Mirror Deformation Modeling for HANDS (High Accuracy Network Determination System) Jeremy Steel Mentors: Scott Gregory Curt Leonard.

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

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

Why?Why?

• Exploitation of Exploitation of SpaceSpace– CommercialCommercial– MilitaryMilitary

• National defenseNational defense

– EducationEducation– researchresearch

• Prevent collisionsPrevent collisions– Very expensiveVery expensive

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

The SystemThe System

• Dome and controlsDome and controls

• Mount controlsMount controls

• Weather stationWeather station– WindWind– RainRain– TemperatureTemperature– HumidityHumidity– Barometric pressureBarometric pressure

• Sophisticated softwareSophisticated software

The TelescopeThe Telescope

• Designed and Built Designed and Built at the tech park in at the tech park in KiheiKihei

AutoCADAutoCAD

• 2D 3D modeling2D 3D modeling

2D/3D Models2D/3D Models

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

Mirror ModelingMirror Modeling

• Solid and Solid and HeavyHeavy

• Change the Change the structure structure

• Measure Measure deformatiodeformationn

~47.11 ~47.11 lbslbs

~40.11 lbs~40.11 lbs

4 pocket4 pocket

2 pocket2 pocket

More More flexibleflexible

Less flexibleLess flexible

Model Model Deformations Deformations

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

Material ComparisonMaterial Comparison

ULE

Pyrex

PyrexPyrex

3.434e^-11 mm3.434e^-11 mm

3.517e^-11 3.517e^-11 mmmm

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

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.

QUESTIONS?QUESTIONS?