Engin 103 –UMass Boston
Write due date here ________________
Effective written communication
1.- Prepare a typed summary written documentation based on your logbook enumerating the different things (not less than three and not regarding LabVIEW elements and applications) that you have learned so far in this course. Choose a particular one that you like the most and describe it in details, i.e., you are to show the reader that you really learned that thing by clearly explain: its purpose; its method and how you learned it; describe a specific example; your conclusion including showing at least another situation in which you will be able to use this knowledge. 1 page at single spacing, 12pt font, 1 in margins.
2.- Prepare a complete list of LabVIEW related things that you have learned in this course. For each entry, explain purpose and method of doing it (including where you can find the icon, etc). The list should contain at least 7 entries. 1 pages at single spacing, 12pt font, 1 in margins.
LabVIEW design problems
3.- Design a LabVIEW Virtual Instrument based on the one created from a previous CW to:
-Take three input frequencies; starting point; end point; number of points
-Plot the three cos with given frequencies and their sum.
-Plot the FFT (Fast Fourier Transform) of the sum (this is a LabVIEW built-in sub VI, also use an “Absolute Value” or “Magnitude” operation before plotting.
(Optional: The horizontal axis should show the same number of points given as input but run between –(the max. frequency) and +(the max. frequency). This involves the use of maximum operators. So the increment is twice the ratio between the max. frequency and the number of points)
To turn in, use as starting and end points –62.8 and 62.8; and 512 points (note that FFT works better with numbers of points equal to a power of 2); and frequencies of 1; 0.5; and 0.25. Make sure you see three peaks in the FFT plot (there are also three peaks in the negative frequencies but they are just artificial). Put your name in a text box, run, an copy the front panel and diagram to the hw6_lastname Word file to submit.
With this VI you are doing signal processing; the FFT of the sum of the three cos signals show the spectrum containing three frequencies corresponding to those of the three components of which the sum was formed. Play with it!