me 392 chapter 5 spin balancing february 21 2012 week 7 part 2
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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

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approach to lab measurements
Approach to Lab Measurements

In the first lab basic approach I like to use for experiments

approach to lab measurements1
Approach to Lab Measurements

In 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 measurements2
Approach to Lab Measurements

In 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 measurements3
Approach to Lab Measurements

In 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 measurements4
Approach to Lab Measurements

In 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

“smith_lab1_filter.vi”

“smith_lab1_filter.m”

“smith_lab1_data.mat”

“sampling_frequency”

“accelerometer_data”

“iteration_number”

approach to lab measurements5
Approach to Lab Measurements

In 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 measurements6
Approach to Lab Measurements

In 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 week
This Week

Assignment 4 is due Friday, February 24

this week1
This Week

Assignment 4 is due Friday, February 24

Lab 2 is due next Friday, March 2

this week2
This Week

Assignment 4 is due Friday, February 24

Lab 2 is due next Friday, March 2

In both case you will record accelerometer signals

this week3
This Week

Assignment 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 4
Assignment 4

Your assignment 4 submission should have

MS Word file that explains what you did for each part of the assignment

One or more LabVIEW VIs that you used for the assignment

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 2
Lab 2

In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk

lab reports
Lab Reports

You 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 text

make your own figure

collect your own data

lab reports1
Lab Reports

You should follow the structure used for the first lab report for the next three lab reports

Make sure your figures are readable

lab reports2
Lab Reports

You should follow the structure used for the first lab report for the next three lab reports

Label axes with physical units like displacement (m) or time (s) rather than voltage (V)

Make sure your figures are readable

lab reports3
Lab Reports

You should follow the structure used for the first lab report for the next three lab reports

Label axes with physical units like displacement (m) or time (s) rather than voltage (V)

Make sure your figures are readable

lab reports4
Lab Reports

You should follow the structure used for the first lab report for the next three lab reports

No titles above the plots

Label axes with physical units like displacement (m) or time (s) rather than voltage

Make sure your figures are readable

lab reports5
Lab Reports

You should follow the structure used for the first lab report for the next three lab reports

No titles above the plots

Label axes with physical units like displacement (m) or time (s) rather than voltage

Make sure your figures are readable

Used numbers captions below the figure

Figure 1. The displacement response of the …

lab reports6
Lab Reports

You should follow the structure used for the first lab report for the next three lab reports

No titles above the plots

Label axes with physical units like displacement (m) or time (s) rather than voltage

Make sure your figures are readable

Used numbers captions below the figure

Figure 1. The displacement response of the …

lab 21
Lab 2

In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk

Step 1) measure the vibration induced your spinning disk

By 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 22
Lab 2

In 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 23
Lab 2

In 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 24
Lab 2

In 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

Where

ru is the radial distance to the correction mass

rtis the radial distance to the trial masses

lab 25
Lab 2

In 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 26
Lab 2

In 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?

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