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Lingodroid Robots Invent Their Own Spoken Language

lingodroids language robots

When robots talk to each other, they're not generally using language as we think of it, with words to communicate both concrete and abstract concepts. Now Australian researchers are teaching a pair of robots to communicate linguistically like humans by inventing new spoken words, a lexicon that the roboticists can teach to other robots to generate an entirely new language.

Ruth Schulz and her colleagues at the University of Queensland and Queensland University of Technology call their robots the Lingodroids. The robots consist of a mobile platform equipped with a camera, laser range finder, and sonar for mapping and obstacle avoidance. The robots also carry a microphone and speakers for audible communication between them.

To understand the concept behind the project, consider a simplified case of how language might have developed. Let's say that all of a sudden you wake up somewhere with your memory completely wiped, not knowing English, Klingon, or any other language. And then you meet some other person who's in the exact same situation as you. What do you do?

What might very well end up happening is that you invent some random word to describe where you are right now, and then point at the ground and tell the word to the other person, establishing a connection between this new word and a place. And this is exactly what the Lingodroids do. If one of the robots finds itself in an unfamiliar area, it'll make up a word to describe it, choosing a random combination from a set of syllables. It then communicates that word to other robots that it meets, thereby defining the name of a place.

lingodroids language robots

From this fundamental base, the robots can play games with each other to reinforce the language. For example, one robot might tell the other robot “kuzo,” and then both robots will race to where they think “kuzo” is. When they meet at or close to the same place, that reinforces the connection between a word and a location. And from “kuzo,” one robot can ask the other about the place they just came from, resulting in words for more abstract concepts like direction and distance:

lingodroids language robots
This image shows what words the robots agreed on for direction and distance concepts. For example, “vupe hiza” would mean a medium long distance to the east.

After playing several hundred games to develop their language, the robots agreed on directions within 10 degrees and distances within 0.375 meters. And using just their invented language, the robots created spatial maps (including areas that they were unable to explore) that agree remarkably well:

lingodroids language robots

In the future, researchers hope to enable the Lingodroids to "talk" about even more elaborate concepts, like descriptions of how to get to a place or the accessibility of places on the map. Ultimately, techniques like this may help robots to communicate with each other more effectively, and may even enable novel ways for robots to talk to humans.

Schulz and her colleagues -- Arren Glover, Michael J. Milford, Gordon Wyeth, and Janet Wiles -- describe their work in a paper, "Lingodroids: Studies in Spatial Cognition and Language," presented last week at the IEEE International Conference on Robotics and Automation (ICRA), in Shanghai.


Awesomely Bad Ideas: Teaching a Robot to Sword Fight
Fri, May 13, 2011

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Disney Working on Artistic Robot Swarms

disney robot swarm

I didn't know that Disney had a research arm, but they do, and the work that they're presenting at the IEEE International Conference on Robotics and Automation (ICRA) here in Shanghai might give a little peek into one of their future theme park attractions.

What Disney researchers, working with colleagues at ETH Zurich, want to do is develop algorithms that instruct swarms of robots on how to move into into different patterns using smooth and visually appealing transitions. It's kind of like a marching band, except with lots of little robots that light up in pretty colors:

While the algorithms haven't been specifically designed to make the transitions nice looking, a variety of different strategies were tested, and the prettiest one was chosen. Next, the researchers are going to try to toss some obstacles into the mix, and see how well the robots do with moving patterns, as opposed to static shapes.

This isn't the only interesting paper that Disney Research is presenting at ICRA. They're also working on developing a control system for a robot that can walk around on a ball:

Disney robot ball

As to whether or how any of this is going to make it into a Disney theme park near you, well, you'll just have to keep your fingers crossed and use your imagination.

The Disney and ETH researchers -- Javier Alonso-Mora, Andreas Breitenmoser, Martin Rufli, Roland Siegwart, and Paul Beardsley -- describe the work in a paper, "Multi-Robot System for Artistic Pattern Formation," presented yesterday at ICRA.

