Military autonomous vehicle design

| Transport

Military vehicles need special consideration for autonomous control
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Pailton Engineering takes a look at some of the considerations needed for bringing driverless vehicle technology to the military arena.

The US army aims to have its first Robotic Combat Vehicles Technology demonstrator ready by 2021, but what changes will this unmanned paradigm bring to the manufacture of military vehicles? Nick Jordan, technical engineering manager at military steering system specialist, Pailton Engineering, combats the issues related to autonomous design.

Unlike Uber or Google’s Waymo, the self-driving technology developed by the military won’t only be designed for America’s roadways but for conflict zones all over the world. The military is primarily concerned with developing robust and reliable tactical vehicles to withstand these terrains, while removing people from unnecessarily risky situations.

According to Pentagon figures, in 2013 alone, some 60 percent of US combat causalities were related to convoy resupply. Autonomous vehicles to deliver supplies could address this issue.

Positively, last year saw the joint US-UK Coalition Assured Autonomous Resupply (CAAR) demonstration in Michigan. This ground-breaking line-haul convoy involved a truck leading two follower trucks, using integrated on-board robotics to make autonomous decisions regarding speed and steering. It proved revolutionary and demonstrated the potential of taking humans out of the equation in supply delivery.

For the military, autonomous driving technology is an important priority at present. While some engineers are open to retrofitting vehicles with commercial technology, others are looking at new sensor technology, such as LIDAR, which uses pulsed lasers to measure distances between objects and navigate successfully.

The laser scanner provides a 360-degree view of what’s happening around the vehicle. The creators of LIDAR claim their products are capable of identifying far away objects regardless of their size, be it a piece of paper, butterfly or tyre debris and take the necessary action.

The precision of this technology is crucial, as sensors must be able to differentiate between a tree and a camouflaged enemy. Arguably, sensors for military applications require a deeper level of intelligence than other commercial autonomous vehicles for this reason.

It goes without saying that the current considerations for human-driven military vehicles will also need to be brought into the new paradigm of combat vehicles. Just because they are autonomous, does not mean they require less engineering than a regular vehicle. This is particularly important considering this industry is more likely to see a transition to semi-autonomous vehicles, before a move to fully autonomous versions.

For instance, adverse weather conditions, such as sandstorms, black ice and dust can challenge even the best military vehicles in the industry. Without an expert steering system, suspension system and chassis, you cannot make use of the new autonomous driving technology.

Take the steering system as an example. If the parts used aren’t bespoke to the vehicle and the conditions it will face, it will be severely limited in action, even with the most intelligent insight on far ahead objects.

Thankfully, rigorous physical and environmental testing in the steering industry now means steering components can take on the debris, moisture and temperature variation that is faced in service, without resulting in water ingress or high torque steering.

Once the bespoke steering is in place, the vehicle stands the best possible chance in taking on extreme conditions and rough terrain. Combined with autonomous driving technology, this holds huge opportunities for the US and UK military industry to develop the most reliable and capable autonomous military vehicles in the world.

As autonomous vehicles become more widespread, the acceptance of the technology in daily life will bolster such use in the military. Already, the prices of sensors and software in the general robotics industry have been driven downwards by the combination of economies.

It certainly looks promising for 2021, as we anticipate the first look of the Robotic Combat Vehicles Technology demonstrator. However, engineers are being urged to opt for bespoke steering to equip these vehicles with the highest level of capabilities, as software is redundant without the right hardware.

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