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Boston Dynamics Officially Unveils Its Wheel-Leg Robot: "Best of Both Worlds"

Handle is a humanoid robot on wheels, and it's amazing

3 min read
Boston Dynamics' Handle robot
Boston Dynamics' Handle is a humanoid robot on wheels, and it's amazing.
Image: Boston Dynamics via YouTube

When Boston Dynamics introduced its massively upgraded Atlas last year, we said the robot could “do things we’ve never seen other robots doing before, making it one of the most advanced humanoids in existence.” But now, after seeing the video that Boston Dynamics just released to officially unveil its newest creation, Handle, a sort of Atlas on wheels, we’ll just say it again: Handle can do things we’ve never seen other robots doing before, making it one of the most advanced humanoids in existence.

“Wheels are a great invention,” Marc Raibert, founder and president of Boston Dynamics, tells IEEE Spectrum, adding that Handle, which uses a wheel-leg hybrid system, “can have the best of both worlds.”

You probably saw footage of Handle a few weeks ago, when Raibert gave a talk in California and someone filmed the screen with a phone and posted it on YouTube. When we asked Boston Dynamics about the leaked video, the company said it wasn’t ready to discuss the new robot and suggested that we wait. Now, finally, we have more details about Handle, and Raibert even answered a few of our questions on why and how they built the robot.

Boston Dynamics says Handle is an “R&D robot,” so although it can perform a number of useful tasks, like carrying 45-kilogram crates, it probably won’t be commercially available anytime soon. Handle has a range of 24 kilometers on a battery charge, which is much more than what it would be able to cover with traditional bipedal robot locomotion. Using wheels also helps reduce the number of degrees of freedom, and the company says Handle is “significantly less complex” than some of the quadruped and biped robots that preceded it.

[shortcode ieee-pullquote quote=""Much of the control used in Handle leverages our team's experience with the quadruped and biped robots. The software is not exactly the same, but the balance and dynamic control principles have a lot in common and share the same physics-based roots."" float="right" expand=1]

Indeed, this kind of multi-modal locomotion is highly effective. In a much more limited capacity, it’s what helped DRC-HUBO win the DARPA Robotics Challenge Finals: Being able to use both wheels and legs helps your robot efficiently adapt to different situations, trading the ability to traverse rough terrain for speed (and stability, which legged robots can have trouble with) and back again whenever necessary, just like you would as a human with a pair of rollerblades.

Teaching bipeds to move like this seems like an idea with a lot of potential, especially if Boston Dynamics can develop a generalized controller that allows robots with regular legs to take advantage of wheels—imagine the next generation of Atlas being equipped with an integrated pair of roller shoes like Heelys. We’re not sure if that’s part of the company’s plans, but here’s what Raibert told us about Handle and his team’s experience using wheels after famously building so many legged robots.

  1. IEEE Spectrum: How did the idea to build a wheeled robot come about, and how long did it take to build it?

    Marc Raibert: We’ve had the idea for building a robot that combined legs with wheels for a long time, but never had the opportunity to explore it. We started last summer and had something working in about six months. We accelerated the project by using components for power, arms, and upper body that were originally designed for Atlas.

    Were you able to reuse or adapt any of the bioinspired control strategies you’ve used so successfully in legged robots?

    Much of the control used in Handle leverages our team’s experience with the quadruped and biped robots. The software is not exactly the same, but the balance and dynamic control principles have a lot in common and share the same physics-based roots.   

    Is Handle’s upper body an Atlas torso, or a completely new design? And is the robot all electric or does it use hydraulics?

    Yes, it uses Atlas’s torso and a slightly modified version of Atlas’s arms. [For power we use] electric power (batteries), but both electric and hydraulic actuation.

    How do you and your team feel about working with wheels after working on legged designs for so long?

    Wheels are a great invention. But wheels work best on flat surfaces, and legs can go anywhere. By combining wheels and legs, Handle can have the best of both worlds.

The Conversation (0)

The Bionic-Hand Arms Race

The prosthetics industry is too focused on high-tech limbs that are complicated, costly, and often impractical

12 min read
A photograph of a young woman with brown eyes and neck length hair dyed rose gold sits at a white table. In one hand she holds a carbon fiber robotic arm and hand. Her other arm ends near her elbow. Her short sleeve shirt has a pattern on it of illustrated hands.

The author, Britt Young, holding her Ottobock bebionic bionic arm.

Gabriela Hasbun. Makeup: Maria Nguyen for MAC cosmetics; Hair: Joan Laqui for Living Proof

In Jules Verne’s 1865 novel From the Earth to the Moon, members of the fictitious Baltimore Gun Club, all disabled Civil War veterans, restlessly search for a new enemy to conquer. They had spent the war innovating new, deadlier weaponry. By the war’s end, with “not quite one arm between four persons, and exactly two legs between six,” these self-taught amputee-weaponsmiths decide to repurpose their skills toward a new projectile: a rocket ship.

The story of the Baltimore Gun Club propelling themselves to the moon is about the extraordinary masculine power of the veteran, who doesn’t simply “overcome” his disability; he derives power and ambition from it. Their “crutches, wooden legs, artificial arms, steel hooks, caoutchouc [rubber] jaws, silver craniums [and] platinum noses” don’t play leading roles in their personalities—they are merely tools on their bodies. These piecemeal men are unlikely crusaders of invention with an even more unlikely mission. And yet who better to design the next great leap in technology than men remade by technology themselves?

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