Sports
MIT builds a very accurate and powerful table tennis robot
Researchers from the Massachusetts Institute of Technology (MIT) have developed a robot system that can reduce high precision and accuracy table tennis balls. The table tennis robot can perform three different types of shots and would be the fastest in the world.
In the core, the robot system for playing table tennis consists of a multi-grade robot arm with an extra degree of freedom for the “wrist”. The robot is attached to one end of a conventional table tennis table. The balls are observed and the robot is checked externally. Different high -speed cameras that are divided around the table check the ball movements. The researchers developed optimized control algorithms to determine the speed and orientation of the racket with which the table tennis ball must be returned. The robot is capable of a total of three types of strokes: loop (also known as top spin), Drive (for straight strokes) and Chop (Backspin), as can be seen from the study “High Speed Robotic Table Tennis Swinging with Lightweight Hardware predicting control”, which is published as a pre -print on.
Accurate and powerful
A total of three computers are required to process the camera images, to assess the ball movement in real time, to convert these reviews into a battle movement and to have them implemented by the electric motor-driven robot arm. The robot can not only predict how an incoming ball will hit, but the system can also calculate an exact target position for the returned ball and place precisely in the generic field of the table tennis table.
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The video shows how the table tennis robot gradually improves with its impact speed.
The researchers tested the table tennis robot by hitting 150 balls after the other in the direction of the robot. Depending on the type of shot, the robot returned the balls with an approximately equal hit percentage: 88.4 percent for loop attacks, 89.2 percent for pork chops and 87.5 percent for discs.
After optimizing the percussion rhythm and reaction time, the robot balls could go back at a speed of 20 m/s. According to the researchers, the robot achieves this faster than any other table tennis robot in the world.
On average, the robot reaches a battle rate of 11 m/s. Experienced human players can touch table tennis balls between 21 and 25 m/s. According to the MIT researchers, they could increase the average battle rate to 19 m/s by further optimizing the system after publishing the results.
Nevertheless, the table tennis robot has its limits. For example, it only has limited mobility and reach. The robot can only return balls that arrive in a half -shaped area around the center line of the table. The researchers want to prevent this in the future by mounting the robot arm on a mobile platform. The aim is to extend the range of the robot, so that it can cover a larger part of the table tennis table and return balls with a larger variety.
(OLB)
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