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Posts Tagged ‘robots’

Jellyfish-Like Flying Machines

Jellyfish-;ike robot

Credit: Dr. Leif Ristroph / NYU

Researchers have built a small vehicle whose flying motion resembles the movements of a Jellyfish.

inventor Dr. Leif Ristroph, a postdoctoral researcher at New York University, wanted to determine if he could invent a winged flying machine that was inherently stable, with no sensors or artificial nervous system needed. After trying several designs, he ended up creating a cone-like machine made of four wings that are hinged at the top approximately 3 inches (8 centimeters) long, surrounding a small motor, a commercially available component about the size of the vibrator in a cell phone and which accounts for about half the mass of the device. The motor, located at the at the top, opens and closes the wings together not-quite-simultaneously at a rate of 20 times a second.

Other flying robots, like the tiny robotic bee built at Harvard’s Wyss Institute, or the H2bird flapping-wing drone built at a lab at Berkeley, sense the direction and location and adjust their movements to stay in the air. But the lightweight, electrically powered flyer keeps itself right side up without the benefit of sensors or any righting mechanism. Instead, the stability is a result of the shape and the movement of the wings.

Dr. Ristroph and his colleagues detailed their invention in the January 15th in the Journal of the Royal Society. They also presented the robot at the 66th Annual Meeting of the APS Division of Fluid Dynamics last November. In addition to showing that the flying device is stable, Ristroph and Stephen Childress, also at NYU, found that the size of the machine mainly depends on the weight and power of the motor.

“What’s cool is you can actually build these flying things yourself,” Ristroph told LiveScience. “All the components I used to make this, they cost about $15 and they’re available on hobby airplane websites.”

The top figures illustrate the body and wing design; the bottom figures detail the motor assembly (left), and the wingspan assembly (right).

The top figures illustrate the body and wing design; the bottom figures detail the motor assembly (left), and the wingspan assembly (right). Images © Journal of The Royal Society

The prototype doesn’t include a battery, so the ornithopter, as they call it, requires a wire for power. More engineering work is necessary to get power and a radio receiver onboard so that an operator can control the ornithopter from a distance. It also can’t steer, either autonomously or via remote control.

You can view a YouTube video of the ornithopter in action here.

Science Hacks Our Fiction (And The Feeling Is Mutual)

Science fiction loves robots to pieces, but fortunately for genre writers and fans, the feeling is mutual. Engineers and scientists are working near-miracles in the robotics field, and the fruits of their labor are ripe for fiction’s picking. 2012 is still young by most accounts, yet this year robots have already grown tails and scales, acquired aerial speed limits, and learned to swim like a boss. Next they’ll be popping-up in swarms and colonizing our eaves. Or better yet: We’ll wear them on our hands to reduce the repetitive stress injuries we’re causing ourselves by trying to write ever-cleverer new robots into science fiction faster than actual science can render the bots of our dreams obsolete.

Probably the only way we writers can keep up with – or even hope to outpace – the current rate of robotic development is by imagining new purposes and roles for robots. It’s unlikely that scientists and engineers will ever stop endeavoring to simulate humanity and integrate androids into society, as lofty as that goal is. But if real bots must eventually look like and learn like humans, the least we can do is give readers more interesting robots to read about than the one that sweeps floors and amuses cats, or the android in the kitchen with Dinah. We already use droids for offense and defense, manufacturing, and surgery. Robotic search and rescue is a high priority for research and development, and it looks like construction may soon be crawling with bots. So what frontiers does that leave fiction to explore?

Plenty. The world already includes many different kinds of robots with different functions and forms, and the diversity of artificial ‘species’ will only continue to expand (even as natural diversity contracts at an alarming rate). As robots abound, they will inevitably need to interact well with natural species and with each other in order to satisfy human demands. They’ll need to function optimally with a minimum of human guidance, and endure at times in spite of human intervention. Face it: We abuse our tools and hack our toys. Robots need to be resilient just to survive life among humans. There’s enough fodder for stories in those last few sentences alone to keep an author busy for the length of a so-called Golden Age of fiction…

The strange android had stepped from behind an overgrown bougainvillea and disabled their Guardians before they’d even known it was there. “Remain calm, children. I won’t hurt you.” It spoke like a classic film actress, its voice a disarming combination of cultured and flinty that the boys recognized from their seventh grade film history elective but had never heard in person. Read an excerpt from ‘Parent Hack’ by Kay T. Holt