Inventor CAD System Integration

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Inventor CAD System Integration
Engineering Group 402-150 Eglinton Ave. E.,
Toronto ON M4P 1E8 Phone [phone]

• Michael Trauttmansdorff
• michael_at_trauttmansdorff.ca
• 416 528 1253

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Introduction and Outline

• Model of the Wildfire Spacecraft
• Overview of CAD using Inventor
• Parametric Modeling
• Advanced Parameter Control
• Optimization Process
• Closing the design loop

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1. Model of the Wildfire Spacecraft

• The CAD Model serves several purposes
• Visualization
• Determine mass moments of inertia
• Geometry for FEA Analysis
• Final Production Drawings

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1. Model of the Wildfire Spacecraft
Engine
Aeroshell
Fuel Tank
Capsule
Rendering of the model in AutoDesk Inventor 7
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2. Overview of CAD using Inventor

• Inventor is a fully parametric modeling
  environment
• This means that part dimensions can be linked,
  and made interdependant

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2. Overview of CAD using Inventor
Parameterization In Action
This Dimension sets the height of the truss
Truss in rocket block connecting the solid motor
to the primary fuel tank
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2. Overview of CAD using Inventor
Parameterization In Action
Changing this dimension modifies the entire truss.
Truss in rocket block connecting the solid motor
to the primary fuel tank
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2. Overview of CAD using Inventor

• Advanced Parameters Control
• AutoDesk Inventor can link all of its parameters
  to a spreadsheet
• Using excel, a parameter control sheet is created
  which contains all the dimensions which affect
  the model
• This sheet, instead of part specific dialog
  boxes, is where modifications to dimensions are
  made

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2. Overview of CAD using Inventor
Subsystem Analysis And Calculation Sheet
Capsule Subsystem Parameter Sheet
Subsystem Analysis And Calculation Sheet
Capsule Subsystem Parameter Sheet
Capsule Design Overview
Subsystem Analysis And Calculation Sheet
Capsule Subsystem Parameter Sheet
CAD Model
Overall Design
Subsystem Analysis And Calculation Sheet
RB Subsystem Parameter Sheet
Subsystem Analysis And Calculation Sheet
RB Design Overview
RB Subsystem Parameter Sheet
Subsystem Analysis And Calculation Sheet
RB Subsystem Parameter Sheet
Concept
Implementation
Product
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3. Optimization Process

• Design optimization is achieved by iteration
• Results from one level of analysis are used to
  refine the next level.

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3. Optimization Process

• Main tools in the design process
• Matlab ? Simulation
• Inventor ? CAD
• Ansys ? FEA Analysis
• Integration is achieved by linking the outputs
  and inputs of these tools using spreadsheets

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3. Optimization Process
Information Flow in Computer Aided Design
Mission
Simulation
Analysis
Model
Fully Integrated Design
Drawings
Rocket
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3. Optimization Process

• Closing the Design Loop
• The Forward flow of design parameters ensures
  consistency
• Adding feedback allows the design to converge to
  an optimal point

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3. Optimization Process

• Current level of Integration
• Feedback between the Simulation and CAD Model
• Direct use of CAD Model in FEA using Ansys Design
  Space
• Target Level
• Full Integration

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3. Optimization Process
Information Flow in Computer Aided Design
Mission
Simulation
Analysis
-
-
Model
Feedback Integrated Design
Drawings
Rocket
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• The End