MEE 490 Fall ’98 Homework Assignments:

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HW#1a HW#1b HW#2HW#3 HW#4 HW#5 HW#6 HW#7 HW#8 
HW#9 HW#10 HW#11 HW#12 HW#13 HW#14 HW#15 HW#16 

Homework No. 1a: Tuesday, August 25, 1998 (Due Tu, 9/1/87)

  1. Print our class Syllabus, posted on my Web site, http://www.ceet.niu.edu/faculty/kostic, sign and bring it for our next class meeting (next Tu, 9/1/98). Read the syllabus carefully and clarify with me all your concerns and doubts during our next class meeting.
  2. Send me an email (kostic@ceet.niu.edu) with the subject line exactly (but without quotes): "MEE 490 Fall 1997 Student E-mail Contact". I need this email immediately to get your email address and make up email group list for our class, so that I could send you future class information via email.

Textbook:

  1. R.S. Figliola, and D.E. Beasley, Theory and Design for Mechanical Measurements - 2nd Edition, Wiley, 1995,
  2. L.K. Wells and J. Travis, LabVIEW FOR EVERYONE, Prentice Hall PTR, 1997

References (newer editions may exist for some):

A.J. Wheeler and A.R. Ganji, Introduction to Engineering Experimenntation, Prentice Hall, 1996
E.O. Doebelin, Measurement Systems - Application and Design, 4th Edition, McGraw-Hill, 1990
J.P. Holman, Experimental Methods for Engineers, 5th Edition, McGraw­Hill, 1984.
J. W. Dally, W. F. Riley, and K. G. McConnell, Instrumentation for Engineering Measurements, John Wiley & Sons, 1984.

Additional references will be given during the lectures along with handouts.

Homework No. 1b: Tuesday, August 25, 1998 (Due Th, 9/3/98 if not specified otherwise):

Study thoroughly the Handout from "Design and Analysis of Experiments," by D.C. Montgomery  and prepare yourself for brain-storm discussion and answering question for next class meeting, as well as for a short quiz related to the Handout. Write a one-page review of the Handout and submit it as a typed document by the due date.

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Homework No. 2a: Assigned in week of Tu, 9/1/98 (Due Th, 9/10/98 if not specified otherwise):

  1. Write a one-page proposal on a first choice of your individual project using our lab equipment from the partial list in the syllabus, and/or your original idea (some suggestions will be given in class) using or building apparatus at your work or home. You are expected to use PC Data Acquisition and LabVIEW for your actual data acquisition and analysis. Explain and justify your choice. List other choices in order of your preference from the project list (Due on the second class meeting next week).
  2. Make your 1st individual appointment to review your project proposal and get it approved.
  3. Do the following problems from the Textbook (3.11; 5.41; 8.27; 9.7; 11.13) and be ready to explain /present/justify your work by the due date (the second class meeting next week).

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Homework No. 2b: Assigned in week of Tu, 9/1/98 (Due Th, 9/10/98 if not specified otherwise):

Problem

For the given data set (t,y1) in file DATA_xy.PRN, determine the best curve fit using the least-square method and the following equation:

y1=S+C*cos(w*t-f) for data (t,y1)

  1. In order to solve for coefficients S, C, w, and f using the least-square method, you'll need to solve a system of non-linear equations. You may use commercial software like MATLAB or MATHCAD (built-in "Given" and "Find" function) or similar, or do it your own way.
  2. Redo the same problem using the Minerr function in the Given solve block using the MathCAD.
  3. Redo the same problem using the "genfit"

NOTE: To help you do this problem an Example is provided for you.

Writing Assignment:

Type a one-page Summary of the most important information, according to your judgement, from the Handout of HW No.1b.

 NOTE: Most of you have made appointments with me to review your Individual Project Proposals and approve them. You may bring an updated proposal for your appointment if you wish. If you did not make your appointment, you have to do it immediately, since you have to have your Proposal approved by 3 PM on Tu, 9/9/97.

