My class and I recently completed a lego robot car experiment. In the first part of the experiment we had to build the car by following instructions online and then we put a electronic battery attached to a small computer on the car. This small computer(car) had USB cords attached to itself from a computer. We used the computer to program the robot car with commands so it would be able to move. The purpose of this experiment was to test the velocity, acceleration and distance traveled by the car, while making 1 complete revolution, or circle. The robot car below is a close resemblance as to the one we used in class.
For the second part of the lab experiment we were supposed to make the robot do 1 complete revolution. To accurately do this we had to measure the distance that the wheels traveled, speed at which the car traveled, measure the diameter of the wheel and compute the circumference, record the number of degrees that the wheel rotated in comparison to the number of turns the wheel committed, record the time it took for the wheels to turn, and in order to make the car do a perfect circle inside the circumference of 2 feet we did multiple attempts with the motors at different power levels.
The results are as follows for our final attempt:
Degrees of rotation for wheel one: 471
Degrees of rotation for wheel two: 472
Number of wheel turns: 1.30833
Distance traveled: .24649 meters
Velocity: .08216 M/S
Time it took: 3 seconds
Power level of both motors: 25
Circumference: .1884
The results to the
This experiment was a fun, but tricky one. Like Chris said, there were multiple attempts at varying powers to nail down a diameter of two feet. Looking at various students blogs, and this one, it is clear that most of us had a similar struggle.