Add paragraph on sensor noise
This commit is contained in:
parent
c3bd204622
commit
c435514621
11
index.org
11
index.org
@ -2140,12 +2140,13 @@ With a vertical nano-hexapod stiffness $\approx 10^6\,[N/m]$, the maximum static
|
|||||||
This will change a little bit the architecture of the nano-hexapod but this should be too small to change significantly the dynamics.
|
This will change a little bit the architecture of the nano-hexapod but this should be too small to change significantly the dynamics.
|
||||||
|
|
||||||
** Sensor Noise introduced by the Metrology
|
** Sensor Noise introduced by the Metrology
|
||||||
Say that is will introduce noise inside the bandwidth (100Hz)
|
During all this study, the measurement of the relative position of the sample with respect to the granite was considered to be perfect, that is to say *noiseless* and with *infinite bandwidth*.
|
||||||
This should not be significant.
|
|
||||||
|
|
||||||
The metrology is considered to be perfect now.
|
This was done for the following reasons:
|
||||||
It can be considered separately (explain why).
|
- interferometers have such a large bandwidth (> MHz) compared to the control bandwidth ($\approx 100\,[Hz]$) that their dynamics can indeed be considered to be represented by "unit transfer functions"
|
||||||
It just need to have a sufficient bandwidth which is the case for the attocube (in the bandwidth of interest, it can be considered as a unit transfer function).
|
- sensor noise can generally be considered separately.
|
||||||
|
As a matter of fact, the sensor noise is completely transmitted to the sample's motion within the control bandwidth and is filtered outside the control bandwidth.
|
||||||
|
It is then quite simple to predict what will be the effect of the sensor noise on the sample's motion.
|
||||||
|
|
||||||
** Using soft mounts for the Granite
|
** Using soft mounts for the Granite
|
||||||
<<sec:soft_granite>>
|
<<sec:soft_granite>>
|
||||||
|
Loading…
Reference in New Issue
Block a user