Towards Applied Heirarchical Control

Document #:

LIGO-G1200632-v3

Document type:

G - Presentations (eg Graphics)

Abstract:

For discussion on aLIGO T&C meeting

Files in Document:

• G1200632-v3.pdf (file is not accessible)

Other Files:

• G1200632-v3.pptx (file is not accessible)
• aLIGO_ISCControlScheme-v3.pdf (file is not accessible)

Topics:

• Seismic Isolation
• Preliminary Design
• Commissioning
• Suspensions
• Sensing and Control

Authors:

• Jeffrey Kissel

Notes and Changes:

V3 Fixes:
Slide 6 and corresponding control scheme attachment:
- Removed MCL path for clarity ("If you actually wanted to include how the force is distributed between the laser frequency, the reference cavity, and the mode cleaner length, you'd nee a whole new page" -- M. Evans & P. Fritschel)
- Corrected UGFs for CARM to 40 kHz (to the laser) and 100 Hz (to the mode cleaner)

V2 Fixes:
Slide 4:
- Added 'I' block for interferometric plant for clarity
- Added 'A' label around right-hand diagram showing detail of the heirarchy

In general clean up
- Fixed a few typos
- Added page numbers and DCC number to all slides
- Added related documents to file cards

Related Documents:

• LIGO-T1000242: Hierarchical Control Theory for Advanced LIGO
• LIGO-T1000298: Advanced LIGO Length Sensing and Control Final Design
• LIGO-T070247: AdvLIGO Interferometer Sensing and Control Conceptual Design
• LIGO-T0900511: Modeling of Alignment Sensing and Control for Advanced LIGO
• LIGO-G1200692: Hierarchical Control Notes – Blending Style

Referenced by:

• LIGO-G1200774-v15: Global longitudinal quad damping vs. local damping
• LIGO-G1200692-v3: Hierarchical Control Notes – Blending Style
• LIGO-G1400135-v1: Hierarchical Control of Toy Double Pendulum for Practice (HIFO-XY)