VIBRATION ISOLATION USING PERMANENT MAGNETS Guide: Mr. V.P.M Baskaralal Project Members: Swishy P John Syed Abdul Khader Syed Shahabuddin
VIBRATION ISOLATION USING PERMANENT MAGNETS
Guide: Mr. V.P.M Baskaralal
Project Members: Swishy P JohnSyed Abdul KhaderSyed Shahabuddin
ABSTRACT To absorb vibrations on the Top plate of
suspension system from Base excitation
Magnetic Levitation One DOF Two DOF
SUSPENSION SYSTEM - TYPESDepending upon the purpose, the suspension systems are classified as
Active suspension system Semi Active suspension system Passive suspension system
CAR MODELS (SUSPENSION) Full car model Half car model Quarter car model
MAGNETIC LEVITATION Magnetic levitation is a principle by
which an object is suspended with no support other than fields.
Magnetic materials and systems are able to attract or press each other apart or together with a force dependent on the magnetic field and the area of the magnets.
MAGNET USEDNEODYMIUM MAGNET Neodymium magnets are the powerful
magnets Grades range from N35 to N52
depending on their magnetic property. The magnetic flux of neodymium
magnet N35 is 3.3 tesla.
EXPERIMENTAL DETAILS
VIBRATION EXCITER Vibration Exciter is the machine used to
excite an object depending upon the Frequency inputted
PIEZO-ELECTRIC ACCELEROMETER Piezoelectric accelerometers convert
Acceleration into Electrical Signals and provide an electrical signal
Sensitivity of the accelerometer is the ratio of the sensor's electrical output to mechanical input
DEWESOFT SOFTWARE Operating Software Displacement
- Displacement vs Time Acceleration
- Acceleration vs Time
APPARATUS One DOF
- With Magnet- Without Magnet
Two DOF- With Magnet- Without Magnet
EXPERIMENTAL SETUP
- One Degree of Freedom- Two Degrees of Freedom
EXPERIMENTAL PROCEDURE
\ Setup diagram of Exciter with
the PC
OBSERVATIONS
DISPLACEMENT One DOF
- With Magnet- Without Magnet
Two DOF- With Magnet- Without Magnet
ACCELERATION One DOF
- With Magnet- Without Magnet
Two DOF- With Magnet- Without Magnet
MODAL ANALYSIS OF 1 DOF WITHOUT MAGNET
MODAL ANALYSIS OF 1 DOF WITH MAGNET
MODAL ANALYSIS OF 2 DOF WITHOUT MAGNET
MODAL ANALYSIS OF 2 DOF WITH MAGNET
CALCULATIONS
RESULT
DISPLACEMENT 1 DOF - without magnet
5 7 9 11 13 15 17 190
0.02
0.04
0.06
0.08
0.1
0.12
Bottom PlateTop Plate
5 7 9 11 13 15 17 19
Bottom Plate 0.0757 0.0288 0.0358 0.0325 0.0189 0.0345 0.1047 0.0387
Top Plate 0.037 0.0105 0.0097 0.0098 0.0134 0.0184 0.0198 0.0105
Frequency (Hz)
DISPLACEMENT 1 DOF - with magnet
5 7 9 11 13 15 17 190
0.01
0.02
0.03
0.04
0.05
0.06
Botttom PlateTop Plate
5 7 9 11 13 15 17 19
Botttom Plate 0.0538 0.0449 0.0369 0.0288 0.0289 0.0289 0.0196 0.0338
Top Plate 0.0088 0.0056 0.005 0.0057 0.0048 0.0047 0.0041 0.0066
Frequency (Hz)
DISPLACEMENT 2 DOF - without magnet
5 7 9 11 13 15 17 190
0.01
0.02
0.03
0.04
0.05
0.06
0.07
Bottom PlateTop Plate
5 7 9 11 13 15 17 19
Bottom Plate 0.0589 0.0454 0.0325 0.031 0.0248 0.0193 0.0311 0.033
Top Plate 0.0131 0.0095 0.0067 0.0065 0.0067 0.0068 0.0064 0.007
Frequency (Hz)
DISPLACEMENT 2 DOF - with magnet
5 7 9 11 13 15 17 190
0.02
0.04
0.06
0.08
0.1
0.12
Bottom PlateTop Plate
5 7 9 11 13 15 17 19
Bottom Plate 0.0372 0.109 0.0286 0.0412 0.0347 0.0306 0.0342 0.0356
Top Plate 0.0081 0.0041 0.0015 0.0024 0.0026 0.0028 0.0015 0.0014
Frequency (Hz)
ACCELERATION 1 DOF-WITHOUT MAGNET
5 7 9 11 13 15 17 190
2
4
6
8
10
12
14
16
Bottom PlateTop Plate
5 7 9 11 13 15 17 19
Bottom Plate 5.2993 4.4423 2.722 3.2805 1.7286 1.7994 13.784 1.3659
Top Plate 1.99 0.543 0.4169 1.2367 0.6433 0.8125 1.8882 0.5197
