AdL SUS/US Quad Controls Conceptual Design J. Heefner 7/12/2005 - - PowerPoint PPT Presentation

LIGO-G050318-00-C

AdL SUS/US Quad Controls Conceptual Design

• J. Heefner

7/12/2005

AdLIGO 2

LIGO-G050318-00-C

AdL SUS Controls Conceptual Design

Design Considerations » AdL Controls Architecture has yet to be determined

– Controls block diagram based on scaling of existing LIGO controls and architecture along with present DSpace controls

» AdL Controls ADCs, DACs, BIO, etc. have yet to be determined

– Requirements for ADC input noise based on recent testing of the Analog Devices AD7679 – Requirements for DAC output noise based on experience with the VME-based Frequency Devices DAC module – Requirements for Binary I/O based on experience with VME, PCI and PC104 based binary I/O modules

This design primarily focuses on interface between

US and UK and the feasibility of implementing the required design using LIGO-like controls.

AdLIGO 3

LIGO-G050318-00-C

AdL Quad Controls Requirements

The requirements for the system can be found in the Universal

DRD, T000053-03.

Highlights of electronics requirements:

» ADC-

– Input Voltage: +/-10 volts, differential – Input Impedance: >1Kohm – Input-referred noise: <200nV/√Hz for freq>100Hz, 200nV/√Hz @10Hz[1] – Sample Rate: 16384 samples/second, nominal – CMRR: >68dB at 100KHz [1] The numbers for the input referred noise voltage of the ADC are based on tests recently conducted on the Analog Devices AD7679 ADC. In these tests, it was found that the input referred noise voltage of the ADC is less than 100nV/√Hz for freq>10Hz, but the input range was +/-5 Volts.

AdLIGO 4

LIGO-G050318-00-C

Requirements cont’d

» DAC

– Output Voltage: +/-10 volts, differential – Drive capability: 1Kohm load shunted by 1000pF capacitance – Output-referred noise: 200nV/√Hz for freq>100Hz, TBD @10Hz[1] – Sample Rate: 16384 samples/second, nominal [1] Output noise voltage for DACs is based on measured output noise of the present LIGO VME-based DACs manufactured by Frequency Devices.

» Binary Out

– Switching Voltage: 5 volts minimum, 30 volts maximum – Switching Current: 1 amp maximum – Switching Time: < 1milli-seconds – On-state voltage: 2 volts maximum

AdLIGO 5

LIGO-G050318-00-C

Requirements cont’d

» Binary In

– On-State voltage (logical 1): > 2 volts – Off-state voltage (logical 0): <0.8 volts – Maximum input voltage: TBD – Input impedance: >1Kohm

» Status Readback

– The state of a circuit must be capable of being read back to the controlling hardware. The success of all binary instructions to a module from CDS must be verifiable via a return signal derived from the controlled hardware.

» Propagation of Signals

– Shielded-twisted pairs – Coax

AdLIGO 6

LIGO-G050318-00-C

Requirements cont’d

» Test points- Internal and external test points required to aid in debug, testing and verification » Circuit Protection- Circuits must protect themselves against reversed power, missing power supplies, shorts, opens, etc. » Local Voltage Regulation » Modularity and Commonality of parts

AdLIGO 7

LIGO-G050318-00-C

ISC/SUS Block Diagram

SEI Input Optics (IO) & Output Optics Quad SUS

φ

Mix I/F PD

RF Osc.

I/F PD I/F PD MODULATION DETECTION DETECTION MODE CONTROLLER ACQUISITION MODE CONTROLLER MODE SWITCHING ALGORITHM SUS CPU SUS ADC SUS DAC Local Control DeWh Filters AI Filters I/F Reflected Memory? I/F Reflected Memory? UIM DeWh Filters Penultimate DeWh Filters ESD DeWh Filters AI Filters AI Filters AI Filters Local Control Wh Filters AA Filters Coil Drivers (6) Coil Drivers (6) Coil Drivers (6) Coil Drivers (6) ES Drivers UPPER MASS UIM PM TM

12 12 4 4 5

ISC Global Actuator ISC Global Actuator ISC Global Actuator SUS Local Actuator PSL IO/IMC DAQ GDS 5 BSC Systems per IFO 6 HAM Systems per IFO SUS/UK per IFO: ETMx, ETMy (quads) ITMx, ITMy (quads) FMx, FMy (triple; folded IFO only) BS (triple) SUS/US per IFO: PRM (triple) SRM (triple) IMC2 (triple) OMC (TBD) Cabling from Drivers to Vacuum Chamber Feed- Throughs is SUS/US Responsibility Cabling from Vacuum Chamber Feed-Throughs to SUS I/F Connector & Bracket is SEI Responsibility OSEM Sensor I/F

SUS/US SUS/UK

ISC AND SUS INTERFACE BLOCK DIAGRAM

ISC

Digital I/O

φ

Mix Mix

φ

CONTROLLERS SUPERVISORY CONTROL Timing System Network Packaging & Channels per Module are TBD Packaging & Channels per Module are TBD Φ = Phase adjuster PD = PhotoDiode I/F = Interface AI = Anti-Image Filter AA = Anti-Alias Filter DeWh = De-Whitening Filter Wh = Whitening Filter ES = Electro-Static UIM = Upper Intermediate Mass PM = Penultimate Mass TM = Test Mass Optical Radio Frequency (RF) Control/Monitor Audio Frequency (AF)

AdLIGO 8

LIGO-G050318-00-C

US-UK Interfaces and responsibilities

Simply stated, the responsibilities for the UK and US

are:

» UK

– OSEMs – OSEM LED drive and PD readback electronics – OSEM Coil Drive electronics – Electro-Static Drive electronics

» US

– All vacuum cabling and connectors required to propagate signals to/from OSEMs and ESD actuators – All external cable and connectors – Power supplies – All anti-alias, whitening, anti-image, dewhitening, etc to match to ADCs and DACs.

