Helicopter Vibration Jack

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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 :


vibration?
http://www.youtube.com/watch?v=W4s2UwKm7dchttp://www.youtube.com/watch?v=W4s2UwKm7dc


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Random Vibration :


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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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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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.

Helicopter Vibration Jack

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