Little Rolling Robot Transforms Into Helicopter

Designing a robot that can traverse variable terrain usually involves a number of unsatisfactory compromises. You can go with a flying robot, which will almost never get stuck, but is of limited use in detailed sensing and can't operate for very long. Or, you can go with a ground robot, which is much more efficient, but also much more likely to run into an obstacle that it can't get around.

An ideal platform would spend most of its time on the ground but still be able to fly when it needs to, but this is a very tricky thing to make happen, since the design of something that drives is fundamentally different from the design of something that flies. Researchers from the Center for Distributed Robotics at the University of Minnesota have managed to create a single robot that can actually do this effectively:

This is just the first (very fragile) prototype; the next version is much more robust and relies on a non-coaxial system for flight:

hybrid land air robot

hybrid land air robot

As it turns out, it was actually more efficient to design the robot with two completely independent motor systems than to try to design a transmission that would allow the low speed wheel motors to power the rotors or vice versa. And even then, it's still extremely complicated: the rotor folding mechanism cost almost US $20,000 to create. With that in mind, future developments for this platform will focus on making things simpler, while also teaching the robot to take advantage of its hybrid nature when it comes to autonomous path planning.

The researchers -- Alex Kossett and robotics professor and IEEE Fellow Nikolaos Papanikolopoulos -- describe their work in a paper, "A Robust Miniature Robot Design for Land/Air Hybrid Locomotion," presented yesterday at the IEEE International Conference on Robotics and Automation (ICRA), in Shanghai.


Aldebaran Robotics To Open Source Code of Nao Robot
Fri, May 13, 2011

Blog Post: The little French humanoid is going to reveal its code

KURMET Bipedal Robot Can Hop Over Obstacles
Thu, May 12, 2011

Blog Post: KURMET uses elastic actuators and a fuzzy control system to bounce up and over objects

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Wed, May 11, 2011

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ParkourBot Can Do Parkour
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Awesomely Bad Ideas: Teaching a Robot to Sword Fight

In a paper presented this week at the IEEE International Conference on Robotics and Automation (ICRA), in Shanghai, Georgia Tech researcher Tobias Kunz starts thusly: "In order to deploy safe and flexible robots for service and automation, robots must act safely in close contact with humans." Accompanying this innocuous first sentence is this picture:

human robot sword fight

You're probably wondering, at this point, just what the heck a robot with a sword has to do with safety of all things. And why do people keep giving swords to robots anyway? There was Hubo II dancing with one last year, and just three days ago we saw two industrial manipulators dueling with lightsabers.

As it turns out, Kunz says that one good way to get a robot to be dynamically safe around humans is to just program it to think of humans as adversaries. Huh? You may still be wondering why giving a robot a sword and teaching it to think of humans as bad guys is somehow a good thing, but bear with me.

On a fundamental level, a lot of what sword fighting is about is predicting the intentions of a human and then deciding how to respond. By teaching a robot to defensively (just defensively, mind you) block incoming sword attacks, the idea is to create a general model that robots can use to react quickly and safely around the unpredictable movements of nearby humans.

Plus, come on, it's just awesome. Here's a simulation of the work in progress:

So far, the sword fighting is only taking place in a computer, but as you can see from the pic, Georgia Tech does apparently have a real robot that's capable of wielding a real(ish) sword. Letting this thing loose against a pack of real-life ninjas is clearly the next logical step.

Kunz did the work with colleagues Peter Kingston, Mike Stilman, and Magnus Egerstedt, and their ICRA paper was titled, "Dynamic Chess: Strategic Planning for Robot Motion."


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Lingodroid Robots Invent Their Own Spoken Language
Tue, May 17, 2011

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Aldebaran Robotics To Open Source Code of Nao Robot

aldebaran nao

Aldebaran Robotics has just announced that it's going to open the source code of its popular humanoid robot Nao.

The French firm has been developing Nao over the past five years, turning an initially obscure robot with a quirky name into a widely adopted research and education platform used to study human-robot communication, help treat hospitalized children, and play soccer.

It's not yet clear exactly which parts of Nao's software platform will become open source and which will remain proprietary. The company said in a release that it will "share a significant part of [Nao's] source code with the research and developer community by the end of 2011."

