Engineering 103
Home Work 3
Name_________________________
Due date__________________________
Your answers and
figures should be contained in a zipped Word file to be submitted electronically
via the link below. If Word is not available, please keep your texts in a text
file, figures in jpeg files (within Paint, use ‘Save As jpeg format’), then
assemble everything into a Word file in class, and put it into a ZIP folder for
compression, and submit. HW3 file or folder should be named: hw3_lastname. File
size around 60K or smaller will work best. If this can’t be achieved, then
you’ll need to send it to me by email or submit it on a disk.
From Horenstein,
chapter 3.
Problem solving and idea generation. These designs should pass the “conceptual test”, i.e., after seeing the drawings, the reader can agree prototypes based on these designs will possibly work. A good design should be able to solve at least one anticipated problem.
1.- Develop
a method to save energy by reducing or eliminating traffic jams, be specific
and include all details. A diagram is required.
2.- Design
a system to be used by a quadriplegic to turn the pages of a book. Defend your
design by including one anticipated problem and explain what and how one or
more elements in your design will help overcome it. Details sketches are
required.
Logbook and Record Keeping:
consult the Horenstein book for examples of a detailed sketch and tolerance
table.
3.- Measure
the dimensions of an ordinary computer keyboards with its main groups of keys.
Prepare a dimensioned sketch, complete with tolerance table.
Estimation:
you can only research for ‘obvious data’ such as the air density, and the
number of students in each sections of the freshman English class at UMB. Then
show calculations leading to your estimates. These calculations are worth at
least 75% of credits.
4.- Estimate
the total mass of air that passes through your lungs each day
5.- Estimate
the number of books checked out of Healey Library each week
Data Analysis
6.- Provide
a method to obtain a ranking for the school districts in
7.- Provide
that ranking list for the “top ten” school districts using Excel, defend your
results.
LABVIEW: Consult your LabView manual when
necessary.
8.- Create
a VI that solve the circuit shown. Inputs: V (
All needed formulas: I=V/(R1+R2) ; V2=I*R2 (or V2=V-I*R1). Set V=9V; R1=2
Ohm; R2= 2 Ohm. Run VI. No credit will be awarded without numerical
results shown in Front Panel. Include your name and date in a text box in
the Front Panel and Block Diagram, and paste a copy of both into your Word file
(large pictures will increase file size, so use a moderate size).
Figure for problem 8 Figure
for problem 9
9.- Create
a VI that solve the circuit shown. Inputs: V (
All needed formulas: I=V/(R1*R2/(R1+R2))
; I2=V/R2. Set V=9V; R1=2 Ohm; R2= 2
Ohm. Run VI. No credit will be awarded without numerical results shown
in Front Panel. Include your name and date in a text box in the Front Panel
and Block Diagram, and paste a copy of both into your Word file (large pictures
will increase file size, so use a moderate size).
EXCEL
10.- Import
the data (metal distance and ultrasonic response) from http://www.itl.nist.gov/div898/handbook/pmd/section6/pmd631.htm
into Excel (it helps to save them into a text file and then use ‘Data/Get
External Data/Import text file’ with the ‘fixed width’ option). Produce a
non-linear fit with a model different than the exp(-b1*x)/(b2+b3*x)
used in CW5 to achieve a smaller ‘standard’ deviation. Plot the data and best
fit on a same plot. Then copy the plot into a Word file. State clearly your
model and provide Excel values for all the coefficients and also the final
‘standard’ deviation.
Model:___________________
First coefficient:___________ Second coeff.:____________ Third coeff.:______________ Fourth coeff:________________ Fifth coeff (if applicable):_____________
Final standard deviation: __________________
Also provide data obtained from CW5 here:
Model: exp(-b1*x)/(b2+b3*x)
b1=_______________ b2=________________ b3=___________________
Final standard deviation:__________________
Click here to send your zipped file. Remember it should be named ‘hw3_yourlastname’.