1 Chapter 6 Developing Models and Prototypes (Steps and Decision Making)

2 Chapter’s Sections Value of Modeling Value of Modeling Selecting Modeling Process Selecting Modeling Process Performing Design Analysis Performing Design Analysis Testing and Reviewing a Design Testing and Reviewing a Design

3 Why Engineers Use Modeling? 1. To develop a better understanding of the design problem/possible solution 2. To save time and money 3. To reach an optimal working solution by refining design ideas 4. To convey ideas and information

4 What are the modeling steps? 1. Selecting a modeling process 2. Performing design analysis of aspects and parts 3. Performing integration testing 4. Revising, refining and critiquing the design

5 6.1 Selecting a Modeling Process  Descriptive models: sketches & models  Predictive models: maths & logic  Scale models  Geometrical modeling: * wireframe model * wireframe model * surface model * surface model * solid models model * solid models model  Mathematical modeling  Computer simulation  Computer animation

Scale Model Examples 6

Geometrical Model Examples 7

Mathematical Model Example 8

Computer Simulation Example 9

Computer Animation Example 10

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Performing Design Analysis  Evaluating the sufficiency of a design  for Autonomous Robot - Overall algorithm can be simulated - Body must be rigid and maneuverable - Various functionalities must be tested - Speed of robot must satisfy constraint - Functionality of sensors relative to detectable objects - Recovery from errors must be investigated …

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Testing The Overall Design  Testing the integrated overall design  Making sure that all parts work together Then Revising, Refining and Critiquing The Design  By someone other than the original designer To avoid..  This is my baby syndrome!

16 In Summary Modeling is a valuable pursuit that allows all kinds of analyses (e.g. functional, aesthetic, financial) Modeling is a valuable pursuit that allows all kinds of analyses (e.g. functional, aesthetic, financial) Various parts and aspects of a design can be modeled, for Various parts and aspects of a design can be modeled, for the purpose of improving and optimizing the design. the purpose of improving and optimizing the design. Integration testing must not be overlooked. Integration testing must not be overlooked. It’s best if the task of designing and of critiquing are separated It’s best if the task of designing and of critiquing are separated