Last year, when I interviewed Bruno Maisonnier, Aldebaran's founder and CEO, he hinted that making Nao more open was a desired move for the company, aimed at both building a stronger developer community and improving the robot's overall capabilities. Here's what he says in the release:

“Building robotics applications is challenging: applications are built upon many state-of-the-art complex technologies like speech recognition, object recognition, grasping, navigation and mapping. Applications need to be secure and be able to run in a constrained environment with limited resources. With over five years of experience in developing embedded systems for robotics platforms, we want to share our middleware, our core communication library, our cross-platform build tools and other essential modules with researchers, developers and emerging projects in humanoid robotics."

Open source is becoming a powerful trend in robotics. A year ago, another French company, Gostai, maker of robotics software and the Jazz telepresence robot, also announced it was opening the code of Urbi, its flagship product. This week, RoboDynamics introduced a US $3,000 personal robot called Luna that will likely run on open source software. Also this week, Google unveiled its Android Open Accessory, a project combining its mobile operating system, Android, and the popular DIY open source microcontroller Arduino. And then, of course, there's Willow Garage, the Silicon Valley firm that is perhaps the strongest backer of open source robotics and whose Robot Operating System, or ROS, and other open source projects are becoming ever more popular.

Not everyone in robotics has embraced open source, though. At least one major figure has said he doesn't favor the trend. In an interview with Forbes, iRobot CEO Colin Angle called into question the benefits of open source for the industry:

Angle also questions the benefits of some open-source robotic initiatives. He notes that giving away technology can hurt any business. “Solving the hard problems of robotics and giving those solutions away is the worst thing someone can do for the robotics industry,” says Angle. “You have to understand the economic engine behind things.”

That's a provocative statement. I'm sure many people would question the claim that open source robotics is bad for the consumers. But who knows, maybe there are others who would agree with him? What do you think?

Updated May 16, 2011: Fixed date when Urbi was released as open source.

Image: Aldebaran Robotics

Video: Reporter Meets, Hugs Creepy Telenoid Robot


Last year, Hiroshi Ishiguro, a roboticist at Osaka University who's built android copies of himself and other people, shocked the world with his strangest creation yet: a creepy robotic creature called Telenoid that looked like a supersized fetus. Ishiguro envisioned the Telenoid as a device a person would teleoperate to communicate with others.

The robot received a lot of attention, but there weren't really good videos showing how the thing operated. What we needed was an intrepid reporter willing to do a, uh, hands-on test with the bot. Now IDG has done just that and brings great footage of the Telenoid talking and squiggling under the grasp of their somewhat creeped-out correspondent.

It's clear from the video that the Telenoid can move its head and change its facial expressions, although only slightly, but still more than I expected. So for the person holding it, it's more than just a fancy, sperm-shaped giant telephone; whether you can feel the operator's "presence" via the robot I don't know, but according to the reporter who tried it, you might even want to hug it.

Researchers Smash Super-Tough Robot Arm With Baseball Bat

DLR Hand Arm System

Why is this man about to smash his robot with a bat?

Don't worry. It's just another day at the German Aerospace Center (DLR), where researchers have built what's probably the most advanced -- and tough -- robotic arm ever. And they aren't afraid of testing its limits.

It's called the DLR Hand Arm System [photo, below]. It has an anthropomorphic design and packs 52 motors, ultra-miniaturized control electronics, a supercapacitor-based power supply, and a web of synthetic tendons stronger than Kevlar. But what makes it stand out compared to conventional systems is its ability to withstand collisions, thanks to ingeniously designed joints and actuators that can absorb and dissipate energy, much like our own arms and hands do.

Which brings us to their latest test with the aforementioned wooden bat. The DLR researchers are known for their bold experiments. They've equipped a robot with a knife and tested a stabbing-avoidance algorithm on themselves. They've used massive industrial manipulators to mercilessly destroy crash test dummies. Last year, they demonstrated that their super-strong robot hand could endure a beating from a hammer. (Blogs promptly dubbed it the "Terminator hand.")

This time, they wanted to assess the robustness of the upper arm and shoulder. Would it still work after a violent collision? There was only one way to find out:

Did you notice how, after getting struck, the arm gently touches the yellow ball, exactly as it had done before? That's to show that its mechanisms and electronics are as good as new. If I could design a robot like this, I would be grinning just like the guy in the video.

