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Chapter 6Chapter 6

Developing Models and Prototypes Developing Models and Prototypes (Steps and Decision Making) (Steps and Decision Making)

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Chapter’s SectionsChapter’s Sections

Value of ModelingValue of Modeling Selecting Modeling ProcessSelecting Modeling Process Performing Design AnalysisPerforming Design Analysis Testing and Reviewing a DesignTesting and Reviewing a Design

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Why Engineers Use Modeling?Why Engineers Use Modeling?

1.1. To develop a better To develop a better understandingunderstanding of of the design problem/possible solutionthe design problem/possible solution

2.2. To To savesave time and money time and money

3.3. To reach an optimal working solution To reach an optimal working solution by by refiningrefining design ideas design ideas

4.4. To To conveyconvey ideas and information ideas and information

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What are the modeling steps?What are the modeling steps?

1.1. SelectingSelecting a modeling a modeling processprocess

2.2. PerformingPerforming design analysis design analysis of aspects and partsof aspects and parts

3.3. Performing Performing integrationintegration testingtesting

4.4. Revising, Revising, refiningrefining and and critiquing the designcritiquing the design

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6.1 Selecting a Modeling Process6.1 Selecting a Modeling Process Descriptive models: sketches & models Descriptive models: sketches & models

Predictive models: maths & logicPredictive models: maths & logic

Scale modelsScale models

Geometrical modeling: Geometrical modeling:

* wireframe model* wireframe model

* surface model* surface model

* solid models model* solid models model

Mathematical modeling Mathematical modeling

Computer simulationComputer simulation

Computer animationComputer animation

Scale Model ExamplesScale Model Examples

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Geometrical Model ExamplesGeometrical Model Examples

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Mathematical Model ExampleMathematical Model Example

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Computer Simulation ExampleComputer Simulation Example

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Computer Animation ExampleComputer Animation Example

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6.2 Performing Design Analysis6.2 Performing Design Analysis

Evaluating the sufficiency of a Evaluating the sufficiency of a designdesign

for Autonomous Robotfor Autonomous Robot

- Overall algorithm can be simulatedOverall algorithm can be simulated

- Body must be rigid and maneuverableBody must be rigid and maneuverable

- Various functionalities must be testedVarious functionalities must be tested

- Speed of robot must satisfy constraintSpeed of robot must satisfy constraint

- Functionality of sensors relative to detectable objects Functionality of sensors relative to detectable objects

- Recovery from errors must be investigatedRecovery from errors must be investigated……

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6.3 Testing The Overall Design6.3 Testing The Overall Design Testing the Testing the integratedintegrated overall design overall design

Making sure that all parts work Making sure that all parts work togethertogether

Then ..Then ..

6.4 Revising, Refining and 6.4 Revising, Refining and Critiquing The Design Critiquing The Design

By someone By someone otherother than the original designer than the original designer

To avoid ..To avoid ..

This is my baby syndrome!This is my baby syndrome!

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In SummaryIn Summary Modeling is a valuable pursuit that allows Modeling is a valuable pursuit that allows

all all kindskinds of analyses (e.g. functional, of analyses (e.g. functional, aesthetic, financial)aesthetic, financial)

Various Various partsparts and aspects of a design and aspects of a design can be modeled, forcan be modeled, for

the purpose of the purpose of improvingimproving and optimizing and optimizing the design.the design.

Integration Integration testing must not be testing must not be overlooked.overlooked.

It’s best if the task of designing and of It’s best if the task of designing and of critiquing are critiquing are separatedseparated