Vertical sensor correction

[YoshinoriFujii]

todo

[1] Add a path send to F0GAS for ETMs, F1GAS for ITMs. [2] check if it is necessary for ETMY suspension

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[3] confirm the awy to check the factor LVDT_calib/SEIS_calib

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[4] try to see what happen if just 1 is implemented

[YoshinoriFujii]

[4] try to see what happen if just 1 is implemented

at ETMX-BF-V

• see /users/VIS/TypeA/general/LogNotes/20190917/ETMX_vertical_check_gainpm1.png

• if we could apply to the most upper GAS, the RMS should be suppressed.

  • Does this affect to the TML spectra?
  • [ ] in simulation?
  • [ ] in the real life?

[YoshinoriFujii]

2019.9.27

• I'm now wondering, SC or FF for vertical motion would inject the noise larger than horizontal correction? Sometimes the attached situation looks happening:

[YoshinoriFujii]

2019.10.6

• Inter-calibration => around 0.7 looks sweet one? Not totally sure though.

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• Since seismometer-sensor correction would not work (as the open loop gain is relatively small), feed-forwarding would be better to suppress the amplitude at ~0.2Hz and ~0.6Hz,

• The residual:

  • see /users/VIS/TypeA/general/LogNotes/20190927/20190927_vertical_mon.png

• The CLTF:

  • see /users/VIS/TypeA/general/LogNotes/20191006/F0GAS_exc_w_controls_ALIGNED.png

[YoshinoriFujii]

というわけで FF prep

• displacement TF w/ controll: /users/VIS/TypeA/general/LogNotes/20190927/GAS_mon_w-control.xml

• force-TF w/ control: /users/VISsvn/TypeAtower/ETMX/Measurements/TF/Measurements/20191006/F0_GASexc_w_control.xml

[YoshinoriFujii]

fitting parameters (さしあたって):

• above 1Hz, そこそこ違うけど, 使わないし、とりあえず気にしないことにした 様子見

# ---------------------------------------------------- #
GND2F0AS w/ control

gain = [-0.2977 0.1797 0];

p0 = [0.2109 6. -1];
p1 = [0.5234 7 -1];
p2 = [1.45 2 -1];

z0 = [0 5 1];
z1 = [0.3438 10 1];
z2 = [0.7188 6 1];

fq = [gain; p0; p1; p2; z0; z1; z2];
# ---------------------------------------------------- #
F0GAS2F0AS w/ control sa-shi-a-ta-xtu-te

gain = [0.003541 0.07031 0];
p0 = [0.208 6. -1];
p1 = [0.5058 5 -1];
p2 = [1.086 2 -1];
p3 = [1.3 8 -1];
p4 = [1.789 3 -1];

z0 = [0.2344 6 1];
z1 = [0.5859 15 1];
z2 = [1.125 8 1];
z3 = [1.37 5 1];
z4 = [7 2 1];

fq = [gain; p0; p1; p2; p3; p4; z0; z1; z2; z3; z4];

# ---------------------------------------------------- #

[YoshinoriFujii]

上の情報をもとに Hd/H を計算したもの:

OUTPUT OFF の状態での spectra:

OUTPUT ON

の状態での spectra:

• Even though the residual of F0GAS was decreased properly, the residuals of the other were NOT changed much. Actually, the 0.4Hz peak became worse.
  • This looked because the F0GAS was not corrected, the F0-keystone was fixed ground.
  • [ ] try SC as well. Measure the displacement TF w/ SC.