AdLIGO 9

LIGO-G050318-00-C

US Responsibilities cont’d

» US responsibilities (cont’d)

– All ADCs, DACs, BIO required – All computing hardware and software required – All networking hardware and software required – Racks and subracks, TBD depending on location of equipment

AdLIGO 10

LIGO-G050318-00-C

US to UK Interfaces

OSEM to Vacuum cable » US to provide all vacuum cable and the required female 9-pin MicroD connector to mate to the OSEM. » OSEM pinout per the ICD OSEM Satellite Module Output Connector Cable to

• Vac. Flange

» US to provide 25 pin shielded, twisted pair cable and connectors required to mate Satellite amp to vacuum flange. » Pinout and gender of connectors per the ICD

AdLIGO 11

LIGO-G050318-00-C

US to UK Interfaces cont’d

OSEM Satellite Amp to OSEM Drive Electronics

Cable

» US to provide 25 pin, shielded, twisted pair cable required to mate OSEM Drive Electronics Module to Satellite Amp. » Pinout and connector genders per the ICD. OSEM Drive Electronics to AdL Controls » US to provide 25 pin, shielded, twisted pair cable required to interface the OSEM Drive Electronics Module to US-provided AA, whitening, AI, dewhitening, etc. » Pinout and connector genders per the ICD

AdLIGO 12

LIGO-G050318-00-C

US to UK Interfaces cont’d

ESD Actuator to Vacuum Cable » US to provide all internal vacuum cables, feedthroughs and connectors required for ESD. » Cable types, etc. are TBD. Bob Taylor has sample and some quotes from Accu-Glass and Coonar. ESD Amp to Vacuum Flange » US to provide all coax cables required to connect ESD amp output to vacuum flange ESD Amp to AdL Controls » US to provide 15 pin, shielded, twisted pair cable required to interface ESD Amp to US-provided AA, whitening, AI, dewhitening, etc. » Pinout and connector genders per the ICD

AdLIGO 13

LIGO-G050318-00-C

US to UK Interfaces cont’d

Power Supplies » US to provide all DC power required for UK modules and racks » Power forms and requirements per the ICD

AdLIGO 14

LIGO-G050318-00-C

AdL Quad SUS Controls Block Diagram

• The controls for the L1 and L2

stages are each roughly equivalent to what is presently required for a single LIGO LOS.

• A simple scaling using the number
• f IO, FMs, etc. shows that each

quad is approx. equivalent to 4 LIGO LOS’s.

• Present 40M linux CPUs handle 4
• ptics, so we could implement the

system with our existing controls architecture, if needed. We could also use a variation of some of the PCI-based controls that has been used recently.

• The increased number of IO points,
• etc. will need to be factored into any

AdL CDS design.

Input Matrix (6x6) 6 CH

M0 L3

From ISC Global Controls FM 6 CH Output Matrix (6x6) 6 DOF FM 6 DOF 6 CH Input Matrix (6x6) 6 CH

R0

FM 6 CH Output Matrix (6x6) 6 DOF FM 6 DOF 6 CH Input Matrix (4x3) 4 CH

L2

FM 4 CH Output Matrix

• f Filters

(3x4) 12 FMs 3 DOF FM 3 DOF 4 CH Output Matrix (3x5) 3 DOF FM 3 DOF 5 CH FM 6 CH FM 6 CH FM 4 CH FM 5 CH From ISC Global Controls

+

3 DOF FM Input Matrix (4x3) 4 CH

L1

FM 4 CH Output Matrix

• f Filters

(3x4) 12 FMs 3 DOF FM 3 DOF 4 CH FM 4 CH From ISC Global Controls

+

3 DOF FM

Total Number of filter modules = 18+18+26+26+8=96 Total ADC inputs = 6+6+4+4=20 Total DAC outputs = 6+6+4+4+5=25

Control BW= 0.1Hz-3Hz Control BW= 3Hz-30Hz Control BW= 30Hz-300Hz

AdLIGO 15

LIGO-G050318-00-C

AdL Quad SUS Controls Status

• Vacuum Cables and connectors

» Prototypes for the vacuum harnesses and cables are being fabricated for use on the quad test stand at CIT. » Additional cables and harnesses will be fab’d for LASTI » AdL SEI is using the same types of cables, connectors and conventions as AdL SUS

AdLIGO 16

LIGO-G050318-00-C

Status cont’d

• System layout and Design

» Cable diagrams per the ICD have been generated for a LASTI implementation » AA, whitening, AI, dewhitening TBD pending selection of ADC, DACs, BIO for LASTI controls » AdL CDS architecture designs are in progress and should converge prior to LASTI need

• date. If not we could implement with an interim solution– VME, PCI, etc. and LIGO-like

controls (not DSpace). These controls would then be integrated with the AdL SEI controls and the existing LASTI infrastructure.

Seismic Table

• 17V In

• 17V In

• 17V Out

• 17V Out

Vacuum Flange

AdLIGO 17

LIGO-G050318-00-C

Unresolved Issues

Monitors

» In LIGO we had auxiliary monitors for:

– Coil driver output current, rms current, output voltage, current fault – OSEM PD voltage – Many others- We tended to err on the side of overkill

Mode Switches and readbacks for coil drivers and ESD

» In LIGO we had switches for:

– Coil Driver Run/Acquire, Coil Driver Test input enable, Coil Driver enable – Whitening and dewhitening enable

Test inputs and test monitors AC vs. DC drive of ESD Interlocks and watchdogs