Download Introduction to REMOTES: Reliable Modular Telescope Solution

Introduction to REMOTES:
Reliable Modular Telescope Solution
Michal Jakubec et al.
AI AS Czech Republic
CTU FEE Prague
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Agenda
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Motivation & Objectives
Module Architecture
Software Support
D50 Control Solution
Future Evolution
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Motivation of D50 Rework (AS-IS)
• Slow telescope drives
( 0.8 deg/s)
• No automatic failover
processes
• Operation completely
based on PC control
• No direct telescope
position feedback
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Objectives of D50 Rework (TO-BE)
• More powerful servo units
( 20 deg/s)
• Absolute position sensors
on both axes ( 2.3 arcmin)
• Incremental sensors with
interpolation ( 1 arcsec)
• Automatic failover
mechanisms (telescope
parking, closing of roof)
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Module as a Heart of Solution
• Robust metal housing
for better durability and
EMC
• Peripheral board
(optional)
• Main board (mandatory)
• Sockets, connectors
and cabling
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Main Board of the Module
• Based on ATxmeta256A3
microcontroller
(256 KB Flash, 16KB RAM)
• Two 10 Mb/s Ethernet
ports with PoE
• Two RS-232/422 serial
ports
• 24 inputs/output for
general use (GPIO)
• JTAG for debugging
GPIO
GPIO
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Designed for Reliability
• Redundant Ethernet
ports
• Redundant power
inlets (PoE)
• Microcontroller
battery backup
• Continuous voltage
monitoring
• Power outage
detection
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Ready for Maintenance
• Small command set valid
for all modules
• Discoverable register set
unique for each module
• Complex commands
as user-defined macros
:> MOVE 12450
• Commands independent
on the type of comm. line
• Universal management
and diagnostic application
Register Name
Value
CurrentPosition
12340
TargetPosition
MOVE @0:
Command
SET TargetPosition = @0
SET Command = Slew
State
WAITFOR State = Idle
ASSERT CurrentPosition = Target Position
END
12340
Empty
Idle
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Universal Management Application
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D50 Telescope Control Solution
• Communication over
redundant network
• Directed by RTS2 control
system over serial line
• Mounting drives control
(hour angle, declination)
• Site peripherals control
(e.g. roof open/close,
weather detection)
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Members of the Project
Namee
Role
Main interest
Jan Štrobl
Observation Supervisor
Specification of key requirements
Michal Jakubec
Solution Architect
Overall design strategy of the project
Petr Skala
Solution Developer
Design of position control module
Rendering of 3-D visualisation
Milan Sedláček
Solution Developer
Design of site control module
Martin Nekola
Solution Developer
Development of firmware routines
Martin Blažek
Main Observer
Validation of key requirements
René Hudec
Project Stakeholder
Operational and financial supervision
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Future Evolution
• Direct integration with imaging equipment
(control of cameras, focusers, filter wheels)
• Fowerful graphical software suite for complete
observation control and monitoring
• Support of TCP/IP protocol family
• Physical network based on Fast Ethernet
(100 Mb/s)
• Choice of more powerful MCU platforms
(ATxmegaA1, ARM, etc.)
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Conclusion
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Motivation & Objectives
Module Architecture
Software Support
D50 Control Solution
Future Evolution
Questions?
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