Differences between revisions 1 and 6 (spanning 5 versions)
⇤ ← Revision 1 as of 2019-03-26 16:55:38 →
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Editor: YoichiAso
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← Revision 6 as of 2019-04-03 15:12:36 → ⇥
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Editor: YoichiAso
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Deletions are marked like this. Additions are marked like this.
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 * Mechanical model : SUMCOM
 * Electronics model: Python ?
 * Control loop model: Python ?
 * Make the model Noise Budget compatible		  * Mechanical model : SUMCON
  * Integrated model exists
  * Tuning of the model parameters for individual suspension is necessary
 * Electronics model and control loop model can be implemented in the Noise Budget tool
 * Existing suspension [[https://granite.phys.s.u-tokyo.ac.jp/svn/KAGRA/trunk/kagranoisebudget/Suspensions/|NB model]]
 * Implement a standalone NB model for Type-A first
 * Then integrate it into the IFO NB model
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 * Tower part is on going (a fair bit done already)
 * CRY part will start from now
 * VIS experts should join the work to expedite it
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 * Except for ITMY, inertial damping is going to be completed
 * Integrated work with CRY and VIS is necessary
 * Modal damping for GAS (later ?)
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 * Procedure
  * Measure TFs from various stages to TM
  * Design blending filters to combine them
  * Iteration
  * Establishing a good suspension model is necessary in the filter design process
   * Inject seismic noise to make sure that no actuator saturate
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  * Currently fairly incomplete
  * We can get help from the Type-B team (Mark and Terrence)
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  * Length RMS < ?
  * Angular RMS < ?		   * Length RMS requirement
   * Since ALS will be used, there is no dynamical requirement for L
   * Saturation of the actuator while keeping the lock sets the requirement
  * Angular RMS requirement
   * Less than 880nrad [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=8343|JGW-T1808343]]
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  * Maximum actuation range
   * X um: f < 0.5Hz
   * YYY nm: 0.5Hz < f < 1Hz
   * ZZ nm: 1Hz< f < 10Hz
  * Response to the feedback input is similar to a single pendulum		   * We try to maximize the actuation range with proper combination of actuators
  * Response to the feedback input should be 1/f^2 around the UGF
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 * [[|Type-A commissioning schedule]]
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Main people to work on Type-A
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 * ???  * Yikang
 * Yamada
 * Mark
 * Fabian
 * Terrence

Integrated Type-A control meeting

To Do

Model

  • Mechanical model : SUMCON
    • Integrated model exists
    • Tuning of the model parameters for individual suspension is necessary
  • Electronics model and control loop model can be implemented in the Noise Budget tool

  • Existing suspension NB model

  • Implement a standalone NB model for Type-A first
  • Then integrate it into the IFO NB model

Sensor / actuator diagonalization

  • Tower part is on going (a fair bit done already)
  • CRY part will start from now
  • VIS experts should join the work to expedite it

TF measurements

  • Check the mechanical status of the suspension
  • Base for the control
  • Comparison against the model predictions

Damping control

  • Except for ITMY, inertial damping is going to be completed
  • Integrated work with CRY and VIS is necessary
  • Modal damping for GAS (later ?)

Hierarchical control

  • Procedure
    • Measure TFs from various stages to TM
    • Design blending filters to combine them
    • Iteration
    • Establishing a good suspension model is necessary in the filter design process
      • Inject seismic noise to make sure that no actuator saturate

Automatic operation

  • Guardian
    • Currently fairly incomplete
    • We can get help from the Type-B team (Mark and Terrence)
  • Automatic health check
  • Status monitor

Desired status before Y-arm lock

  • All the sensors diagonalized
  • All the actuators diagonalized
  • All the TFs reasonably agree with the model
  • Damping control satisfies the requirements
    • Length RMS requirement
      • Since ALS will be used, there is no dynamical requirement for L
      • Saturation of the actuator while keeping the lock sets the requirement
    • Angular RMS requirement
  • Hierarchical control is ready
    • We try to maximize the actuation range with proper combination of actuators
    • Response to the feedback input should be 1/f^2 around the UGF

Schedule

  • 4/1 - 4/26: ITMY suspension commissioning
  • 5/7-5/10: Y-arm lock with feedback to ITMY mass
  • [[|Type-A commissioning schedule]]

People

Main people to work on Type-A

  • Fujii
  • Lucia
  • Okutomi
  • Ushiba
  • Yikang
  • Yamada
  • Mark
  • Fabian
  • Terrence

KAGRA/Commissioning/Weekly/20190402/TypeA_Agenda (last edited 2019-04-03 15:12:36 by YoichiAso)