Robot challenger for the record decides Rubik's cube in 1.1 seconds

    The solution of the Rubik's cube for speed is almost a standard discipline. The decisive look does not interrupt anything, he perfectly sees the classic 3 × 3 × 3 cube. All this allows you to achieve a great time, from year to year the results are getting better and better. The speed limit is largely limited by the physical characteristics of the puzzle: it must be rotated so that it does not stick and does not shatter into pieces. People really work out the solution to automatism, but physical restrictions are especially true for cars.



    Jay Flatland and Paul Rose created their own version of the robot to solve the puzzle. She is able to solve it in about 1.1 seconds, which gives the inventors a reason to claim the record.

    The problem statement for solving the Rubik's Cube is reflected in the rules that are created by the organization registering the record. For example, according to WCA, the cube must be mixed in a special way , and the modifications of the cube and model are regulated. After receiving the cube, the participant can start the decision. In the case of a machine, the actual calculations take a negligible amount of time. Most part is occupied by the movement and rotation of the faces of the cube. But there can never be more than 20 movements — such is the number of God .

    In this particular case, the Kotsemba algorithm was used, 4 webcams and 6 stepper motors. Four USB cameras record the cube configuration. Data comes to a regular personal computer running the Linux family of operating systems. The application program calculates the state of the cube, receives a solution from the implementation of the Kotsemba algorithm, and controls the motion process. Stepper motors rely on a frame created using a 3D printer. At their ends are small printed legs, through which contact is made with the puzzle. The cube itself is slightly modified: in the central segment of each of the faces 4 tiny holes are drilled, where these legs enter at the ends of the engine axes. Motor drivers are driven by an Arduino chip.

    The result is a solution to the Rubik's Cube in a little over 1 second. A typical result is around 1.1 seconds. For demonstration, Flatland covered one of the cameras with a sheet of paper and accidentally mixed the cube. The robot solved the puzzle in 1,047 seconds.

    At the moment, the record among bags of meat of people belongs to the American teenager Lucas Etter. He set it in the fall of 2015, solving the puzzle in 4.9 seconds. The record is registered by the World Cube Association, an organization that regulates Rubik's Cube competitions.



    In 1982, a record among people was considered a result of 19 seconds - almost four times longer. Robots also improve their performance well. For example, in 2011, CubeStormer 2 was able to cope in a little over 5 seconds . In 2014, CubeStormer 3 brought each facet of the cube to one color in 3.253 seconds . Now in the "Guinness Book of Records" recorded robo-result in 2.39 seconds.



    The one-second car record has yet to be registered. So far, there is only a video demonstration presented before kata.

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