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Homework No. 3: Assigned in week of Tu, 9/8/98 (Due Th, 9/17/98-extended till 9/22/98 if not specified otherwise):

Problem

For the given data set (t, y2) in file DATA_xy.PRN, determine the best curve fit using the least-square method (MathCAD) and the following equations:

(a) y2=S2+C2*cos(w2*t-f2) for data (t,y2)

In order to solve for coefficients S2, C2, w2, and f2, etc., you'll need to use techniques as in previous HW (HW#2). Furthermore do the following:

(b) Determine the period of the cycle T.

(c) Extend the data to make up five cycles by "copying" one cycle along the abscissa five times and plot such an extended "signal" (Hint: yi+nT = yi)

(d) Perform the discretized Fourier Transform on the "extended signal" data from (c) and plot the amplitude of magnitudes and phases as function of frequency.

(e) Filter the signal by "rejecting" (making zeros) all amplitudes which are smaller than 1/10th of the magnitude of maximum amplitude. Perform the Inverse Fourier transform on such filtered signal and plot it together with the curve-fitted equation from (a).

NOTE: Study and learn Section 2.5 (p.62-70) and Sec.7.2 (p.269-278). To help you do this problem two examples are provided: Example 1 and Example 2.

Additional Homework: Individual project "Weekly Progress Report" is due every Tuesday as a regular homework and will be graded. Your weekly progress report has to be typed and should clearly state your activities and accomplishment within the last week only. For example, you may state in your report that you were doing literature search and reading relevant references, but you have to give specifics about your accomplishments, like full bibliographic citation of found references, pages or chapter(s) read, etc. You may state that you have discussed your project with a professional (from industry or academia) or visited a supply or hardware store, but you have to be specific about what you have accomplished, i.e. what you've found in the stores, for example. The progress report will help you later in writing the final report on your project.

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Homework No. 4: Assigned in week of Tu, 9/15/98 (Due Tu, 9/22/98 if not specified otherwise):

Today, 9/15/98, we did not cover any new material, but discused the HW and review of the project fundamentals. As you know, I am using new technology (Internet, computerized presentations, etc.) and on occasion we experience some technical difficulties. I do provide characteristic examples on Web (for you to copy and study them), like:

for Curve-fitting (Least-square method etc.)

for signal "filtering" with Fourier transform Also another example

Also, a new handout is posted regarding your project:
for Heat-transfer and Flow-loop Apparatus in Still Gym.

Your assignment is also to review the first five chapters in the Textbook with emphasis on Ch.5, "Uncertainty analysis," and to work on the project: review a chapter on internal flow in channels/pipes from a Fluid Mechanics book and study the Holz's MS Thesis. Written progress report on your project is due every week and will be graded.

In order to help you with HW#3, in addition to the above posted handouts (MathCAD files), I did today what I normally do not do. I did a "favor" to you by showing the solved HW, so that you get a "glance" on some (MathCAD) details and to get confidence by seeing it done and by seeing the graph of the results. However, since it is a HW to be graded, I did not want you to have a copy of it nor to take the notes, but to work it out on your own later.

The HW#3 requires that you "smooth" given scattered data by using curve-fitting and filtering scatter or "noise" using the FFT method. As I already mentioned, the data analysis methods (curve-fitting and FFT) are important, and you may use any tool for it, like MathCAD, MATLAB, Excel, FORTRAN, C, BASIC, etc. I am using MathCAD since I believe it is the most convenient and available at CEET.

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Homework No. 5: Assigned in week of Tu, 9/22/98 (Due Tu, 9/29/98 if not specified otherwise):

1) Individual project "Weekly Progress Report" is due every Tuesday as a regular homework and will be graded. Your weekly progress report has to be typed and should clearly state your activities and accomplishment within the last week only. It is very important that your work on your project regularly and make some progress every week. It is also very important that you try all your project activities as soon as possible (immediately) in order to experience "surprising" obstacles early; in particular, try to set up your apparatus (even if incomplete) and perform initial measurements immediately. The progress report will help you later in writing the final report on your project.

2) Review all materials covered in lectures and through the homework assignments up to and including this week and prepare for our First Midterm Exam for next Thursday, 10/1/98. MathCAD files are provided for you to conveniently calculate Gaussian and Student-t distributions, and Polynomial and Arbitrary cure fit using Least-Square-Method (LSM). Problem 5.30 is done for you as an example for uncertainty analysis.

 3) Read and study first tree chapters (up to page 72) from your text "LabVIEW FOR EVERYONE."

