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Measured TFs when we excite in Y direction.
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Geophoneの共振ピーク付近でディップ（？）のようなものがみられる。

（まだ途中）

2018/07/19

Activities on 2018/07/18

  • Set a calibration factor of each LVDTs.
  • Measured TF in L, T and Y.
  • The results were saved at users/tanioka/TMS/TF/20180718.
  • The measurements were done by swept sine and the excitation amplitude was 3000.
  • I changed thresholds of WATCHDOG 800 for LVDT and 80000 for Geophone.

Activities on 2018/07/19

Measured TFs when we excite in Y direction. 20180718_TF_Yexc3000.png legend.png

Geophoneの伝達関数が高周波でフラットになっている。

本来は周波数の1次で落ちていくはず。

Geophoneの共振ピーク付近でディップ（？）のようなものがみられる。

（まだ途中）

KAGRA/subgroup/AOS/TMS-VIS0/2018-07-19 (last edited 2018-07-20 13:35:17 by SatoshiTanioka)