Engineering 103 –UMass Boston

CW 8

(In-Class-Work 8)

Make a VI that solves two equations with three unknowns (impossible to do analytically since there are more unknowns than equations): initial height h0, initial speed v0, and total time of flight t when a solid object of mass m (no helium) is launched vertically up from h0 at v0, and without reaching a maximum height falls back to hit the ground. For equation and additional info, check links regarding “Time-of-flight with LabVIEW” in the electronic syllabus. The maximum height is 2.75m, so for each initial height h0, there will be a maximum value for v0. When a v0 input exceeds this maximum value, we want the VI to be able to warn us so. Use the LabVIEW “Case Structure” and “Formula Node”. Note that for LabVIEW 6.0 or higher, the power operation is written with ‘**’ and not with a ‘^’ as in Excel.

Submit your VI after running it for h0=0.5 (m) and v0=9.0 (m/s), and do Operate/Set Current Values as Default before saving. Don’t forget to name your file as cw8_yourlastname. Please also include your name AND date inside the Front Panel and Diagramas with a text box. Click here to submit the LabVIEW file.

*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.