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Homework No. 6: Assigned in week of Tu, 9/29/98 (Due Tu, 10/6/98 if not specified otherwise):

1) Individual project "Weekly Progress Report" is due every Tuesday as a regular homework and will be graded.

2) Read and study Chapters 4 & 5 (up to page 144) from your text "LabVIEW FOR EVERYONE." Redo all Activities/Examples from the two chapters using LabVIEW software (available on a number of PCs in Computer Room (back AutoCAD room, 1st floor, also included on the CD with your LabVIEW text) and e-mail them as attachment files before the due date.

NOTE: In two weeks your "First Draft of the Project Report" is due. It should be written in appropriate format and include all work accomplished so far.

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Homework No. 7: Assigned in week of Tu, 10/6/98 (Due Tu, 10/13/98 if not specified otherwise):

The "First Draft of the Project Report" is due on Tu, 10/13/98. It should be written in appropriate format and include all work accomplished so far. You'll have to prepare and present your Report in class using transparences or PPT presentation or similar. All drafts and final reports will be submitted and presented as the team work (one copy for me). However, only the very final team report will be copied by every team member and submitted and defended individually. The Project grade will be individual and will depend on the team accomplishment, individual involvement in the project, and final presentation and individual defense of your project.

Optional Midterm Makeup: If you want, you may redo our Midterm and submit it to me at 8 AM on Tuesday, 10/13/98. Since this is optional, no extension will be given for any reason. You have to pay attention on units and calculation, since very little partial credit will be given if results are not correct (this time no time limit and you may use PC/MathCAD). I will not discuss the solutions of the Midterm until you submit the makeup exam on Tuesday. Only the following hints are provided to you:

Problem 1: You have to use the Student-t distribution and be careful not to mix-up similar but different terms.

Problem 2: There is NO final formula in the Text that you may use, you have to derive it. Plot given data and your fitted curve in scale.

Problem 3: Use the "folding" diagram and think about part (c).

Problem 4: Compare your function with Eq. 2.20, p. 56 in the Text. The coefficients could be find directly by inspection, no need to use formulas given by Eqs. 2.25 on p. 63.

Please submit both, your graded in-class Midterm with take-home makeup Midterm. Your grade will be averaged with in-class Midterm exam.

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Homework No. 8: Assigned in week of Tu, 10/13/98 (Due Tu, 10/20/98 if not specified otherwise):

1) Read and study Chapters 6 & 7 (up to page 214) from your text "LabVIEW FOR EVERYONE." Redo all Activities/Examples from the two chapters using LabVIEW software (available on a number of PCs in Computer Room (back AutoCAD room, 1st floor, also included on the CD with your LabVIEW text) and e-mail to me only even-numbered Activities/Examples as attachment files before the due date.

2) Study our LabVIEW and Data Acquisition handout. Play with LabVIEW and DAQ hardware (DAQ board and Demo box), and with the numerous Examples included with your LabVIEW Student Edition and with LabVIEW Professional Version (which comes with extensive on-line help). You should review these examples and you may copy those parts suitable for your application. Some suggestions:

Use LabVIEW application file in 490LVDAQ.LLB, specially developed to be used in our Computer Lab with DEMO-BOX and Lab-PC+ DAQ board. It will transfer your computer into a color, multifunction, multi-channel oscilloscope. Copy it for your use, or Open (load) it from the LabVIEW File menu and Run its 490LVDAQ.vi. Practice (play), learn and have fun!

Individual project "Weekly Progress Report" is due every Tuesday (except when the project draft report is due) as a regular homework and will be graded.

NOTE: In two weeks your "Second Draft of the Project Report" is due. It should be written in appropriate format and include all work accomplished so far.

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Homework No. 9: Assigned in week of Tu, 10/20/98 (Due Tu, 10/27/98 if not specified otherwise):

  1. Your "Second Draft of the Project Report" is due on Tuesday, 10/27/98. It should be written in appropriate format and include all work accomplished so far.
  2. Read and study Chapters 8 & 9 (up to page 273) from your text "LabVIEW FOR EVERYONE." Redo all Activities/Examples from the two chapters using LabVIEW software (available on a number of PCs in Computer Room (back AutoCAD room, 1st floor, also included on the CD with your LabVIEW text) and e-mail to me only even-numbered Activities/Examples as attachment files before the due date on Thursday, 10/29/98).

