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=== Kick-off meeting === == Kick-off meeting ==
2020/5/27 10:30 - 12:00
Zoom: KAGRA [[https://zoom.us/j/6676627462|Zoom2]]

=== Goal of the meeting ===
Decide the followings

=== Deliverables of the work ===
A document to answer the following questions
 1. Does the expected actuator noise level satisfy the KAGRA requirement ?
 2. Can we lock the interferometer with the modified actuators ?
  2. Is lock acquisition possible ? (ignore noise)
  2. Can we keep the lock with weak damping ? i.e., not injecting excess control noise from strong damping
 3. Can we damp all the resonant modes of the CRY payload within reasonable time (like 1 minutes) ?

=== Methods ===
 * Create a SUMCON model of modified CRY payload
 * Implement local damping loops on simulation
  * Check the damping efficiency of resonant modes
 * Implement a hierarchical control scheme on simulation
  * Check the controllability of the suspension
  * How can you evaluate the feasibility of lock acquisition ?

=== Assignment ===
 * Create a SUMCON model: Shoda, Ushiba, Miyo
 * Damping and hierarchical control: Ushiba, Yamada, Nakano, Shoda, Miyo, Terrence
 * Set requirements from IFO: Nakano, Michimura

=== Deadline ===
 * Mid-June: intermediate report on the progress at a meeting
 * End-of-June: final report (too aggressive ?)

CRY payload actuator upgrade in 2020

Contents

  1. CRY payload actuator upgrade in 2020
    1. Kick-off meeting
      1. Goal of the meeting
      2. Deliverables of the work
      3. Methods
      4. Assignment
      5. Deadline

Kick-off meeting

2020/5/27 10:30 - 12:00 Zoom: KAGRA Zoom2

Goal of the meeting

Decide the followings

Deliverables of the work

A document to answer the following questions

  1. Does the expected actuator noise level satisfy the KAGRA requirement ?
  2. Can we lock the interferometer with the modified actuators ?
    1. Is lock acquisition possible ? (ignore noise)
    2. Can we keep the lock with weak damping ? i.e., not injecting excess control noise from strong damping
  3. Can we damp all the resonant modes of the CRY payload within reasonable time (like 1 minutes) ?

Methods

  • Create a SUMCON model of modified CRY payload
  • Implement local damping loops on simulation
    • Check the damping efficiency of resonant modes
  • Implement a hierarchical control scheme on simulation
    • Check the controllability of the suspension
    • How can you evaluate the feasibility of lock acquisition ?

Assignment

  • Create a SUMCON model: Shoda, Ushiba, Miyo
  • Damping and hierarchical control: Ushiba, Yamada, Nakano, Shoda, Miyo, Terrence
  • Set requirements from IFO: Nakano, Michimura

Deadline

  • Mid-June: intermediate report on the progress at a meeting
  • End-of-June: final report (too aggressive ?)

KAGRA/Upgrades/PostO3Upgrades/CRYActuators (last edited 2020-08-04 09:41:42 by YoichiAso)