The researchers, members of DLR's Institute of Robotics and Mechatronics, described the overall system in detail for the first time today at the IEEE International Conference on Robotics and Automation (ICRA), in Shanghai.

Markus Grebenstein, the Hand Arm System's lead designer, tells me that robustness is essential if we want to deploy service robots in the real world, where collisions are likely to happen. Even small shocks, he says, can damage conventional robots, which rely on motors coupled to joins in mechanically stiff configurations.

dlr hand arm system

This means that, in a collision, shock and vibration will spread through these rigid structures and, because they lack a mechanism to dissipate the energy, they will tear themselves apart. Even newer impedance control techniques, which lets robots move compliantly when a person or object pushes on them, can't help in collision situations, because feedback controllers and motors aren't fast enough.

The DLR team noticed this limitation in its own robots. One of them, Justin, is able to catch a ball thrown at him -- and even two balls at once -- most of the time. But in some cases, when the robot computed an inaccurate trajectory for the ball, it might stretch its fingers completely and the 80-gram ball, upon hitting the fingertips, would damage the hand. By comparison, a handball goalkeeper withstands the impact of a 480-gram ball moving at 120 kilometers per hour, or nearly five times as fast, and delivering 100 times as much energy.

floating spring joint variable stiffness actuationThe solution, the DLR group figured, was to completely rethink the design of robotic joints and actuators. For the upper arm, the researchers designed intricate shock-absorbing structures that they call "floating spring joints." As the name implies, it consists of two cam disks coupled to a spring, which helps dissipate energy and damp vibrations. The mechanism [diagram, above] is also different from conventional robot joints in that it uses not one but two motors: A powerful motor effectively moves the joint, while a smaller one adjusts the position of the cams and the spring to vary the stiffness of the joint. A harmonic drive gear interfaces the two motor modules.

variable stiffness actuationSimilarly, the hand also relies on variable stiffness actuation. As we described before in detail, the hand has 38 tendons, each connected to an individual motor. Two motors drive each finger articulation [diagram, right], in an antagonistic arrangement (when the motors turn in one direction, the articulation bends one way; when the motors reverse direction, the articulation bends the other way). Coupled to the tendons, which are made from a super strong synthetic fiber called Dyneema, is a spring-based nonlinear elastic mechanism. It allows the fingers to store and release energy -- again, just like our own hands do.

And why vary the stiffness of the fingers anyway? Because different situations demand different levels of stiffness. If you embed lots of springs and other shock-absorbing structures into your arm system, it will be able to withstand collisions, but when you try to pick a grape on a table it will vibrate and fail.

By varying its stiffness, the DLR system can perform well both in terms of robustness and accuracy. And it can perform tasks that other robots would have difficulty doing, such as using a hammer to drive nails on a wooden board. Watch:

The complete Hand Arm System is an engineering masterpiece. The shoulder has 3 degrees of freedom, and the elbow has 1 DoF. Each hand alone has 19 DoF, with two additional DoF on the wrist, which uses a "spherical antiparallelogram mechanism" powered by four motors, allowing for 30-degree side motion and 90-degree flexion/extension.

I mean, just look at this thing [photo, below]. It's crammed with motors, electronics, and cables, and yet it can endure vicious mechanical abuse without losing performance.

Now, it would be nice to see more dexterous manipulations. Can the DLR hand grasp objects of various sizes and shapes? Can you put two arms together and perform bimanual manipulations? Can a person wearing a sensor suit teleoperate the robot as the same DLR team has demonstrated with Justin?

I suspect the researchers will be working on some of these capabilities in the near future. One thing is certain, though: Expect more awesome videos from these guys. (UPDATE: As if to tease me, Grebenstein just send me the photos below.)

DLR Hand Arm System

DLR Hand Arm System cup

Updated May 13: Corrected explanation of Justin catching balls; added more photos.

