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The field of soft robotics has attracted a rush of attention in the last year. Down the road at Harvard, multiple groups are working on soft robotic hands, jumping legs, exosuits, and quadrupeds that can do the limbo. At Worcester Polytechnic Institute's Soft Robotics Lab, researchers are building a snake. In San Francisco, a startup called Otherlab is buildinginflatable robots that can shake hands, walk, and carry riders. In Italy, a group of researchers built a robotic tentacle modeled after an octopus.
Before the 1970s, car companies made cars safer by making them larger and heavier. Then along came the airbag: a lightweight safety device that folded up invisibly into the vehicle until it sensed a crash. Similar revolutions took place with body armor, bridges, and contact lenses, and these researchers believe something similar is happening with robots.
"It’s not a part of conventional robotics technologies," says Fumiya Iida, a professor of bio-inspired robotics at the Swiss Federal Institute of Technology-Zurich and a member of the IEEE committee on soft robotics. "They have to think completely differently, use different materials, different energy sources. Definitely this is the way we should go in the long run." One of the most impressive rigid robots in the world right now is Boston Dynamics’ 300-pound humanoid Atlas. If Atlas wants to pick up a ball, it needs to sense and compute the precise distance between its digits and the ball and figure out exactly where to place its hand and how much pressure to apply.
Robots like Atlas "are doing a lot of thinking," says Barry Trimmer, PhD, a professor at Tufts and the editor of a new journal, Soft Robotics, which launched last month. "There’s a lot of hesitancy. ‘Where do I put my foot next?’ Animals just don't do that. We need to get away from the idea that you have to control every variable."
By contrast, Harvard’s starfish-shaped soft gripper only needs to be told to inflate. As it’s pumped full of air, it conforms to the shape of an object until its "fingers" have enough pressure to lift it. Another example would be a human picking up a glass of water. We don’t have to compute the exact size and shape of the glass with our brains; our hand adapts to the object. Similarly, Bubbles doesn’t calculate the full length of its movement.
There are technological challenges as well. In addition to air and fluid pressure actuators, soft roboticists are experimenting with dielectric elastomers, elastic materials that expand and contract in response to electric voltage; shape-memory alloys, metal alloys that can be programmed to change shape at certain temperatures; and springs that respond to light. These approaches are still rudimentary, as are the control systems that operate the robots. In the case of many of Harvard’s soft robots, it’s simply a syringe of air attached to a tube.
The field is so new, however, that no possibilities have yet been ruled out. Soft robotics technologies could theoretically be used in a wearable pair of human wings.More practically, soft robots could easily pack eggs or pick fruit — traditional hard robots, equipped with superhuman grips, are more likely to break yolks and inadvertently make applesauce. A mass of wormlike "meshworm" robots could be filled with water and dropped over a disaster area, where they would crawl to survivors. A soft robotic sleeve could be worn to eliminate tremors or supplement strength lost with age. Soft robots could be used in space exploration, where weight is hugely important; in prosthetics, where they would provide comfort and lifelikeness; in the home, where they can help out around the house without trampling the dog; and in surgical robots, where operators have inspired a few lawsuits after puncturing patients’ insides.
Makes you wonder how on earth earth such misguided studies can even be commissioned. Also makes you curious about who is really behind the funding of research that misleads readers into believing that poor kids don’t need the same tools their wealthier peers use for success.
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An Australian teenager's simple idea that would allow a complete quadriplegic to control a wheelchair by voice has earned her international recognition and a top science award for school students, handed out by Commonwealth science agency CSIRO.
Sony’s executives believe that in ten years’ time, video games will have the ability to read more than just movement on the part of the player: “Having a camera being able to study a player’s biometrics and movements [is possible] so perhaps you can play a detective game that decides whether you’re lying due to what it reads from your face,” said Mike Hocking, a senior director at Sony Worldwide Studios. “In ten years’ time I’d like to think we’ll be able to form a map of the player, combining other sorts of sensory data together, from facial expressions to heart rate. “You can see how, over a period of time, you can form a map of the player and their emotional state, whether they’re sad or happy. Maybe people in their social network can comment on it. The more accurate that map can become, the more we can tailor it to the experience.
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