Peter Vince wrote:
Warren,
If you turn over an oscillator, is the frequency change
completely reversible (to your "under 1e-12 resolution") when it is
restored? Thinking aloud, if an hour-glass is turned over twice, the
final level will be the same, but the grains will be mixed. A quartz
crystal, however, is solid, so hopefully nothing actually moves.
Presumably the zero-G axis is with the axis of oscillation at 90
degrees to gravity?
Peter (the "other" one :-)
Well... depends on what effect you wants to cancel out. If you worry
about earth-quakes or other vibration, then is it more likely to be
shaken sideways or up-down? Is the gravity likely to change alot?
Letting the gravity has full effect on the crystal would allow for
minimum sensitivity to sideways movements.
A vector accelerometer and vector calibration such that a matrix of
correction parameters is crunched out could work to reduce sensitivity.
However, I would just prefer to make the environment stable.
Cheers,
Magnus
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