Images and videos: DLR/IEEE Spectrum


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KURMET Bipedal Robot Can Hop Over Obstacles

KURMET biped robot

Bipedal robots, whether they're human-sized or not, are generally heavy and unstable and (with few exceptions) don't lend themselves to dynamic motions like running and jumping. Researchers from Ohio State University and the University of Notre Dame have developed an experimental biped called KURMET that's specifically designed for controllable, repetitive jumping*:

That big arm thing isn't being used to aid in the jumping at all, it's just there to simplify the system a little bit. Theoretically, it would be possible to do all of this research on an untethered fully three-dimensional robot, but for the purposes of figuring out how to make a robot hop in a stable manner, you only really need to focus on whether it's tipping forward or backward as it jumps. The “fuzzy” term that you see in the video is referring to how KURMET is controlled: The robot learns how to jump through a training process, not by remembering rules, so there isn't always a precisely pre-defined action that it's required to take based on given inputs, which is why it's called a fuzzy control system.

In the future, the researchers hope to apply evolutionary learning strategies to push KURMET's performance boundaries, which may or may not include doing flips and playing hopscotch.

The researchers -- Yiping Liu, Patrick Wensing, David Orin, and James Schmiedeler -- describe their work in a paper, "Fuzzy Controlled Hopping in a Biped Robot," presented yesterday at the IEEE International Conference on Robotics and Automation (ICRA), in Shanghai.

* Among the most incredible hopping machines ever created are the robots built by Marc Raibert and his team back when he was an MIT professor and directed the MIT Leg Lab. Raibert went on to co-found Boston Dynamics. Some of his robots are now on display at the MIT Museum.

PR2 Robot Can Scan And Bag Your Groceries

pr2 grocery checkout robot

Normally, when a robot wants to pick something up that it's never seen before, it either has to download a 3D model of the object, make its own 3D model and analyze it, or be trained by a human on the right way to grip. Unfortunately, none of these things are really practical to do in the fast paced world of grocery checkout lines.

Researchers at Stanford University have figured out that in order to pick something up, all you really need to know is whether a piece of it has the same basic shape as the shape of your gripper. If it does, then you can mostly likely grip it tolerably well, and experimentally the success rate is better than 90 percent. Best of all, you can extract this shape information from one simple (and quick) 3D scan, even if you've got a big cluttered pile of stuff. Once the robot has picked up an object, it holds it up to its cameras to scan for the barcode, adds it to your tab, and bags it for you. Watch a demo of their method implemented on a PR2:

Don't let the fact that this video is sped up by anywhere from 5x – 25x worry you; this is just research code. There's a lot of optimizing that could be done that could increase the speed by “several orders of magnitude,” according to the researchers. And while you probably aren't going to see PR2s down at your local Trader Joe's, the code that's being developed here could conceivably find its way into some kind of grocery robot in the future, or even into a robot that picks up and puts away stuff in your house.

The Stanford team -- Ellen Klingbeil, Deepak Rao, Blake Carpenter, Varun Ganapathi, Andrew Y. Ng, Oussama Khatib -- describe the research in a paper, "Grasping with Application to an Autonomous Checkout Robot," presented today at the IEEE International Conference on Robotics and Automation (ICRA), in Shanghai.

Mystery Robot Revealed: RoboDynamics Luna Is Fully Programmable Adult-Size Personal Robot

robodynamics luna personal robot

That mystery robot that we've been teased about for months now, originally rumored to be something developed by either Apple or Google, is in fact a project by a company called RoboDynamics. It's called Luna, it's a personal robot designed for people to use at home, it's fully programmable, and will start shipping later this year.

As of right now, the embargo has been lifted and we're allowed to tell you more about Luna and how RoboDynamics, in Santa Monica, Calif., hopes that it'll revolutionize robotics in the same way that the PC revolutionized computing and the iPhone and Android are revolutionizing mobile electronics.

