Hi,
As I follow the discussion I have to ask for =
clarification
of some points.
What is the magnitude of the nonlinearities in =
relation to other
instrument noise sources? The commercial instruments seem to be =
well
below the low noise model without taking this into account. =
We are not operating in silence looking for a single =
long
period signal to rise from nothing so would not normal noise dither the
instrument?
Next I can see 2 results for a feedback instrument. =
My
instinct would say that feedback should lower the stress gradients in =
the spring
and thus lower the occurrence of ‘pops’ proportionately. =
On
the other hand less motion of the mass would create greater opportunity =
for any
sticky behavior to manifest.
Final thoughts for now. Because a leaf spring =
has
length, would a defect near the fixed end create more effect than a =
defect near
the mass end by the fact a small angular change would be magnified by =
the
length? Does this make a case for shorter springs? Does the non =
metallic hinge
mount absorb some of the defect energy?
Randy