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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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

ME 392Chapter 5Spin BalancingFebruary 21, 2012week 7 part 2

Joseph Vignola


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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