Before we get to the overall concept, here's a rundown of Luna's hardware and software specs, which RoboDynamics says is subject to change:

Processor: Dual Core Atom 2 GHz
Graphics: nVidia 94000M
Storage capacity: 8 GB Flash, expandable to 32 GB
Wireless: Wi-Fi (802.11g), optional Bluetooth via Luna Expansion Port (LXP)
Cellular comm.: Optional 3G or 4G via Luna Expansion Port (LXP)
Operating system: LunaOS (includes Poky Linux, ROS, and other packages)
Display: 8" touchscreen capacitive LCD
Camera: 8-megapixel primary camera with digital zoom
Microphone: 3 microphone array with DSP front-end with sound localization
Speakers: Yes (no specs available yet)
Sensors: 10-bit wheel encoders, PrimeSense 3D Sensor
Expansion ports: Luna Expansion Ports (LXP) x 7 [Each LXP comprises standard USB Female Type A and 12 volt and 5 volt regulated power with mounting holes]
Battery: 12 volt, 26 amp-hour - SLA
Battery life: Between 4-8 hours
Charge time: 4-8 hours for full charge
Size: Height: 5'2" (157 cm) - Base: 22" (56 cm)
Weight: 65 lbs (30 Kg)

robodynamics luna personal robot

Clearly, this is not some kind of fancy, futuristic new platform. It's got a pretty good computer in it, with a pretty good graphics card. It's got some pretty good sensors, pretty good mobility, and pretty good design. All very pretty good. So why get excited?

Because, at least in principle, Luna could do something that no other robot has been able to accomplish: bring a programmable, general-purpose robot to a vast number of home users and establish an ecosystem for developers to create and sell software that gives the robot more capabilities.

Let's use the computer as an analogy. Starting with the Apple II (or thereabouts, our memory only goes back so far), it was possible to buy a computer system that would come out of the box offering immediate usefulness without requiring specialized technical knowledge. And that's what made everybody want a computer: it would immediately make your life better, and furthermore, the ability to teach it new things makes it increasingly useful.

robodynamics luna personal robot

To take the analogy further, and to get closer to the idea behind Luna, think about the iPhone. You buy it because it makes phone calls and you can get the Internet on it, but that's just the beginning. What makes the iPhone (and Android platforms) stand out from other phones is the fact that you can make it increasingly useful, thanks to the app store. And not just that, but making the iPhone useful by writing apps has become lucrative, which makes the iPhone itself more lucrative, and so on.

RoboDynamics CEO Fred Nikgohar and Luna Personal RobotRoboDynamics CEO Fred Nikgohar [the guy in the suit, right] wants Luna to do for robotics what smartphones did for mobile computing. He argues that the robotics industry has failed to make home robots (beyond toys, kits, and vacuum cleaners) available to consumers, and that even open-source software platforms like Willow Garage's ROS are still too hard for people without a PhD in robotics. He hopes that "a well-designed, open, and affordable personal robot will kickstart a rush of innovation."

We applaud the idea, but we see some hurdles along the way. RoboDynamics had mentioned previously a price tag of around US $1,000, which would make Luna a very competitive offering. To put that in perspective, remember that a TurtleBot or a Bilibot will set you back $1,200. And they're not five feet tall with touchscreens. But now RoboDynamics is saying that the $1,000 is a target price and that the initial model, to ship later this year, will sell for $3,000.

It's still reasonable for the hardware you're getting, but way above the psychologically appealing price point of $1,000, which would certainly entice a lot of people. So whether RoboDynamics will be able to bring the cost down is still uncertain.

Another issue is software. We haven't had a chance to check out the robot's Linux-based operating system, called LunaOS, and we haven't seen Luna's interface system, the SDK, and the Luna App Store that RoboDynamics says will be available. Software, perhaps even more than hardware, will be key to Luna's success. If the robot ships with good apps, and more apps start to show up on the store, Luna's appeal increases dramatically. But so far this is all a big question mark.

In the next few weeks, RoboDynamics plans to release more information about Luna's first edition, as well as future models, prices, and availability (if you're interested, go to their website and fill out the form). We'll report back as soon as we have a chance to meet the robot in person and check out its full capabilities.

More photos:

robodynamics luna personal robot

robodynamics luna personal robot

robodynamics luna personal robot

robodynamics luna personal robot

robodynamics luna personal robot

robodynamics luna personal robot

Images: RoboDynamics


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IEEE Spectrum's award-winning robotics blog, featuring news, articles, and videos on robots, humanoids, automation, artificial intelligence, and more.
Contact us:

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