LAB #3 report. MAE 106. UCI. Winter 2005
Nasser Abbasi, LAB time: Thursday 1/27/2005 6 PM
The motor velocity control system acts as a low pass filter.
The cutoff frequency used was
From the 3 data files, I generated 3 plots. One for and one for and one for
From looking at the 3 plots, I see that the output of the tachmeter shows the amplitude is decreasing as the input (function generator) frequency is increasing. This means the controller acts a a low pass filter.
Below are the 3 plots geneated showing on each the actual and the velocity.
To make more clear, I also plot on the same plot, how the actual velocity changes as the input frequency changes.
This is the result.
Divide by
for , hence we get
But for ,
hence
Hence this shows that by using feeback, and by using very large gain we can eliminate the effect of the disturbances.