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本篇主題：how to estimate the damping ratio and the moment of inertia
比如DVD的spindle??，?????一般?多少？有?有一???值可以?付大多???。如果?有，如何根据一些?有的?器??推?？ thanks!

本話題由 石磊 於2004-11-28 00:00:00 發表 
目前共有2人回覆，最後回覆時間： 2004-12-21 13:53:00

 how to estimate the damping ratio and the moment of inertia 　 石磊　 2004-11-29 15:37:56
The Moment of Inertia for a flat disc with a hole in the center is: I = M/2 · (square(R1) + square(R2)) Where I = Moment of Inertia M = Mass (weight) of the disc R1 = Radius of inner hole R2 = Radius of the disc

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 how to estimate the damping ratio and the moment of inertia 　 石磊　 2004-11-29 15:53:34
The moment of inertia is dependent on the external object, but how to estimate damping ratio of a dc motor is still not clear.

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