helicopter vibration jack
Post on 06-Apr-2018
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Helicopter Seat Vibration Reduce
Jack
1. What is vibration and what is helicopter vibration?
2. Why it needs to reduce the vibration?
3. How to reduce the vibration?
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Vibration: Amplitude and Frequency
sound
music
heart
1. What is vibration, and what is helicopter
vibration?
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http://www.youtube.com/watch?v=W4s2UwKm7dc
Periodic Vibration :
1. What is vibration, and what is helicopter
vibration?
http://www.youtube.com/watch?v=W4s2UwKm7dchttp://www.youtube.com/watch?v=W4s2UwKm7dc -
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Random Vibration :
1. What is vibration, and what is helicopter
vibration?
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2. Why it needs to reduce the vibration?
a. Physical discomfort
b. Neck and spine strain injuries
c. Causes fatigue
d. Leads to inattention and distraction
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To be a helicopter pilot
is not easy.
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Active control methods
1 Primary vibration
Physical concept of active vibration cancellation
3 Residual vibration
2 Secondary vibration(anti-vibration)
The principle of Superposition
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Active control methods
1. Dynamic Model
http://www.mfg.mtu.edu/cyberman/machtool/machtool/vibration/intro.htmlhttp://www.mfg.mtu.edu/cyberman/machtool/machtool/vibration/intro.htmlhttp://www.mfg.mtu.edu/cyberman/machtool/machtool/vibration/intro.html -
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Active control methods2. Simulation Model in Matlab Simulink
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Active control methods3. Simulation Results Analysis
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Active control methods
4. Mannequin Test Seat Experiment
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Reference
1.http://www.pptbackgrounds.net/human-back-and-spine-backgrounds.html
2.http://www.mfg.mtu.edu/cyberman/machtool/machtool/vibration/intro.html
3.http://www.stirling-dynamics.com/our-products-1/g-seats
4.Yong, C., V. Wickramasinghe, and D.G. Zimcik, Development of Adaptive
Helicopter Seat for Aircrew Vibration Reduction. Journal of Intelligent MaterialSystems and Structures, 2011. 22(5): p. 489-502.
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