Transcript instituto de astrofísica de canarias

INSTITUTO DE ASTROFÍSICA DE CANARIAS
Canary Islands, SPAIN
“Hardware Developments for Fast Control
Systems”
OPTICON planning meeting
UKATC, Edinburgh
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
Field Programmable Gate Array
(FPGA)
Started on mid-80s
Configurable logic blocks
65 nm, 550 MHz
Interface to many standards
Hundreds of I/O
Recently grown to big sizes
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
FPGA main features
 Parallelism
 Speed
 Low cost
 Flexibility
 Tiny size, low power
consumption, low weight
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
FPGA vs µPs, DSPs, GPUs
 FPGAs helped conventional processors doing
interfacing, glue logic,...
 FPGAs have grown to a level capable of
accepting a microprocessor inside...
 Traditional approach is to manufacture big
quantities of a general purpose microelectronics
hardware, and write a (specific) program to solve
the specific task
 Using FPGAs, we can get rid of any program and
produce the hardware adequate for each task.
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
FPGA: Transversal key technology
Adaptive optics
Detector controllers
Phasing control for segmented mirrors
High time resolution astronomy
Lossless data compression
On-line data reduction
…
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
IAC Example
 In-house technology development project
 Examine FPGA technology and evaluate its potential for AO
 Develop know-how to be used in future AO projects for
astronomy and other fields
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L.F. Rodríguez Ramos et al. “FPGA adaptive optics system test bench”. Proc. SPIE 5903, 120128, 2005
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J.G. Marichal-Hernández, L.F. Rodríguez-Ramos et al. “Atmospheric wavefront phase
recovery using specialized hardware: GPUs and FPGAs”. Applied Optics 2005 Dec
10;44(35):7587-94
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L.F. Rodríguez Ramos et al. “Testing FPGAs for real-time control of adaptive optics in giant
telescopes ”. Proc. SPIE 6272, 2006
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
Project team
 People
Luis F. Rodriguez Ramos
PI & PM
Teodora Viera
Control Algorithm
José V. Gigante
Camera I/F, displays and
centroid computation
Fernando Gago
Frame grabbing
Guillermo Herrera
DACs I/F
Angel Alonso
Optics
Nicolas Descharmes
Optics
 Budget
4000 man-hours (~2 man-yr)
25 K€ ($30 K)
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
Experimental setup
TS
L1
MO
ATM
LS
D2
L3
LA L4
D1
BS2
50/50
BS1
SHC
50/50
D3
NDF
L2
MMDM
SC
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
Electronic system setup
PC monitor
USB camera
OAconFPGA electronic control system
USB
Frame grabber
VGA monitor
JTAG
PC computer
RS232
VGA display
module
DALSA CA-D6
Image rearrangement
IF
Centroids
computation
Difference
Errors
New ref
Matrix
computation
37 ch
AMP
Gain
DM
39 ch
D/A
I on/off
Zero
Reference
PI filters
Cuadratic
response
compensation
VIRTEX-4
Tip-tilt
mirror
Tip-tilt
driver
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
Electronic system setup
PC monitor
USB camera
OAconFPGA electronic control system
USB
Frame grabber
VGA monitor
JTAG
PC computer
RS232
VGA display
module
DALSA CA-D6
Image rearrangement
IF
Centroids
computation
Difference
Errors
New ref
Matrix
computation
37 ch
AMP
Gain
DM
39 ch
D/A
I on/off
Zero
Reference
PI filters
Cuadratic
response
compensation
VIRTEX-4
Tip-tilt
mirror
Tip-tilt
driver
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
FPGA occupancy example
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Image recomposing
Centroid calculation
Matrix computation
Linearization
PI control
1%
35%
3%
6%
2%
 Display
 Housekeeping
14%
9%
 TOTAL
70%
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
Results I
Frame clock
centroids
correction
frames, centroids
and actuation
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Last two rows
and actuation
Technology Division
Results II
Switching voltage pattern added
to the first ring of actuators (7)
64 errors in X
Servo OFF
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
39 actuators
Servo ON
Technology Division
Joint development proposed
Astronomy related building blocks
Practical System prototype
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
Building blocks development
 Never start from scratch: Lots of commercially
available IP Cores plus...
 Astronomy related building blocks, to be
developed in a joint effort and made available to
the community.
 Previous work needed in

Block identifying,
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Common development methodology,
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Agreeing interfaces
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Synthesis software evaluation

…
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
Building block examples
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FFT (2D and multi-D)
Centroid computation
Image correlation
Gaussian fitting
Sparse Matrix
Floating point arithmetic
Camera interface
Inter-boards and intra-board communication
Detector pre-processing (Flat, slope, cosmetics…)
Lossless data compression
Intersystem Synchronization
...
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
ELT AO Prototype
 Massively parallel FPGA-only system capable of
implementing all the aspects of the adaptive optics of a
giant telescope, including multi-guide star atmospheric
tomography
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ELT simulation optical bench
Hardware Processing engine (subcontract)
AO Algorithm reformulation
AO Prototype simulation
AO Prototype laboratory tests
Telescope tests at OGS(1m) + WHT(4,2) + GTC(10m)
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
Work breakdown and schedule
Tentative work breakdown and schedule:
Name
Methodology agreements, building blocks identification, interface
definitions
Building blocks development
Adaptation of selected algorithms to FPGA, simulation
Design and development of the hardware processing engine
Prototype system implementation
Test facility design and development
Laboratory tests
Interface development with existing WHT (4.2m) telescope AO system
Telescope tests at WHT
Interface development with GTC (10m) telescope AO system
Telescope tests at GTC
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Due date
T0 + 1y
T0 + 2y
T0 + 2y
T0 + 3y
T0 + 2y
T0 + 3.5y
T0 + 4y
T0 + 5y
T0 + 5.5 y
T0 + 6y
Technology Division
Cost idea
Coordination:
Man-power:
Subcontracts:
20.000 €/y
200.000 €/y
50.000 €
TOTAL approx:
1.2 M€
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division
Thank you
Luis F. Rodríguez-Ramos
Instituto de Astrofísica de Canarias
Technology Division