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

What is HANDS? An optical system which can An optical system which can –Track objects in space –Give highly accurate coordinates of objects orbiting the earth (Metrics) By using an optical sensor and radio transponder which receive different pieces of location data By using an optical sensor and radio transponder which receive different pieces of location data

Why? Exploitation of Space Exploitation of Space –Commercial –Military National defense National defense –Education –research Prevent collisions Prevent collisions –Very expensive

Objectives 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 System Dome and controls Dome and controls Mount controls Mount controls Weather station Weather station –Wind –Rain –Temperature –Humidity –Barometric pressure Sophisticated software Sophisticated software

The Telescope Designed and Built at the tech park in Kihei Designed and Built at the tech park in Kihei

AutoCAD 2D 3D modeling 2D 3D modeling 2D/3D Models

SolidWorks Transfer and assemble individual parts Transfer and assemble individual parts Material Properties Material Properties –Mass –Yield strength Change materials and structures of parts Change materials and structures of parts –Mirrors

Mirror Modeling Solid and Heavy Solid and Heavy Change the structure Change the structure Measure deformation Measure deformation

~47.11 lbs ~40.11 lbs 4 pocket 2 pocket More flexible Less flexible

Model Deformations

Red = most deformation 3.433e^-11 mm 1.201e^-10 mm Blue = least deformation 4 pocket

Material Comparison ULE Pyrex Pyrex 3.434e^-11 mm 3.517e^-11 mm

At 90 deg 4 pocket deforms more At 90 deg 4 pocket deforms more At 45 deg 2 pocket deforms more At 45 deg 2 pocket deforms more Decision making Decision making

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

Continued Research Modeling other telescopes and mirrors Modeling other telescopes and mirrors More and different materials More and different materials

Objectives Model and analyze telescope components (Mirrors) Model and analyze telescope components (Mirrors) Create a telescope Create a telescope –Analyzing and optimizing all components Set up a network of systems around the world Set up a network of systems around the world Track and gather metric data Track and gather metric data

Acknowledgments Oceanit Oceanit –Curt Leonard –Scott Gregory –Staff CFAO CFAO Akamai Internship Program Akamai Internship Program –Malika Bell –Lisa Hunter –Liz Espinoza This project is supported by the National Science Foundation Science and Technology Center for Adaptive Optics, managed by the University of California at Santa Cruz under cooperative agreement No. AST

QUESTIONS?