Robot Design - ENGR 102 Winter 2011 Freshman Engineering...

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ENGR 102 - Winter 2011 Freshman Engineering Design Lab Lego NXT Design Summary ENGR 102 Section 009, Group 2 Date: January 31, 2011 Submitted to: Eli Fromm and Pramod Abichandani Team Members: Evan Kahl John VanZelst
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Summary of Tasks In order to successfully navigate the arena, the Lego robot will have to be able to interact with its environment to determine which commands to execute. The seemingly simple process of identifying a colored button and pressing it is easy for human action, but much more difficult to recreate in artificial intelligence. In order to work, the large process needs to be broken down into simpler tasks that are manageable to code for. A basic summary of these tasks are as follows: 1. Primarily, the robot will have to be able to recognize the wall of the arena and follow it within a certain distance. In order to follow the wall, the robot will have to measure its actual distance from the wall (using an ultrasonic sensor), calculate the distance error, and then use the error to proportionally correct how much it needs to turn in order to achieve the correct position. The accumulation of these tasks will allow the robot to traverse the walls of the arena. (See below code) 2. The next objective of the robot is to identify the corners of the arena (using a touch sensor) and execute a turning command when the touch sensor is depressed. The primary loop of the robot is the wall following command, but this string is broken when the touch sensor is depressed. When the sensor is depressed, the robot starts to execute a command that backs up the motors and then performs an arc turn. The code then returns to the wall following loop.
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