Archimedes pointed out that with a lever he could move the world.
He most likely would have been surprised to learn that a team of six microrobots, weighing about 1kg in total, could pull a car weighing 1.8 tonnes.
A group of researchers at the Biomimetics and Dexterous Manipulation Laboratory at Stanford University has been exploring the limits of friction in the design of tiny robots that have the ability to pull thousands of times their weight, wander like gecko lizards on vertical surfaces or mimic bats.
COOPERATION
Now they have pushed biomimicry in a new direction. They have taken their inspiration from tiny ants that work as teams to move massive objects. In this case, they are not just taking ideas from nature — the movie Big Hero 6 made a great deal of what swarms of microrobots could do, including tossing cars.
The researchers’ approach is counter-intuitive. Rather than striking powerful blows like a football player making a tackle or a jackhammer, they have focused on synchronizing the smooth application of very tiny forces. The microrobots work in concert, if slowly.
The researchers observed that the ants get great cooperative force by each using three of their six legs simultaneously.
SUPERSTRONG
“By considering the dynamics of the team, not just the individual, we are able to build a team of our ‘microTug’ robots that, like ants, are superstrong individually, but then also work together as a team,” said David Christensen, a graduate student who is one of the authors of a research paper describing the feat.
The paper is scheduled be presented in May at the International Conference on Robotics and Automation in Stockholm.
Their new demonstration is the functional equivalent of a team of six humans moving a weight equivalent to that of an Eiffel Tower and three Statues of Liberty, Christensen said.
The car is the one he uses for commuting to campus. Part of the magic is the use of a special adhesive that was inspired by gecko toes.
SYNCHRONICITY
Last month, Christensen, who is a mechanical engineering graduate student, along with postdoctoral fellow Srinivasan Suresh, researcher Katie Hahm, and mechanical engineering professor Mark Cutkosky, published Let’s All Pull Together: Principles for Sharing Large Loads in Microrobot Teams.
In an accompanying video, they show that the microrobots, when they are carefully synchronized, can do astounding things.
Swedish campaigner Greta Thunberg was deported from Israel yesterday, the Israeli Ministry of Foreign Affairs said, the day after the Israeli navy prevented her and a group of fellow pro-Palestinian activists from sailing to Gaza. Thunberg, 22, was put on a flight to France, the ministry said, adding that she would travel on to Sweden from there. Three other people who had been aboard the charity vessel also agreed to immediate repatriation. Eight other crew members are contesting their deportation order, Israeli rights group Adalah, which advised them, said in a statement. They are being held at a detention center ahead of a
A Chinese scientist was arrested while arriving in the US at Detroit airport, the second case in days involving the alleged smuggling of biological material, authorities said on Monday. The scientist is accused of shipping biological material months ago to staff at a laboratory at the University of Michigan. The FBI, in a court filing, described it as material related to certain worms and requires a government permit. “The guidelines for importing biological materials into the US for research purposes are stringent, but clear, and actions like this undermine the legitimate work of other visiting scholars,” said John Nowak, who leads field
NUCLEAR WARNING: Elites are carelessly fomenting fear and tensions between nuclear powers, perhaps because they have access to shelters, Tulsi Gabbard said After a trip to Hiroshima, US Director of National Intelligence Tulsi Gabbard on Tuesday warned that “warmongers” were pushing the world to the brink of nuclear war. Gabbard did not specify her concerns. Gabbard posted on social media a video of grisly footage from the world’s first nuclear attack and of her staring reflectively at the Hiroshima Peace Memorial. On Aug. 6, 1945, the US obliterated Hiroshima, killing 140,000 people in the explosion and by the end of the year from the uranium bomb’s effects. Three days later, a US plane dropped a plutonium bomb on Nagasaki, leaving abut 74,000 people dead by the
Indian Prime Minister Narendra Modi is to visit Canada next week, his first since relations plummeted after the assassination of a Canadian Sikh separatist in Vancouver, triggering diplomatic expulsions and hitting trade. Analysts hope it is a step toward repairing ties that soured in 2023, after then-Canadian prime minister Justin Trudeau pointed the finger at New Delhi’s involvement in murdering Hardeep Singh Nijjar, claims India furiously denied. An invitation extended by new Canadian Prime Minister Mark Carney to Modi to attend the G7 leaders summit in Canada offers a chance to “reset” relations, former Indian diplomat Harsh Vardhan Shringla said. “This is a
RSS