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![Page 1: Mirror Deformation Modeling for HANDS (High Accuracy Network Determination System) Jeremy Steel Mentors: Scott Gregory Curt Leonard.](https://reader036.fdocuments.in/reader036/viewer/2022062321/56649dc55503460f94ab94f3/html5/thumbnails/1.jpg)
Mirror Deformation Mirror Deformation Modeling for HANDSModeling for HANDS
(High Accuracy Network (High Accuracy Network Determination System)Determination System)
Jeremy SteelJeremy Steel
Mentors: Scott GregoryMentors: Scott GregoryCurt LeonardCurt Leonard
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What is HANDS?What is HANDS?
• An optical system which canAn optical system which can– Track objects in spaceTrack objects in space– Give highly accurate coordinates of Give highly accurate coordinates of
objects orbiting the earth (Metrics)objects orbiting the earth (Metrics)•By using an optical sensor and radio By using an optical sensor and radio
transponder which receive different pieces transponder which receive different pieces of location dataof location data
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Why?Why?
• Exploitation of Exploitation of SpaceSpace– CommercialCommercial– MilitaryMilitary
• National defenseNational defense
– EducationEducation– researchresearch
• Prevent collisionsPrevent collisions– Very expensiveVery expensive
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ObjectivesObjectives
•To set up a working optical system •Transfer telescope design from Autocad
to Solidworks for weight analysis• Mounts
•Perform gravitational sag analysis on mirrors using Cosmos• Light
•Very structure and material properties, reanalyze sag and compare
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The SystemThe System
• Dome and controlsDome and controls
• Mount controlsMount controls
• Weather stationWeather station– WindWind– RainRain– TemperatureTemperature– HumidityHumidity– Barometric pressureBarometric pressure
• Sophisticated softwareSophisticated software
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The TelescopeThe Telescope
• Designed and Built Designed and Built at the tech park in at the tech park in KiheiKihei
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AutoCADAutoCAD
• 2D 3D modeling2D 3D modeling
2D/3D Models2D/3D Models
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SolidWorksSolidWorks
• Transfer and Transfer and assemble assemble individual partsindividual parts
• Material PropertiesMaterial Properties– MassMass– Yield strengthYield strength
• Change materials Change materials and structures of and structures of partsparts– MirrorsMirrors
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Mirror ModelingMirror Modeling
• Solid and Solid and HeavyHeavy
• Change the Change the structure structure
• Measure Measure deformatiodeformationn
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~47.11 ~47.11 lbslbs
~40.11 lbs~40.11 lbs
4 pocket4 pocket
2 pocket2 pocket
More More flexibleflexible
Less flexibleLess flexible
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Model Model Deformations Deformations
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RedRed = most = most deformationdeformation
3.433e^-11 3.433e^-11 mmmm
1.201e^-10 1.201e^-10 mmmm
BlueBlue = least = least deformationdeformation
4 pocket4 pocket
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Material ComparisonMaterial Comparison
ULE
Pyrex
PyrexPyrex
3.434e^-11 mm3.434e^-11 mm
3.517e^-11 3.517e^-11 mmmm
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Summary Summary
• Transfer telescope design from Autocad to Solidworks for weight analysis
• Perform sag analysis on mirrors using Cosmos
• Very the structure and material properties, and reanalyze and comparer results
• System is still a work in progress• Specify acceptable error• More mirrors• More telescopes• Always room for improvement
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AcknowledgmentsAcknowledgments• OceanitOceanit
– Curt LeonardCurt Leonard– Scott GregoryScott Gregory– StaffStaff
• CFAOCFAO• Akamai Internship Akamai Internship
ProgramProgram– Malika BellMalika Bell– Lisa HunterLisa Hunter– Liz EspinozaLiz Espinoza
This project is supported by the National Science This project is supported by the National Science Foundation Science and Technology Center for Foundation Science and Technology Center for Adaptive Optics, managed by the University of Adaptive Optics, managed by the University of
California at Santa Cruz under cooperative California at Santa Cruz under cooperative agreement No. AST - 9876783. agreement No. AST - 9876783.
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QUESTIONS?QUESTIONS?