Upload
others
View
4
Download
0
Embed Size (px)
Citation preview
Cryogenic and Vacuum Compatible Metrology Systems 2012 SBIR Phase I Project
1 August 2012
Mirror Tech Days – Rochester, NY
Prepared by:
Gregory Scharfstein
President
Flexure Engineering
Started at Johns Hopkins …
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 2
• Radiation-hardened Neutron Monochromator @ JHU
CryoVac Engineering
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 3
80K IR Camera (WIYN WHIRC) @ JHU
CryoVac Opto-Mechanical Systems
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 4
• JWST … 30K Engineering – Opto-mechanical designs – Cryogenic Calibration
Flexure’s Customer List
• NASA JWST (NIRCam, ISIM), MMS, ICESat-II • NASA SBIR Program • QinetiQ North America • Oceaneering • NIST • Brown University • Advanced Magnet Lab • Micro Aerospace Solutions • ASU Biodesign Institute
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 5
Purpose of Our Phase I Project
• To create a cryogenic and vacuum compatible LIDAR scanning head (LSH), integrated to a thermal-vacuum chamber, that can produce better than 5 micron, 3 sigma, measurement uncertainties on optical structures and systems at a range of 10 meters, in high vacuum, and at temperatures down to 20 Kelvin.
• To identify two metrology instruments that can leverage the technology of the cryo/vac LSH and extend the capabilities of in-situ, cryogenic metrology.
• Technology Innovation: DeepCryo Actuation, Knowledge, and Control
We define “DeepCryo” as an environment whose room
temperature is below 100K (-173 deg C / -279 deg F).
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 6
Multi-headed Metrology System
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 7
(3X) LIDAR
SCANNING HEAD
PAYLOAD TABLE
20K ACTIVE
RADIATION SHIELD
INTERNAL WINDOW
100K ACTIVE
RADIATION SHIELD
VIBRATION
ISOLATION SYSTEM
PAYLOAD /
METROLOGY
STAND
Applications of Our Innovation …
• NASA – JWST, WFIRST, NEO Missions [ISRU] to Cryogenic Destinations (Lunar
Poles, Asteroids)
– In Situ measurement of large structures in thermal-vac chambers (non-cryogenic, cryogenic)
• Non-NASA / Commercial – Superconducting Innovations for Renewable Energy (HTS Wind
Turbines, HTS Flywheels)
– The Navy’s All-Electric Ship (requires large cryogenic volumes for superconducting power creation and storage)
– Cryogenic Data Centers
– Other Extreme Environment Facilities (Beryllium manufacturing, Salt Water Test Facilities)
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 8
DeepCryo Actuation, Knowledge and Control
20K to 80K Test
Chambers
HTS Test Facility
NEO/Lunar Test
Chambers
DeepCryo Robotic
Cleanroom
DeepCryo Electronics
DeepCryo Mechanisms
DeepCryo Sensors
DeepCryo Human Interfaces
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 9
Technologies and Facilities
NEO/Lunar Test
Chambers
CubeSats Test Chambers
Lunar Crater / Asteroid Analog
Chambers
Lunar Rover Test Chambers
Lunar Volatiles Test Chambers
DeepCryo Robotic
Cleanroom
Lunar and Asteroid ISRU
/ Mining
Cryogenic Propellant Storage
and Delivery
Cryogenic Curation Facilities
Orbiting Propellant Storage
and Delivery
HTS Test Facility
HTS Power Creation, Storage
and Delivery
HTS Actuation and Control
HTS Electronics
Current Cryogenic Systems
The state-of-the-art in space environment simulation does not offer truly DeepCryo and vacuum compatible actuation, knowledge, and control.
• DeepCryo: an environment where the room temperature is below
100 K • Current technology solves the vacuum problem, but only marginally
solves the cryogenic problem … as a system • NASA Projects are challenged to take the cryogenic problem head-
on due to cost and schedule. Therefore work-arounds are typically implemented.
• In order to truly solve the cryogenic problem, it must be given the proper venue … A Research and Development Project (such as SBIR/STTR) is better suited to begin solving the DeepCryo problem.
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 10
Path to All Cold Systems
• Achievable solutions include systems that operate at higher cryogenic temperatures (220K+, i.e. mil spec COTS)
• Building hardware operable at 220K begins the long-term development path to engineer complete, DeepCryo and vacuum compatible systems.
• Continued development and funding will then bring the operating temperatures down to our target of 20K.
Essential design note: Any DeepCryo, All-Cold System, must start at about 300K (perhaps 350K to 400K for a bake-out) and “travel along the temperature dimension” until the system arrives at its operating DeepCryo destination.
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 11
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 12
Laser Radar
• Non-contact metrology
• Direct measurement of hardware surface
• 75 mircon uncertainties for a 10m range
• Not cryo or vacuum compatible
Schematic of LSH
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 13
FOCUSING OPTICS
SCANNING OPTICS
LIDAR Scanning Optics Conceptual Design from Flexure’s 2011 SBIR Phase I
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 14
ELEVATION
AXIS
LIDAR
BEAM
AZIMUTH AXIS
SCANNING
MIRROR
BELT DRIVE,
BOTH AXES
LIDAR Scanning Optics Conceptual Design from Flexure’s 2011 SBIR Phase I
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 15
LIDAR Focusing Optics Designed for 20K Operation
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 16
SCANNING
MIRROR
INVAR-
METERED
DOUBLET
50 mm
TRANSLATION
STAGE
LIDAR Focusing Optics Designed for 20K Operation
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 17
CROSS
ROLLER
BEARINGS
2-2-2
KINEMATIC
MOUNTING
2-2-2
KINEMATIC
MOUNTING
2-2-2
KINEMATIC
MOUNTING
FLEXURE
MECHANISMS
FLEXURE
MECHANISMS
FLEXURE
MECHANISMS
FLEXURE
MECHANISMS
LIDAR Focusing Optics: Cross Section Designed for 20K Operation
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 18
INVAR
METERED
DOUBLET
LIDAR Focusing Stage Designed for 20K Operation
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 19
Phase I / Phase II Activities…
• Phase I: – Integrate Scanning and Focusing Optics Assemblies
• Add motion control and positional feedback
– Flexure mechanism analysis – Baffling / Coatings – Venting / Light-weighting – Complete Error Budget for single LSH
• Phase II – Thermal Analysis and Design – STOP Analysis – Multi-Headed Error Budget (trilateration) – ETU Fabrication and Testing
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 20
Encoders from BEI
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 21
• 24-bit Resolution
• Vacuum Compatible
• Operates down to -55 degrees C [218 K]
• First Step: separate head from electronics
The Mobile Chamber
• Customized and modular thermal-vacuum metrology system
• Creates the shortest path to science by integrating the required metrology instrumentation with The Mobile Chamber.
• A leasing program for Project’s provides following benefits:
– Offload the cryogenic engineering work and start with a working chamber.
– More easily upgrade or downgrade the chamber based on changes in testing requirements
– Rely on Flexure’s extensive maintenance program to make sure The Mobile Chamber stays functional.
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 22
The Mobile Chamber
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 23
The Path Forward …
• Phase II Opportunities
– Encoders / Motion Control
– STOP Analysis
– Multi-Headed Error Budget (trilateration)
Proposal Due: 23 August 2012
8/1/2012 Mirror Tech Days - Flexure Engineering - SBIR Phase I 24