Engineering 103 –UMass Boston

CW 10

(In-Class-Work 10)

a) Make a VI that can plot any function between 0 and 4 (using N=101 points, for example). Use LabVIEW For Loop, Eval Single-Variable Array (under G Math/Parsers VI in version 5.0 or Mathematics/Formula/Advanced Formula Parsing in versions 6.0 and higher), and Bundle (under Cluster) to tell the Waveform Graph the initial value, increment for t (the function’s argument), and values of the function. Use cos(t) as the input function to be plotted. Click on the Light Bulb in the Diagram, and then click Run to see how the For Loop and the program work. Print a copy to submit.

b) Make another VI by modifying the VI in a) such that it uses only 5 points. Note the difference. Then use trial-error method to see what is the smallest number of points that makes the graph look like your actual function. Save the VI after doing Operate/Make Current Values as Default with this smallest number of points, into a cw10_lastname library. Print a copy to submit.

c) Use the table of 10 data points obtained from CW 9; make a VI that plots the array for t against the array for v0. Label your axes. Use Array, Bundle, and XY graph (if you use “Express XY Graph, then the bundle is not needed since it comes included in the Graph). Save the VI after doing Operate/Save Current Values as Default, into the same library as in part b). Print a copy to submit.

*Remember that this is an individual work (turn it in, as instructed, with your name and date). Home-works and class-works count 20% toward the course grade. Class-works are done in class.