Frequency (Hz)
ACCELERATION 1 DOF-WITH MAGNET
5 7 9 11 13 15 17 19
Bottom Plate 3.0599 3.6276 2.9755 3.4351 2.5398 1.3418 3.0167 1.3336
Top Plate 0.4395 0.3119 0.2485 0.2425 0.2209 0.2556 0.2546 0.2802
5 7 9 11 13 15 17 190
0.5
1
1.5
2
2.5
3
3.5
4
Bottom PlateTop Plate
Frequency (Hz)
ACCELERATION 2 DOF-WITHOUT MAGNET
5 7 9 11 13 15 17 190
0.5
1
1.5
2
2.5
3
3.5
Bottom plateTop Plate
5 7 9 11 13 15 17 19
Bottom plate 2.0496 1.8134 2.9384 3.3318 1.3491 2.3186 1.5946 1.3523
Top Plate 0.5406 0.4179 0.2492 0.5016 0.4878 0.5926 0.5413 0.4172
Frequency (Hz)
ACCELERATION 2 DOF-WITH MAGNET
5 7 9 11 13 15 17 190
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Bottom PlateTop Plate
5 7 9 11 13 15 17 19
Bottom Plate 2.195 4.6478 1.7427 3.1173 2.9407 2.8708 1.3102 1.4027
Top Plate 0.263 0.3067 0.1933 0.2346 0.2096 0.2082 0.1464 0.1921
Frequency (Hz)
5 7 9 11 13 15 17 190
0.005
0.01
0.015
0.02
0.025
0.03
0.035
0.04
Without MagnetWith Magnet
COMPARISON: DISPLACEMENT 1 DOF with and without magnet
5 7 9 11 13 15 17 19Without Magnet 0.037 0.0288 0.0097 0.0098 0.0134 0.0184 0.0198 0.0105With Magnet 0.0088 0.0056 0.005 0.0057 0.0048 0.0047 0.0041 0.0066
Result- Displacement 1 DOF with and without magnet
Frequency (Hz)
COMPARISON: DISPLACEMENT 2 DOF WITH AND WITHOUT MAGNET
5 7 9 11 13 15 17 190
0.002
0.004
0.006
0.008
0.01
0.012
0.014
Without MagnetWith Magnet
5 7 9 11 13 15 17 19Without Magnet 0.0131 0.0095 0.0067 0.0065 0.0067 0.0068 0.0064 0.007With Magnet 0.0081 0.0041 0.0015 0.0024 0.0026 0.0028 0.0015 0.0014
Result - Displacement 2 DOF with and without magnetFrequency (Hz)
COMPARISON: ACCELERATION 1 DOF WITH AND WITHOUT MAGNET
5 7 9 11 13 15 17 190
0.5
1
1.5
2
2.5
Without MagnetWith Magnet
5 7 9 11 13 15 17 19Without Magnet 1.99 0.543 0.4169 1.2367 0.6433 0.8125 1.8882 0.5197With Magnet 0.4395 0.3119 0.2485 0.2425 0.2209 0.2556 0.2546 0.2802
Result – Acceleration 1 DOF with and without magnet
Frequency (Hz)
COMPARISON: ACCELERATION 2 DOF WITH AND WITHOUT MAGNET
5 7 9 11 13 15 17 190
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Without MagnetWith Magnet
5 7 9 11 13 15 17 19Without Magnet 0.5406 0.4179 0.2492 0.5016 0.4878 0.5926 0.5413 0.4172With Magnet 0.263 0.3067 0.1933 0.2346 0.2096 0.2082 0.1464 0.1921
Result – Acceleration 2 DOF with and without magnet
Frequency (Hz)
CONCLUSION
From the experiment it is observed that there is reduction in the displacement and acceleration values while performing experiment using magnets.
While comparing the values of experiment without magnet and the experiment with magnet, there is a difference in the values obtained.
Hence, Magnet acts as powerful shock absorber as it absorbs huge amount of shock and reduces vibrations getting transferred from bottom to the top plate.
ADVANTAGES Magnetic suspensions are cheap to construct. For commercial purpose this can be constructed at much
cheaper rates than conventional suspension systems used these days.
It is easy to construct as it does not involve any complex mechanism which could be very useful during repairs.
FURTHER DEVELOPMENTThis project can be further developed using different types of combinations such as using Multi Degrees of Freedom system, spring –Magnet- Damper combinations and using various powerful magnets which could absorb more vibration and act as powerful shock absorbing device to enable more comfort and safety to the passengers. Magnetic suspensions are still in developmental stage and can play important role in the future automobile suspension systems.