Setup of 5m Inflatable Antenna

1
NASA Technology Days
Overview Briefing
for
IODA Software (Integrated Optical Design and
Analysis)
9 May 2001
Developed Under Contract No. NAS8-0005 (Nov
99-Nov 01)
Presented by Jim Moore
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Overview

• Integrated Modeling Approach and Philosophy
• Data Flow When Using IODA Software
• Description of Individual Software Features
• Current Status of Development
• Summary

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Objectives and Approach
IODA Simplifies and Automates Data Sharing for
Concurrent Design by a Diverse Team of
Engineering Specialist
Integrated Modeling Approach 1
Performance Require- ments / Metrics
TemperatureF(x,y,z,t)
Figure F(x,y,z,t)
Geometry and Materials
Design

• Typical Tools
• NASTRAN
• PATRAN
• ANSYS
• IDEAS

Dynamics
Stress
Thermal
Optics
Integrated Modeling Approach 2 IODA Data Fusion

• Typical Tools
• SINDA
• THERMAL DESKTOP
• TRASYS
• NEVADA

• Typical Tools
• Code V
• ZMAX

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Schematic of Data Flowand Software Interactions

• NASTRAN / PATRAN?
• Mechanical Design
• Deformed Shape
• Dynamic Response

IODA Software
Import Geometry Data
Set Up Analysis Cases and Verify
Multiple Resolution Model Temperature Map
Graphical Review and Verification
Post Processing - Select / Filter Data to
Identify Optical Surfaces

• Thermal DESKTOP?
• Radiation Exchange
• Steady State or Dynamic Temperatures

Manipulate and Evaluate Zernike Terms and Display
Calculate Zernike Coefficients and/or
Interference Files for Optical Elements
Map Displaced Surface Figure to Optical Model

• Code V?
• Optical System Design and Optimization
• Optical Performance Metrics

Run Pre-Selected Optical Analysis to Generate
Performance Metrics
Meets Performance Requirement
Meets Performance Requirement
YES Design Satisfactory
NO Next IterationDesign Modification
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Importing Model Data

• IODA Model Derived from NASTRAN Data File
• Compatible Element Types
• CQUAD
• CTRIA3
• CBAR
• CHEXA
• CPENTA
• Arbitrary Orientation
• Many Optical Elements Can Be Included in Analysis

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Model Visualization and Editing
IODA Provides a Common Graphical Database
Accessible by All Team Members
Temperature Contours

• IODA Uses OpenGL 3D Graphics to Display the
  NASTRAN Model
• Node Points
• Element Polygons
• Constraint Points
• Temperature and Pressure Gradients
• Coordinate Axis
• Model Can Be Rotated and Translated
• Deformed Model Visualization
• Limited Editing of Materials, Load Cases, and
  Constraints for Parametric Studies

Deformed Geometry
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Thermal Model / Structural Model Variable
Resolution Mapping
IODA Uses Bi-Linear Interpolation Routine to Map
Templates to Independently Descritized Surface
Models
High Resolution Structural Model
Medium Resolution Modelfor Radiation
Exchangeand Temperatures
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Data Filtering for Optical Analysis
IODA Provides Tools to Filter Structural Model
Results and Select Critical Data for Optical
Analysis

• Provides 5 Ways for the User to Identify and
  Group Optical Surface Nodes
• 1) IODA Will Auto-group Surface Nodes by Element
  Material and Attached Nodes
• 2) Manually Select a Node and Let IODA Auto-group
  Attached Surface Nodes
• 3) Manually Select Three Nodes and Let IODA
  Auto-group Attached Surface Nodes Within
  Prescribed Surface Normal Angle
• 4) Manually Select All Nodes
• 5) Pre-group Nodes in PATRAN
• Associates Groups With Optical Surfaces in Code V

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Zernike Fit and Editing Routine
IODAs Zernike Routines Are Used for Model/Test
Correlation

• Born and Wolf Zernike Modeling
• Complications Resulting From Model Translation
  and Fast Optics Are Addressed
• Individual Terms Can Be Turned on or off for
  Display
• Zernike Terms Can Be Calculated for Any Optical
  Group in the Model

Displacement, Zernike Contour, and High Order
Zernike Terms
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Exporting Results for Optical Analysis
IODA Incorporates the Structural Results into the
Optical Analysis Using Interferogram Files

• Generates a Uniform Grid Around Each Surface
  Using the Optical Axis Direction Input by the
  User
• Uses Delaunay Triangulation to Connect Nodes With
  Triangles
• Computes Least-Squares-Fit Zernike Polynomials
  for Deflections on Each Surface
• Alternatively Computes Linearly Interpolated
  Deflections on Each Surface
• Generates Code V Interferogram Files and
  Modifies Code V Sequence Files to Calculate
  Optimal Performance Metrics

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Execute Optical Analysis and Generate Performance
Metrics
IODA Automates the Process of Generating
Parametric performance Studies Over Multiple Load
Cases
Macro Screen

• Predicted Surface of Deflections Imported Into
  CodeV
• Predefine Macros for Various Analyses
• Post-processing - View Performance Versus Load
  Case (Versus Time Is Under Development)
• Can Execute Optical Model in Batch Mode From IODA
  or Transfer Control for Interactive Modeling

MTF Versus Orientation
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Verification andDevelopment Activities

• Current Parallel Modeling Activities With NASA
  MSFC Integrated Modeling Team
• Developing Capability to Utilize Dynamic
  Simulation Results to Generate Optical Metrics
  As a Function of Time
• Complete Development of Displacement Actuator
  Optimization Capability
• Develop Commercial Spin-off Products from SBIR
  Activity
• IODA Commercial Version
• Develop Limited NASTRAN Optical Post Processor
• Interface Packages for Additional Analysis
  Packages
• Additional Informationwww.stg.srs.com/aerospace.
  htm or Iodasoft.com

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Summary

• IODA Implements Data Fusion Approach to
  Facilitate Concurrent Engineering by a Team of
  Specialist
• Engineering Team Uses Familiar/Verified Analysis
  Tools
• IODA Provides a Common Graphical Interface and
  Working Environment for All Team Members
• Software Is Internet Compatible and Facilitates
  Data Sharing Between Analysis Teams

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