Transcript presentation

Parametric Oscillator
Demonstration for NGAO
Requirements Review
Sept 9, 2010
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Agenda
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Requirements Doc comments
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Format of Comments
• Text / section comment applies to
• Comment
• Response / update
SOW comments
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Same format as above
Top Level Schedule
Near Term Status
Next Steps
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Requirements Doc
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Section 5: System Requirements
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PW: You only cover the Microgate requirements here. Will there be a separate
set of requirements for the overall project. What I think is missing for the overall
project is the software changes on the AO side, characterization and
documentation of the performance and changes to the user/operator
documentation.
This is meant to be a overall requirements document not just for MG
Jitter Reduction Algorithm (SR-001)
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The Keck II AO software shall use a parametric oscillator algorithm as
detailed in KAON 680, see reference [2].
PW: Is this algorithm sufficiently clearly defined in KAON 680 for Microgate to
proceed?
Chris will be working on a new document
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Requirements Doc
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PW: There is also dual NGS mode where the TT error is
determined from STRAP. Do we want to cover this? Since this
is good for testing we probably should.
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NGS mode with STRAP sensor (SR-004)
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The parametric oscillator shall be capable of working with NGS
targets where the tip tilt error is determined from the STRAP
sensor and the higher order wavefront error is determined from
the SciMeasure wavefront sensor camera.
Down Tip Tilt mode (SR-005)
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The parametric oscillator shall be capable of working with
down tip tilt system only. The parametric oscillator will not be
required to work on the upward tip tilt of the LGS system.
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Requirements Doc
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Allowable Delay in Tip Tilt Servo Loop (SR-007)
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The parametric oscillator parameters shall not increase the delay in processing the tip tilt
servo commands by more than 5 (TBC) microseconds. When it is disabled, the parametric
oscillator shall add no additional delay in processing the servo commands.
Discussion: Instead of specifying the delay in executing the parametric oscillator algorithm,
we could state that the current execution rate of the tip-tilt correction at 70 KHz be
maintained; in other words, addition of the parametric oscillator should not create changes
to the current execution rate of the tip-tilt correction.
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PW: Is it really 70kHz?
EJ: 70 kHz is the loop rate of the closed loop mirror positioning system, not the
atmospheric TT controller.
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Allowable Delay in Tip Tilt Servo Loop (SR-009)
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The parametric oscillator software shall not increase the delay in processing the
tip tilt commands beyond its current value. When it is disabled, the parametric
oscillator software shall add no additional delay in processing the servo
commands.
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Requirements Doc
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Allow Update of Parametric Oscillator Parameters Only When Tip Tilt
Loop is Open (SR-009)
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The software shall only allow an update of the parametric oscillator
parameters given in SR-008 when the tip tilt tracking loops are open.
Discussion: This requirement is needed to ensure that the tracking
loop makes a smooth transition from open to closed loop.
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PW: Why would changing the parameters when you are closed loop
impact the transition from open to closed loop? What is the issue with
changing the parameters when the loop is closed?
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Discussion: In order to have bumpless transfer from going open to
close loop, it's a good idea to change parameters in open loop. Also,
we shouldn't be tweaking performance parameters too often and
therefore don't see this as being an operational issue.
This is intended to prevent any kind of instability when in closed loop if
the gains change
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Requirements Doc
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Adapted to Changing AO Frame Rate (SR-010)
• The parametric oscillator delay and gain parameters shall be
changed as the AO frame rate is modified. The parametric
oscillator delay and gain parameters shall change as the AO frame
rate ranges between 1.054 KHz (current maximum update rate of
Keck II NGWFC) and 80 Hz. For frame rates below 80 Hz, the
parametric oscillator will be disabled.
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PW: This statement isn’t obvious to me. The vibration phase and gain
don’t change as you change the AO frame rate. Can’t you express
these in some absolute form so that they do not need to change?
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The par osc phase and gain needs to change as the AO frame rate
changes. We will be updating the introduction to include more
information.
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Requirements Doc
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Overall Reliability (SR-014)
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The parametric oscillator requirements must in no way compromise
the reliability of the Keck II AO system.
Overall System Performance (SR-015)
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The parametric oscillator shall not degrade current performance of the
existing system.
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PW: Do you mean when it is not in use or when it is in use? If it is
when it is in use this means that it must be 100% reliable which might
be asking too much. If it is when it is not in use then you need a
separate reliability requirement for when it is in use.
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We concluded this requirement no matter how its written is not testable
since we don't have any baseline so we will be removing it; also if SR009 Allowable Delay in Tip Tilt Servo Loop is met, we will be okay
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Statement Of Work
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Implementation Plan
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EJ: Remote access will be difficult for debugging real-time
computations. I think Microgate has most of a 4th system they
can use for this. Remote access will probably only work for lab
I&T. I think some kind of travel or equipment shipment will still
be required. They need to have access to the boards in the
NGWFC and see the leds. Maybe you can rig up a web cam
they can use (although there is still the issue of needing the
lights on in the room). I think remote access will not help all that
much.
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Initiated email communication with Roberto of MG to find out
what they have / need.
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Statement Of Work
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Intellectual Property Rights
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PW: Does this fully address the intellectual property rights issue?
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Went through Margarita -> Richard Haley -> Gavin
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Intellectual property rights to all deliverables to WMKO shall be governed by the
following considerations: Foreground intellectual property (FIP) is defined as
intellectual property developed as a result of work performed under the contract
resulting from this SOW. Background intellectual property (BIP) is defined as
intellectual property belonging to the RTC vendor and developed prior to the
start of the contract resulting from this RFP.
The RTC vendor shall grant to CARA a royalty free non-exclusive license to all
BIP required for, or used in, any deliverables, including software source code.
Ownership of all FIP, including all software source code shall belong to CARA.
CARA shall grant to the RTC vendor a non exclusive license to all FIP
developed as a result of work performed under the contract resulting from this
RFP.
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Statement Of Work
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Configuration Management
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EJ: The issue of the flash makes this a little more complicated. You will need to manage the
upload of new flash firmware and the switching between old and new versions, and, finally,
the possible reversion of flash if needed.
SL has contacted EJ and is gathering the necessary information
Schedule
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EJ: Need some more detail. When is I&T going to occur? This is pretty aggressive. Can MG
meet this schedule?
Added lab and summit integration to schedule and indicated that everything is TBD to
indicate that its needs to be agreed to by MG
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Top Level Schedule
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Near Term Schedule Status
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1.1 Demonstration Planning
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Due: 9/6/10
Status: 95% complete
1.2 Preparation
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Due: 8/11/10
Status: 50% complete
1.3.1 Requirements Document
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Due: 9/17/10
Status: 90% complete
1.3.2 Generate SOW
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Due: 10/1/10
Status: 90% complete
1.3.3 Writeup Contract with Microgate
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Due: 10/15/10
Status: not started
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Next Steps
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Complete 1.2 Preparation
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Parametric Oscillator algorithm background investigation
NGWFC architecture background investigation
Wavefront Processor (WFP) and Interface (WIF)
documentation and code review
Wavefront Controller Command Processor (WCP)
documentation and code review
Setup and document software development environment at
Waimea HQ
Setup and document NGWFC lab hardware at Waimea HQ
Finalize 1.3.1 & 1.3.2 Requirements Doc and SOW
Start 1.3.3 Microgate Contract
Confirm 1.3.4 Microgate remote access
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