While engineers have had success building tiny, insect-like robots, programming them to behave autonomously like real insects continues to present technical challenges. A group of Cornell engineers has been experimenting with a new type of programming that mimics the way an insect’s brain works, which could soon have people wondering if that fly on the wall is actually a fly.
The amount of computer processing power needed for a robot to sense a gust of wind, using tiny hair-like metal probes imbedded on its wings, adjust its flight accordingly, and plan its path as it attempts to land on a swaying flower would require it to carry a desktop-size computer on its back. Silvia Ferrari, professor of mechanical and aerospace engineering and director of the Laboratory for Intelligent Systems and Controls, sees the emergence of neuromorphic computer chips as a way to shrink a robot’s payload.
A simulation of the RoboBee stabilized in hovering flight using a biologically-inspired spiking neural network, which learns to adapt to manufacturing irregularities in real time.
Unlike traditional chips that process combinations of 0s and 1s as binary code, neuromorphic chips process spikes of electrical current that fire in complex combinations, similar to how neurons fire inside a brain. Ferrari’s lab is developing a new class of “event-based” sensing and control algorithms that mimic neural activity and can be implemented on neuromorphic chips. Because the chips require significantly less power than traditional processors, they allow engineers to pack more computation into the same payload.
Ferrari’s lab has teamed up with the Harvard Microrobotics Laboratory, which has developed an 80-milligram flying RoboBee outfitted with a number of vision, optical flow and motion sensors. While the robot currently remains tethered to a power source, Harvard researchers are working on eliminating the restraint with the development of new power sources. The Cornell algorithms will help make RoboBee more autonomous and adaptable to complex environments without significantly increasing its weight.
“Getting hit by a wind gust or a swinging door would cause these small robots to lose control. We’re developing sensors and algorithms to allow RoboBee to avoid the crash, or if crashing, survive and still fly,” said Ferrari. “You can’t really rely on prior modeling of the robot to do this, so we want to develop learning controllers that can adapt to any situation.”
To speed development of the event-based algorithms, a virtual simulator was created by Taylor Clawson, a doctoral student in Ferrari’s lab. The physics-based simulator models the RoboBee and the instantaneous aerodynamic forces it faces during each wing stroke. As a result, the model can accurately predict RoboBee’s motions during flights through complex environments.
“The simulation is used both in testing the algorithms and in designing them,” said Clawson, who helped has successfully developed an autonomous flight controller for the robot using biologically inspired programming that functions as a neural network. “This network is capable of learning in real time to account for irregularities in the robot introduced during manufacturing, which make the robot significantly more challenging to control.”
Aside from greater autonomy and resiliency, Ferrari said her lab plans to help outfit RoboBee with new micro devices such as a camera, expanded antennae for tactile feedback, contact sensors on the robot’s feet and airflow sensors that look like tiny hairs.
“We’re using RoboBee as a benchmark robot because it’s so challenging, but we think other robots that are already untethered would greatly benefit from this development because they have the same issues in terms of power,” said Ferrari.
One robot that is already benefiting is the Harvard Ambulatory Microrobot, a four-legged machine just 17 millimeters long and weighing less than 3 grams. It can scamper at a speed of .44 meters-per-second, but Ferrari’s lab is developing event-based algorithms that will help complement the robot’s speed with agility.
The Latest on: Insect-like robots
Insect-Like Swarm Robots Ready for Mass Production
on May 16, 2018 at 5:00 pm
Autonomous swarms of robots capable of exploring dangerous terrains soon could be deployed in disaster areas like earthquakes now that engineers have developed a method to mass produce them. Students at the Delft University of Technology in the Netherlands ... […]
These Tiny, Mindless Robots Are More Than the Sum of Their Parts
on May 16, 2018 at 10:36 am
This means the researchers have found a way to create insect-like emergent behaviors in robots, which could prove valuable when studying these types of behaviors in real insects. In addition, getting a better handle on how to make these types of behaviors ... […]
This insect-sized wireless robot flies with help of lasers
on May 16, 2018 at 9:56 am
A tiny, insect-like robot that operates without the need for an external power source has been developed by scientists. Called RoboFly, the gadget is powered by a laser that activates an on-board circuit to flap its wings. The researchers say bots like it ... […]
Laser-powered flying robot insect takes flight
on May 16, 2018 at 4:56 am
Scientists from the University of Washington have developed a minute android with tiny insect-like wings that doesn’t need wires or a battery pack to take flight. Instead, the bug-sized robot, dubbed RoboFly, is powered by a laser beam being fired at a ... […]
Researchers used laser to make the wireless robotic insect take off
on May 16, 2018 at 12:33 am
Miniscule flying robots could be an essential help to solve time-consuming, as well as critical tasks like sniffing out gas leaks. However, they’ve been quite tricky to get off the ground. Any wind-flapping insect-like robot needs a power source ... […]
RoboFly Is the First Wireless Insectoid Robot to Take Flight
on May 15, 2018 at 1:34 pm
However, propellers lose effectiveness at a certain point as you miniaturize them. If you want an insect-sized flying robot, an insect-like style of flight might be the best option from a physics standpoint. Flapping wings use more energy, though ... […]
The U.S. Military Wants Giant Transformer Robot Subs
on May 2, 2018 at 11:05 am
The Aquanaut unmanned underwater vehicle, or UUV, can chug beneath the ocean’s surface for hundreds of kilometers and then transform into a vaguely insect-like robot to perform delicate operations in the watery depths. Its biggest backers are players in ... […]
via Google News and Bing News