Re: [ATM] Active damping

["Don Clement" <clement.focuser@verizon.net>]

> You could also run a loose piece of rope from one end to the other inside
each truss tube > to absorb the vibrational energy. Just like HAM RADIO
operators have been doing in
>  their big aluminum tubed beam antennas for generations now.

One of the major advantages of active dampening over passive dampening (like
the rope) is that is doesn't take several or even one complete cycle to
correct unwanted vibration. If the system is modeled correctly, or with
adaptive filters, only a portion of a cycle is needed for corrective action
to be applied. With active  dampening, the system is damped almost before
vibration can occur.

Don Clement
Running Springs, California

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