The Mori3 modular origami robotic. Picture credit score: EPFL. Reproduced beneath CC-BY-SA.
By Celia Luterbacher
If the aim of a robotic is to carry out a operate, then minimizing the potential of failure is a high precedence relating to robotic design. However this minimization is at odds with the robotic raison d’être: methods with a number of items, or brokers, can carry out extra various features, however additionally they have extra totally different components that may probably fail.
Researchers led by Jamie Paik, head of the Reconfigurable Robotics Laboratory (RRL) in EPFL’s Faculty of Engineering, haven’t solely circumvented this downside, however flipped it: they’ve designed a modular robotic that truly lowers its odds of failure by sharing assets amongst its particular person brokers.
“For the primary time, we’ve got discovered a technique to reverse the pattern of accelerating odds of failure with rising operate,” Paik explains. “We introduce native useful resource sharing as a brand new paradigm in robotics, lowering the failure price with a bigger variety of modules.”
In a paper revealed in Science Robotics, the crew confirmed how exploiting redundant assets and sharing them regionally enabled a modular origami robotic to efficiently navigate a posh terrain, even when one module was utterly disadvantaged of energy, sensing, and wi-fi communication.
Sharing is caring
The RRL crew took inspiration for his or her innovation from nature, the place the issue of failure is usually solved collectively. Birds share native sensing data via flocking conduct, some bushes talk threats to neighbors utilizing airborne alerts, and cells repeatedly transport vitamins throughout their membranes in order that the demise of any particular person doesn’t considerably influence the general organism.
Modular robots, that are composed of a number of items that hook up with type an entire system, are analogous to multicellular or collective organisms, however till now, their design has been a supply of vulnerability: the failure of 1 module typically disables some, if not all, of the robotic’s potential to carry out duties. Some modular robots get round this downside with built-in backup assets or self-reconfiguration skills, however these approaches often don’t utterly restore performance.
For his or her research, the RRL crew used one thing known as hyper-redundancy: the sharing of all essential energy, communication, and sensing assets throughout all modules, with none change to the robotic’s bodily construction.
“We discovered that sharing only one or two assets was not sufficient: if every useful resource had an equal probability of failure, system reliability would proceed to drop with an rising variety of brokers. However when all assets had been shared, this this pattern was reversed,” Paik says.
In a locomotion job experiment with the Mori3 robotic, which consists of 4 triangular modules, the crew experimented with slicing battery energy, wi-fi communication, and sensing to the central module. Usually, this ‘lifeless’ central module would block the articulation and motion of the opposite three, however due to hyper-redundancy, the neighboring modules totally compensated for its lack of assets. This allowed the Mori3 to efficiently ‘stroll’ towards a barrier and contort itself successfully to cross beneath it.
“Basically, our methodology allowed us to ‘revive’ a lifeless module in a collective and produce it again to full performance. Our native resource-sharing framework subsequently has the potential to assist extremely adaptive robots that may function with unprecedented reliability, lastly resolving the reliability-adaptability battle,” summarizes RRL researcher and first writer Kevin Holdcroft.
The researchers say that future work may concentrate on making use of their useful resource sharing framework to extra advanced methods with rising numbers of brokers. Specifically, the identical idea may very well be prolonged to robotic swarms, with {hardware} diversifications that permit swarm members to dock to one another for vitality and knowledge switch.
References
Scalable robotic collective resilience by sharing assets, Holdcroft, Ok., Bolotnikova, A., Monforte, A.J., and Paik, J., Science Robotics (2026).
EPFL
(École polytechnique fédérale de Lausanne) is a analysis institute and college in Lausanne, Switzerland, that focuses on pure sciences and engineering.
EPFL
(École polytechnique fédérale de Lausanne) is a analysis institute and college in Lausanne, Switzerland, that focuses on pure sciences and engineering.
