me 392 chapter 5 spin balancing february 21, 2012 week 7 part 2
DESCRIPTION
ME 392 Chapter 5 Spin Balancing February 21, 2012 week 7 part 2. Joseph Vignola. Approach to Lab Measurements. In the first lab basic approach I like to use for experiments. Approach to Lab Measurements. In the first lab basic approach I like to use for experiments - PowerPoint PPT PresentationTRANSCRIPT
ME 392Chapter 5
Spin Balancing
February 21, 2012week 7 part 2
Joseph Vignola
Approach to Lab MeasurementsIn the first lab basic approach I like to use for experiments
Approach to Lab MeasurementsIn the first lab basic approach I like to use for experiments
All measurements parameters defined as LabVIEW controls and passed into a data file along with the data.
Approach to Lab MeasurementsIn the first lab basic approach I like to use for experiments
All measurements parameters defined as LabVIEW controls and passed into a data file along with the data.
Approach to Lab MeasurementsIn the first lab basic approach I like to use for experiments
All measurements parameters defined as LabVIEW controls and passed into a data file along with the data.
Approach to Lab MeasurementsIn the first lab basic approach I like to use for experiments
All measurements parameters defined as LabVIEW controls and passed into a data file along with the data.
Literal file and variable names
“sampling_frequency”“accelerometer_data”“iteration_number”
“smith_lab1_filter.vi”“smith_lab1_filter.m”“smith_lab1_data.mat”
Approach to Lab MeasurementsIn the first lab basic approach I like to use for experiments
All measurements parameters defined as LabVIEW controls and passed into a data file along with the data.
Literal file and variable names
Fully automated Matlab script for processing, plotting and saving results in final form
Approach to Lab MeasurementsIn the first lab basic approach I like to use for experiments
All measurements parameters defined as LabVIEW controls and passed into a data file along with the data.
Literal file and variable names
Fully automated Matlab script for processing, plotting and saving results in final form
Save unprocessed data in LabVIEW
This WeekAssignment 4 is due Friday, February 24
This WeekAssignment 4 is due Friday, February 24
Lab 2 is due next Friday, March 2
This WeekAssignment 4 is due Friday, February 24
Lab 2 is due next Friday, March 2
In both case you will record accelerometer signals
This WeekAssignment 4 is due Friday, February 24
Lab 2 is due next Friday, March 2
In both case you will record accelerometer signals
The accelerometers have a sensitivity of something like
Assignment 4Your assignment 4 submission should have
1) MS Word file that explains what you did for each part of the assignment
2) One or more LabVIEW VIs that you used for the assignment
3) Several different m-files, one for each part of the problem
You can work with only one other person, list their name in the MS Word file as your lab partner
Each of you should collect and process different data
Lab 2In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk
Lab ReportsYou should follow the structure used for the first lab report for the next three lab reports
You can’t use any text from lab report 1 unless you wrote it
You must: write all your own textmake your own figurecollect your own data
Lab ReportsYou should follow the structure used for the first lab report for the next three lab reports
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
Time (s)
Vol
tage
(V)
Vibration For Mass at Zero Degrees, Time
100
101
102
103
104
105
0
0.01
0.02
0.03
0.04
0.05
Frequency (Hz)
Am
plitu
de (d
B)
Vibration For Mass at Zero Degrees, Frequency
Make sure your figures are readable
Lab ReportsYou should follow the structure used for the first lab report for the next three lab reports
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
Time (s)
Vol
tage
(V)
Vibration For Mass at Zero Degrees, Time
100
101
102
103
104
105
0
0.01
0.02
0.03
0.04
0.05
Frequency (Hz)
Am
plitu
de (d
B)
Vibration For Mass at Zero Degrees, Frequency
Label axes with physical units like displacement (m) or time (s) rather than voltage (V) Make sure your
figures are readable
Lab ReportsYou should follow the structure used for the first lab report for the next three lab reports
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
Time (s)
Vol
tage
(V)
Vibration For Mass at Zero Degrees, Time
100
101
102
103
104
105
0
0.01
0.02
0.03
0.04
0.05
Frequency (Hz)
Am
plitu
de (d
B)
Vibration For Mass at Zero Degrees, Frequency
Label axes with physical units like displacement (m) or time (s) rather than voltage (V) Make sure your
figures are readable
Lab ReportsYou should follow the structure used for the first lab report for the next three lab reports
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
Time (s)
Vol
tage
(V)
Vibration For Mass at Zero Degrees, Time
100
101
102
103
104
105
0
0.01
0.02
0.03
0.04
0.05
Frequency (Hz)
Am
plitu
de (d
B)
Vibration For Mass at Zero Degrees, Frequency
Label axes with physical units like displacement (m) or time (s) rather than voltage Make sure your
figures are readable
No titles above the plots
Lab ReportsYou should follow the structure used for the first lab report for the next three lab reports
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
Time (s)
Vol
tage
(V)
Vibration For Mass at Zero Degrees, Time
100
101
102
103
104
105
0
0.01
0.02
0.03
0.04
0.05
Frequency (Hz)
Am
plitu
de (d
B)
Vibration For Mass at Zero Degrees, Frequency
Label axes with physical units like displacement (m) or time (s) rather than voltage Make sure your
figures are readable
No titles above the plots
Figure 1. The displacement response of the …
Used numbers captions below the figure
Lab ReportsYou should follow the structure used for the first lab report for the next three lab reports
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
Time (s)
Vol
tage
(V)
Vibration For Mass at Zero Degrees, Time
100
101
102
103
104
105
0
0.01
0.02
0.03
0.04
0.05
Frequency (Hz)
Am
plitu
de (d
B)
Vibration For Mass at Zero Degrees, Frequency
Label axes with physical units like displacement (m) or time (s) rather than voltage Make sure your
figures are readable
No titles above the plots
Figure 1. The displacement response of the …
Used numbers captions below the figure
Lab 2In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk
Step 1) measure the vibration induced your spinning diskBy measuring the acceleration for the motor frame
AC couple the data and integrate double integrate the data to get displacement.
Calculate the RMS displacement, Ro
Lab 2In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk
Step 2) make three more measurements with a trial mass at 0°, 120° and 240°
And calculate the RMS displacements, R1, R2 and R3
Lab 2In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk
Step 3) calculate the imbalance parameters using
Note the separation angle is
Lab 2In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk
Step 4) using T, the weight of your trial mass and the equation below, calculate a correction mass and angular location
Note used atan2.m Whereru is the radial distance to the correction massrt is the radial distance to the trial masses
Lab 2In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk
Step 5) Determine the RMS displacement (presumably reduced) with the correction mass.
Note: all five measurements should be made at the same motor speed.
Lab 2In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk
Step 5) Determine the RMS displacement (presumably reduced) with the correction mass.
Note: all five measurements should be made at the same motor speed.
Punch line statement for the conclusions
How much did the imbalance induced vibration change from step 1 to step 5?