US researchers announce "blind" robot technology details
Author: Zhou Zhou Release Date: 2018-07-10
Xinhua News Agency, Washington, July 7th, the Massachusetts Institute of Technology recently issued a communique saying that the school's researchers recently released the technical details of a "blind" robot. This type of robot does not require a visual system to travel through rugged terrain and is expected to be widely used in hazardous work environments.
The communique said that the "Cheetah 3" robot weighs about 41 kilograms and is the size of an adult Labrador. The researchers said that the "Cheetah 3" was tested from 2017 to further improve its functionality.
The researchers pointed out that they developed two new algorithms, "tactile sensing" and "pattern predictive control." The "tactile sensing" algorithm controls the take-off and landing of the "Cheetah 3" limbs, and determines the best time for a leg to swing and fall to the ground according to the softness and hardness of the ground material.
The researchers say the data comes from gyroscopes, accelerometers, and the position of the robot's leg joints, which are used to record the angle and height of their legs relative to the ground. If the robot steps on the wooden block, its body will suddenly tilt, causing the robot's angle and height to change. The "tactile sensing" algorithm will synthesize the data and judge that each leg should be lifted, landed or swung to maintain balance.
The "pattern predictive control" algorithm is used to determine the amount of force that each leg needs to apply. According to this algorithm, if a certain force is applied to any one leg of the robot, the position of the body and legs of the robot in the next half second can be calculated. The researchers say that the "pattern predictive control" algorithm can perform a calculation for every 50 milliseconds per leg (1 second equals 1000 milliseconds).
In the experiment, the researchers kicked or pushed the robot that was jogging on the treadmill, or when the robot climbed on the steps that were all obstacles, the researchers used the belt to yank the robot and found that the "pattern predictive control" algorithm Both can make the robot regain body balance and move on.
The researchers plan to demonstrate the blinding ability of "Cheetah 3" at the International Intelligent Robotics and Systems Conference held in Madrid, Spain in October this year.
Source: Xinhuanet
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