texas a&m e3 summer research program class project jeffrey derry june 27, 2007
Post on 18-Dec-2015
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TRANSCRIPT
Topics…The questionGeneral TEA objectivesSpecific lesson objectivesThe experimentThe test rigGraphs of the dataConclusionsExtensionsAcknowledgements
THE QUESTION
Which of the given test materials provides the greatest damping on the
harmonic motion of a given base material?
General Objectives: To identify the characteristics of a
graph of a real world application To use graphical analysis to justify a
decision
Specific Objectives:To collect data using the TI-CBRTo import data into ExcelTo identify relative maximaTo identify the period and frequency of a
graph of harmonic motionTo use Excel to graph and interpret dataTo determine which of the test materials
has the greatest damping effect
Experiment:Each group of students will…1.Set up the test rig according to specification,
given the spec sheet and materials.2. For the base and 3 damping materials runs
A. Use the CBR to collect data (time, distance)B. Use TI-Connect to export the data to ExcelC. Make a stat plot for the dataD. Identify the relative maxima for the test runE.Determine the period and frequency for the test run
3. Present a data and graphical analysis of all graphs to determine which material has the greatest damping effect on the base material.
Group ResponsibilitiesPerform experiment
Collect data
Import data into Excel
Interpret data
Plan presentation
Group-1
Group-2
Groups 1&2
NOTE: It is suggested that groups 1 and 2 switch responsibilities after test run 2.
Response Comparison
0.62
0.63
0.64
0.65
0.66
0.67
0.68
0.69
0.7
0.71
0 0.5 1 1.5 2 2.5 3
time (sec)
base felt vinyl foam rubber foam
Dis
tanc
e (m
)
Time (sec)
Base Felt Vinyl Rubber
Response Comparison
ConclusionsUsing the data for each test run…The approximate period for each is 0.096768 secThe approximate frequency is 1/0.096768
or 10.33399 cycles/sec
The felt material exhibited the greatest damping effect on the base material.
ExtensionsDiscuss the theoretical approach to predicting harmonic motionUse the TI-83 to regress the maxima data
of set to identify damping factor, Discuss the use of damping materials in
real world applications