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Servomechanism lift device resonances

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andrea.todeschini

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Hi,
I'm an italian student and in my thesis I'm analyzing the dynamic behavior of a lift device. I have done the frequency analysis and I have discovered three resonances. As I have seen, they are caused by the arm vibrations and by the ripples. I have identified the natural frequency and the damping, but I'm looking for a phisical construct (formula) to well describe this phenomena. Can someone help me?
Thanks

Andrea Todeschini
 

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