Researchers Build Flying Robot

Researchers say they have assembled a flying robot. It’s not designed to fly like a bird or an insect, but was built to simulate the movements of a swimming jellyfish.

Scientists at New York University say they built the small, flying vehicle to move like the boneless, pulsating, water-dwelling jellyfish.

Leif Ristroph, a post-doctoral student at NYU and a lead researcher on the project, explained that previous flying robots were based on the flight of birds or insects, such as flies.

Last spring, for example, Harvard University researchers announced that they had built an insect-like robot that flies by flapping its wings. The flying robot is so small it has about 1/30th the weight of a U.S. penny.

Before the Harvard work was announced, researchers at the University of Sheffield and the University of Sussex in England worked together to study thebrains of honey bees in an attempt to build an autonomous flying robot.

By creating models of the systems in a bee’s brain that control vision and sense of smell, scientists hope to build a robot that would be able to sense and act as autonomously as a bee.

The problem with those designs, though, is that the flapping wing of a fly is inherently unstable, Ristroph noted.

“To stay in flight and to maneuver, a fly must constantly monitor its environment to sense every gust of wind or approaching predator, adjusting its flying motion to respond within fractions of a second,” Ristroph said. “To recreate that sort of complex control in a mechanical device — and to squeeze it into a small robotic frame — is extremely difficult.”

To get beyond those challenges, Ristroph built a prototype robot that is 8 centimeters wide and weighs two grams. The robot flies by flapping four wings arranged like petals on a flower that pulsate up and down, resembling the flying motion of a moth.

The machine, according to NYU, can hover and fly in a particular direction.

There is more work still to be done. Ristroph reported that his prototype doesn’t have a battery but is attached to an external power source. It also can’t steer, either autonomously or via remote control.

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FCC Warns Against Jammers

The U.S. Federal Communications Commission has issued warnings to 20 online retailers offeriing illegal mobile phone jammers, GPS jammers, Wi-Fi jammers and other signal jamming devices, the agency said Wednesday.

The sale and use of devices that jam the signals of authorized radio communications are illegal in the U.S., the FCC said in its enforcement action. The agency will “vigorously” prosecute violations going forward, it stated in a press release.

“Our actions should send a strong message to retailers of signal jamming devices that we will not tolerate continued violations of federal law,” Michele Ellison, chief of the FCC’s enforcement bureau, said in a statement. “Jamming devices pose significant risks to public safety and can have unintended and sometimes dangerous consequences for consumers and first responders.”

Jammers, sometimes used in classrooms, theaters and churches, are prohibited because they can prevent individuals from contacting police and fire departments or family members during an emergency, the FCC said. “Use of jamming devices can place you or other people in danger,” the agency said.

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