= 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 [[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

=== 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
   *  Less than 880nrad [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=8343|JGW-T1808343]]
 * 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