Lego Robotics Activity

One of our first assignments for this class (Contemporary Science and Innovation) was to assemble a lego robot with the materials given to us by our professor. We were given detailed instructions of how to assemble the Lego Mindstorm NXT robots which took approximately 30 minutes for myself and my partner Tania, by using the robots this helped explain sustainability. Assembling the robots was easy apart from several pieces missing from the materials in which we had to substitute for with other parts to ensure the robot worked properly. The following class we then connected our robots to the computer where we programmed different operations using LabView. Although LabView seemed confusing at first the detailed instructions from our professor allowed us to have a proper insight into how LabView works with the lego robot. While using LabView it became more difficult to program the robot to do exactly what we wanted it to do, this was my first time using this program and I was unfamiliar with some of the inputs. However, through trial and error it became interesting to see what the robot could and could not do through LabView. 

The robot was programmed to make moves such as moving straight, to turn right, to turn left and to go around in a full circle. After this we became more advanced with the program and we were able to make the robot play a song while making maneuvers. We then measured distance and velocity with our results varying. 

The two large wheels at the back of the robot is how we measured the circumference. 

The results from our wheels: 2.4in = 0.06096m 

Calculating circumference: Pi(diameter) > 3.14(0.06096) = 0.19141

After this calculation we recorded our results on LabView. 

Following this we then inputed this into LabView where the robot was able to move from the commands through the computer. Our robot drove around on the desk before stopping. Our robot rotated 2 times and then came to a halt. The 2 rotations equaled … m 

Our wheels spun for about 8 seconds = 8,000 milliseconds. 

We then measured the distance in which the robot had travelled, which was 0.23m. 

LabView measured 0.253213 m.

Percentage Error: |0.23 – 0.253213| / (0.23 + 0.25) / 2 x 100 

Overall the experiment using lego robots was enjoyable and I believe I learned a significant amount of information. 

Below is the Lego Robot fully assembled. 

Completed Robot

23 thoughts on “Lego Robotics Activity”

  1. We seem to have gotten very similar results with regards to our margin of error. I found it interesting that you measured for how long the robot turned. This could be used to calculate rotations per minute and a host of other values.

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