constitution, though the prime minister and the MoD have couched the requests in defensive terms. In what also might constitute a further violation of the constitution, the ministry has asked for concessions to allow greater integration of Japanese command, control, and planning with allies, the United States, obviously, but also India, Australia, and ASEAN, in other words those nations trying to check Chinese expansion. Beyond these obvious countermeasures to North Korea and China, the MoD has also emphasized the need for modernization. It has set aside funds to establish what in the United States might describe as a cyber-defense command and to investigate the military use of artificial intelligence (AI). In a similar vein, the ministry has dedicated development funds to eventually install protections for Japan's satellites, including an optical telescope with which to identify objects flying nearby. It has further dedicated a not insignificant ¥2.7 billion ($24 million) to work with the United States on what it calls “deep space international awareness.” Not only do these efforts capture further needs, but the budget document emphasizes that the military will help Japan cope with its long-prevailing low birth rate and the resulting shortfall in people who meet the military's age requirements. One other aspect of this effort is the ministry's remarkably un-Japanese push to put more women into uniform. Even if not every yen makes it to its designated place, it is apparent that Japan will begin to alter the security equation in the Western Pacific in the not-too-distant future. If Abe manages to alter the constitution as planned, then the change will no doubt occur at an accelerated pace. It will alter Washington's calculations. Beijing surely will also take note. Milton Ezrati is a contributing editor at the National Interest , an affiliate of the Center for the Study of Human Capital at the University at Buffalo (SUNY), and chief economist for Vested, the New York based communications firm. His latest book is Thirty Tomorrows: The Next Three Decades of Globalization, Demographics, and How We Will Live . https://nationalinterest.org/feature/japan-accelerates-its-defense-buildup-41277

  • Lynx 41 disqualified from Bradley replacement competition

    October 7, 2019 | International, Land

    Lynx 41 disqualified from Bradley replacement competition

    By: Jen Judson WASHINGTON — The Army has disqualified Raytheon and Rheinmetall's bid for the Optionally Manned Fighting Vehicle prototype competition, Defense News has learned. The OMFV is meant to replace the service's Bradley Infantry Fighting Vehicle. The Army's plan was to take the bid samples submitted this week, evaluate them over a period of time and then choose two companies to deliver 14 prototypes each and then would pick a single winner after further evaluation. The Army's goal was to begin replacing Bradleys in 2026. The Army would not comment on the disqualification and said in a statement sent to Defense News that the solicitation for the OMFV prototyping effort closed on Oct. 1 and “we are now in the competition sensitive Source Selection Evaluation process.” The service noted in the statement that it “remains committed to rapidly execute the Optionally Manned Fighting Vehicle program,” its number two modernization priority. But multiple sources have confirmed that the bid — Rheinmetall's Lynx 41 Infantry Fighting Vehicle — was disqualified and the bid sample, the only one in existence, remains in Germany at the company's facility in Unterluss. The Army required the competitors to deliver a single bid sample — a full-up working vehicle — to Aberdeen Proving Ground, Maryland, by Oct. 1. The Lynx has left the Rheinmetall compound several times before, notably to travel to be unveiled in Paris at Eurosatory in June 2018 and again at the Association of the U.S. Army's annual conference last fall. Raytheon and the Rheinmetall announced at AUSA that they would partner on the OMFV program and submit Lynx as its offering. The disqualification of the team means that General Dynamics Land Systems' offering is the only vehicle remaining in the competition. According to sources, no other company submitted. Hanwha, a South Korean defense company, was interested in competing but chose not to participate, multiple sources claim. Industry sources have said that several companies who wanted to compete or submitted bids had asked for extensions, roughly 90 days in the case of Rheinmetall, to meet requirements. According to multiple sources, potential bidders expressed concern to the service that meeting the requirements, the timeline and a combination of the two wasn't possible. What snarled Rheinmetall, for instance, according to sources, was the timeline it needed to get approvals from the local municipal government to transport the vehicle by tractor trailer or rail and then via air. Sources said that the company had requested a four-week extension to deliver the vehicle to Aberdeen and also offered to hand over the vehicle to the Army under lock and bond in Germany by the Oct. 1 deadline and both were denied. But a larger issue, multiple sources conveyed, was the clear differences between what the Army acquisition community and what Army Futures Command wanted to do. Sources confirmed that the acquisition side of the house was willing to agree to extensions, for instance, but AFC, who is in charge of rapid requirements development and prototyping efforts ahead of programs of record, insisted the Army must adhere to the schedule. Industry also expressed concern to the Army over the roughly 100 mandatory requirements, with just six tradeable ones, expected to be met over 15 months using non-developmental vehicles. Brig. Gen. Ross Coffman, who is in charge of Next-Generation Combat Vehicle (NGCV) modernization efforts, said at the Defense News Conference in September that he was confident the requirements set for OMFV are appropriate and had no plans to change them. Presently, the OMFV competition is on hold due to a congressionally mandated continuing resolution that prevents the effort from kicking off. The Army had planned to begin the $378 million program in the first quarter after taking receipt of the bid samples at the start of the new fiscal year. As the Army enters its competition to build prototypes to replace the Bradley, Australia is running a similar effort and recently downselected to two competitors: Rheinmetall's Lynx and an offering from Hanwha. GDLS was competing but did not make the final cut. Australia laid out just five mandatory requirements for its competition. GDLS has not yet detailed its offering for OMFV but said it was “purpose built” for the U.S. Army. https://www.defensenews.com/land/2019/10/04/lynx-41-disqualified-from-bradley-replacement-competition/

  • India takes next step toward new 155mm towed howitzers

    February 13, 2024 | International, Naval

    India takes next step toward new 155mm towed howitzers

    The towed gun systems are to be no heavier than 15 tons, and they must be able to fire existing 155mm rounds to a distance of 40-plus kilometers.

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