# Presentation: 353490

## Use of Robust DesignTM by MSC Software for Automatic Aerospace Design, Performance Optimization, and Accelerating Engineering Development

**Use of Robust Design****TM by MSC Software**** for Automatic Aerospace Design, Performance Optimization, and Accelerating Engineering Development**

**Fred Perkins**
**Federal Engineering Associates**
**McLean, Virginia**

## Helps reveal real high performance design drivers – even to rocket scientists

**Helps reveal real high performance design drivers – even to rocket scientists**
**Improves the focus of FEM, reducing analysis time and accelerating engineering development, reducing cost and time to achieve superior results**
**Helps eliminate unknown unknowns**
**Improves FEA validation while enhancing the value of test data **

## Slide 3

## Unlimited Model Sophistication

**Unlimited Model Sophistication**
**Unlimited Coupled Outputs (for supported solvers)**

**Notes:**
A Decision Map = Structured Information.
A Decision Map has the objective of helping the engineer to:
Understand how a system works (how information flows within the system, how variables and components correlate).
Make decisions as to how the design may be improved.
Find the weak points in a system.
Find redundancies in a design.
Identify rules that govern the performance (“if A and B then C”).
Decision Maps help to structure information better, to give it “topology” and a sense of dimension.
Structured information (i.e. links between rules) is equivalent to knowledge.

It is possible to see how the scatter (tolerances) in ALL the inputs influences the scatter of a certain output.

These influences are NOT sensitivities, but Spearman correlations (essentially a ranking of the variables) – they reflect the relative contributions of all the variables to the scatter of the output variable being considered

Yellow/brown circles = input (design) variables, blue/green/red = outputs

## Slide 5

## Slide 6

## Slide 7

## Modern optical and other experimental mechanics measurement systems produce large datasets of high precision static and dynamic data

**Modern optical and other experimental mechanics measurement systems produce large datasets of high precision static and dynamic data**
**Robust DesignTM promises a path to automation of many FEA validation and optimization tasks, leading to better models and faster results.**

## Slide 9

## Courtesy EADS-CASA

## Slide 11

## Courtesy EADS-CASA

**Notes:**
Note: 200 kg of the total mass was not active in the SDI process – these were metallic arts (flanges). So, effectively, SDI only worked with 236 kg, and managed to reduce mass by over 70kg.

## We’re all rocket scientists here!

**We’re all rocket scientists here!**
**A quick test! – What is the principal source of Von Mises stress in our candidate satellite design during launch?**

## Slide 14

## Slide 15

## Original Design Point

**Original Design Point**

**Targeted Optimization**

## Robust DesignTM enhances the value of your MSC NASTRAN FEM - spend less time and money achieving superior results

**Robust DesignTM enhances the value of your MSC NASTRAN FEM - spend less time and money achieving superior results**
**Verify stability and robustness of high performance design solutions**
**Reveal unknown unknowns, especially when modifying designs**
**Increase value of experimental data for FEA validation and optimization**