1. SUSPENSION CONTROL: a joint Virgo/LSC workshop
Giovanni Losurdo – INFN Firenze

2. ADVANCED LIGO 12 dof active control MIMO/SISO sensor blending
“cradle effect”
pre-isolation
tilt subtraction …
hierarchical control
couplings
local damping
electrostatic actuators
steep roll-off …
Coll. meeting – Cascina, Feb 7th, G.Losurdo – INFN Firenze/Urbino /11

3. A WORKSHOP ON SEI/SUS CONTROL
Suspension control issues have been crucial for Virgo so far
They will be crucial for ADV LIGO as well
The field usually receives little attention by the community
Virgo/LIGO/GEO: different systems but many common problems
Let us try to gather the experts and start to exchange knowledge (and hopefully people)
1-day workshop within one the next LSC-Virgo meetings
(October Hannover?)
Coll. meeting – Cascina, Feb 7th, G.Losurdo – INFN Firenze/Urbino /11

4. LIST OF POSSIBLE TOPICS
Control strategy
Sensing noise and Error-Signal build-up (signal blending, sensor correction)
Ground tilt on controlled suspension systems (pure mechanics, tiltmeters)
Multi-Suspension system as whole (global control strategy for the suspension)
Smart filters (environmentally adaptive strategies, digital adaptability)
Coping with mechanical couplings (cross-talks specs and patches)
Hierarchical controls/locking force reallocation strategy
Feedforward
Hardware improvement
Electronics and actuators noise
Fused silica fibers susp: problems and solutions
Suspension point interferometer
Coll. meeting – Cascina, Feb 7th, G.Losurdo – INFN Firenze/Urbino /11