Comment of the Day: Wobbly Robot Edition

Today ’s Comment of the Day of the come to us via a crooked path , delivered to us by a blindfolded robot . In response to a spot on thedifficulty human being have in walking a straight line blindfolded , commenterjshoershares with us that robots have the same problem :

https://gizmodo.com/think-you-can-walk-in-a-straight-line-blindfolded-gue-1387016277

We encounter the same problem in robotic scheme that swear on an inertial measurement unit ( IMU ) , which evaluate the quickening and revolution pace of a vehicle . IMUs are in all sort of robotlike navigation systems , from pilotless aircraft to spacecraft – not to mention smartphones . However , if the IMU is the only sensor going into a robot ’s ascendence organization , thenany errors present will build up over time . Often , the position or orientation approximation built from IMU data seem like arandom pass process . The bottom line is that the position and orientation of the fomite will lento drift off from where we want it to be and where we want it to manoeuvre . We work the problem of drift errors by tally detector that measure an international address : GPS , light sensors , radar , lidar , sonar , vision processing , and so on . You actually do n’t need those external references all the time ; occasional , periodic “ updates ” are enough to correct the IMU performance sufficiently .

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