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Homework No. 10: Assigned in week of Tu, 10/27/98 (Due Tu, 11/3/98 if not specified otherwise):

  1. Data Acquisition-DAQ and Signal Conditioning:
    Study the handout, LabVIEW and Data Acquisition (DAQ), also Secs.7.6-9 Data Acquisition Systems, Text p.295-313, and be ready to discuss it with me and our Lab Teaching Assistant. In our MEE Labs (2nd floor) we are using Plug-and-Play (PnP) multifunction AT-MIO-16DE-10 boards     [also], which are configured more conveniently by software. We have couple of DAQ set-ups with SCXI signal conditioning to measure vibration of beam (pinned on a potentiometer as an inexpensive sensor), see LabVIEW program and its Virtual instrument Front panel, and also two units on wheeled carts as "mobile" computerized DAQ systems.
  2. Measure the above two vibration beams' "ringing" and natural frequencies, and the damping ratio (our Text, Eqs. 3.13, 3.15a and 3.17, p.99-100). Submit a typed report on your measurements and calculated results with appropriate comments and conclusion. Review and fully understand the corresponding LabVIEW VI file/program and modify it by adding something creative and useful as discussed during the lecture. Email the modified file to me before the HW due date.

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Homework No. 11: Assigned in week of Tu, 11/3/98 (Due Tu, 11/10/98 if not specified otherwise):

  1. Your "Third Draft of the Project Report" is due on Tuesday, 11/10/98. It should be written in appropriate format and include all work accomplished so far.
  2. Your assignment of last week, Measurement of vibration of a beam (pinned on a potentiometer as an inexpensive sensor), see LabVIEW program and its Virtual instrument Front panel, is postponed for one week and is due on 11/10/98.

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Homework No. 12: Assigned in week of Tu, 11/10/98 (Due Tu, 11/17/98 if not specified otherwise):

  1. Measurement of vibration of a beam using Data Acquisition lab reports were not done according to the assignment of 10/27/98: "...Submit a typed report on your measurements and calculated results with appropriate comments and conclusion." This is the final extension. Please redo the lab and report according to the instructions given in class. It is important to give fundamental formula, include the raw measured data and the results.
  2. Work on finalizing your Individual Project and final report which is due on 11/24/98. Your report must be written professionally as per given instructions, with "complete and unique" nomenclature, over-all schematics of the apparatus' set-up with instrumentation, and uncertainty analysis, among other requirements. Full report of your Individual project (should include everything--measured and analyzed results with conclusion and recommendation).

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Homework No. 13: Assigned in week of Tu, 11/17/98 (Due Tu, 11/24/98 if not specified otherwise):

  1. A final report copy of your individual project is due on our next class lecture (Tuesday, 11/24/98). That final copy will be graded and filed. Since it will not be returned to you, you have to have extra copies for you. Your report must be written professionally as per given instructions, with "complete and unique" nomenclature, over-all schematics of the apparatus' set-up with instrumentation, and uncertainty analysis, among other requirements. THIS IS THE LAST CHANCE FOR CORRECTIONS AND IMPROVEMENTS.
  2. You should be ready to give a presentation of your project to the class with instructions for other students to perform experiments/measurements related to your project as per given Instructions after you submit the final report.

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Homework No. 14: Assigned in week of Tu, 11/24/98 (Due Tu, 12/1/98 if not specified otherwise):

You have to make you final (exit) appointment with me during the last week of lectures. For that appointment you should bring the following with you (as per given Instructions):

We will have the final exam as per the official schedule (unless it is waived). The final exam is comprehensive and will, in addition, test your knowledge and understanding of all lab projects (experiments) within your section.

Before the end of the semester you are required to clean and put in original order all equipment and accessories you have used in the lab and return all lab manuals and other literature to original place or to me (or our lab TA). If something is broken or not in working conditions you need to report it in writing in order for it to be repaired/replaced for the next semester. You need to get signed clearance from me (or our TA) about these. 

If you have readily available electronic form of your project report, please email it to me as an attachment (any number of files if OK) or bring it for your final appointment with me.

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