Week of April 24th 2019

[YoshinoriFujii]

Todo

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1. collect information

• [ ] what was the reason why the blending frequency of the L(,T) and Y was different.
• [ ] what is ongoing? for Type-A/B/Bp

• [ ] tasks for hierarchical control?

  2. summarize the Lucia's blending performance

  • [ ] check the frequencies of the notch in IP_TF, and the residual peak in BF_L(/T).

  • [ ] check the sensor noise level of the BF-LVDT

  • [ ] check the OLTFs for all the implemented loops

    3. build mechanical simulation models

  • [x] collect mechanical TFs

  • [x] for ETMX

  • [x] for ETMY

  • [x] for ITMX

  • [x] for ITMY

  • [ ] build mechanical models

  • [ ] for ETMX

  • [ ] for ETMY

  • [ ] for ITMX

  • [ ] for ITMY

    4. check the coherence (for ITMY)

  • [x] between IP and GND

  • [x] between BF-LVDTs and GND

  • [ ] try to make test filters for IPL/IPT

[YoshinoriFujii]

Todo

5. make a list of wanted results for the thesis.

Target: To characterize/evaluate the suspensions (for mainly Type-A)

• In terms of the vibration isolation performance

  • measure the TF from GND to DARM for each suspension.
  • w/ controls
  • (w/o controls)

• In terms of the damping loop performance

  • measure the decay-time constants
  • measure residual spectra.
  • dominant mode? for lock loss?

For the preparation of the above, what is remaining?

• hierarchical controls?

[YoshinoriFujii]

3. build mechanical simulation models collect mechanical TFs

The data is stored in: /users/VIS/TypeA/general/measurement_for_modeling

• [ ] make plots

[YoshinoriFujii]

4. check the coherence (for ITMY) between IP and GND between BF-LVDTs and GND

• The data is stored in: /users/VIS/TypeA/ITMY/measurement/IP_ACC/190425/ACC_monitor_190425.xml
• This was measured when the damping with IP-LVDT and BF-Y were closed.
• [ ] Try to subtract the seismic noise?

[YoshinoriFujii]

Note: dir of the sysid scripts: /kagra/Dropbox/Subsystems/VIS/Scripts/SuspensionControlModel/sysid/