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August 8 2022

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Carnegie's feline robot puts his tail (and gains a lot of agility)

A robot with a tail? So far loser idea: heavier and more expensive. Then the Carnegie researchers started studying a cat, the cheetah, and the game changed.

Gianluca Ricciodi Gianluca Riccio
in Robotica
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feline robot
April 21 2021
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Nature can be incredibly helpful when it comes to solving complex human problems - I've often talked about biomimetics on these pages, and I'm proud of it. In this case, the light, streamlined tail of a feline, the cheetah, allowed scientists to overcome a problem in robotics, according to a study published in IEEE Transactions on Robotics .

Are you surprised that cats can be so useful to engineers? You shouldn't be.

Many big cats move with great precision and agility, even at high speeds. In part, it's thanks to their tails. Until now, the same thing could not be said about robots: adding a tail to a robot can lead to disadvantages such as greater mass, higher energy cost and high inertia (the resistance of an object to any variation of its speed). But, but… now it seems that things have changed.

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A problem of inertia

feline robot
Coda, a precious ally of the feline. And from today of the robot.

While most robotic tails have high inertia, the cheetah's tail uses drag to gain strength with little inertia. According to the researchers of the Robomechanics Lab from Carnegie Mellon University, who work in collaboration with the University of Cape Town, an aerodynamic tail (very similar to that of the feline) could improve robotic mobility.

Robotic tails have always produced great inertia due to their simplicity, but nature already knows there are better ways to stabilize agile movements.

In the paper, the researchers compared aerodynamic and inertial feline tails to build an equally effective robotic tail.

This research suggests that following nature's inspiration results in equally effective tails for a fraction of the weight.

From an excerpt from the research paper

Feline tail, more agile robot

Underlining the effectiveness of the tail in improving the robot's agility and giving it better control over its movements, the researchers point out that the feline's 'emulated' tail has the advantage of being much lighter.

Sure, the robot's mass has increased, but the research team found that a robot with a tail can accelerate faster than a robot without a tail. “The tails help stabilize the robot, which is critical when performing difficult maneuvers. We believe that improving robot agility will make our robots better at helping people outside of the lab, ”Norby said.

A truly feline jerk for robotics, I'd like to say. Anyway, here's the robot in action below:

tags: biomimeticsfelinesrobot
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