% Error of Measure

Our lab was using computer program and ruler to measure the robot car’s distance on Friday, 1, 29,2016

We needed to compare the %  of Error between using computer program and ruler to measure it.

The formula of measured the % of Error is:

Measured distance = dm

Calculated distance = dc

                                    [ |dm-dc|\ [(dm+dc)\2] ] x 100%   

Our material :

1:  A ruler

2:  The computer program

3:  A Robot car

robot

4: A notebook and a pen (markdown the data)

First step:     We measured the long of Robot’s wheel.

The distance of wheel = 5.5 cm

The long of the wheel = 5.5×3.14

= 17.28cm

17.28cm = 1728mm

Second step:

Our team discussed to do the experiment for three times, and each experiment trail three time too.

Experiment of Robot

Final Step :

Calculated the Error of each experiment.

Experiment 1:

Trail 1: [ |0.275-0.270|/ [(0.275+0.276)/2] ] x 100% = 1.84% Error

Trail 2: [ |0.270-0.270|/ [(0.270+0.270)/2] ] x 100% = 0% Error

Trail 3: [ |0.273-0.272|/ [(0.273+0.272)/2] ] x 100% = 0% Error

Experiment 2:

Trail 1: [ |0.257-0.253|/ [(0.257+0.253)/2] ] x 100% = 0% Error

Trail 2: [ |0.256-0.255|/ [(0.256+0.255)/2] ] x 100% = 0% Error

Trail 3: [ |0.256-0.255|/ [(0.256+0.255)/2] ] x 100% = 0% Error

Experiment 3:

Trail 1: [ |0.298-0.294|/ [(0.298+0.294)/2] ] x 100% = 1.3% Error

Trail 2: [ |0.299-0.293|/ [(0.299+0.293)/2] ] x 100% = 2.03% Error

Trail 3: [ |0.299-0.295|/ [(0.299+0.295)/2] ] x 100% = 1.35% Error

This is our team experiment of Robot wheel.

I enjoyed this experiment.