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Test 2
slides and vocab
47
Engineering
Undergraduate 1
07/30/2007

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Term
Multiview
Definition
multiple views each showing 2 of 3 dimensions
Term
Pictorial
Definition
single view with all three dimensions presented
Term
Lines types:
Definition
center line, hidden line, extension line, dimension line, visible line
Term
one way to visualize multiview projections:
Definition
glassbox
Term
standard projection of U.S. drawings:
Definition
third angle projection
Term
Line of Sight(LOS)
Definition
imaginary ray between object and observers eye
Term
Projection Plane
Definition
plane upon which the LOS is projected
Term
Sketching Procedure:
Definition
1. Determine H, W , D
2. Box in Views
3. Proportion Features and project
4. add circular views
5. darken outlines
6. add center lines
Term
3 main parts of design process:
Definition
1. Conceptual Design
2. Preliminary Design
3. Detailed Design
Term
Problem Definition of Design Process:
Definition
1. clarify objectives
2. establish user requirements
3. identify user constraints
4. establish functions
Term
Objectives
Definition
desired attributes or behaviors
Term
Constraints
Definition
strict limits the design must meet
Term
Functions
Definition
successful actions the design must perform
Term
Implementations
Definition
ways to execute your functions
Term
What is an Objective Tree?
Definition
graphical representation of objectives list
Term
How to create and Objectives List:
Definition
1. create list of of responses to problem
2. remove miscellaneous stuff
3. group similar objectives
4. created indented outline of hiearchy
5. identify similar objectives
Term
Pairwise comparison chart:
Definition
1. Directly compare 2 objectives
1 more important 0 less important
2. compare objectives from common node, at same sublevel
Term
Metrics are used for:
Definition
-select among design alternatives
- how well objectives are met
Term
How to develop Metrics:
Definition
1. Identify units and scale
2. Identify means of assessing value( survey or design)
3. Evaluate if measurement and evaluation is feasible
Term
Performance Specifications
Definition
how well design performs required functions
Term
when generating alternative designs:
Definition
1. know what already exists
2. breakdown into subcategories ( use morphological shart)
3. brainstorm ( 6 3 5 )
Term
Morphological Chart:
Definition
develop concepts for each functions
Term
Project Managment Plan
Definition
1. timeline
2. workbreakdown structure
3. gantt chart
Term
Work Break Down Structure
Definition
hiearchial breakdown of project tasks
- breakdown tasks into smaller more manageable tasks
Term
Linear Responsibility Chart
Definition
task responsibility of each individual
Term
Team Calendar
Definition
project deadlines and schedules
Term
Activity Network Chart
Definition
highlights prescendent relationships among project tasks
Term
Gantt Chart
Definition
graphical representation of timing of project tasks
Term
View Selection and Presentation:
Definition
-views for best shape
-least number of hidden lines
-space between views for dimensions
-most descriptive features
Term
Visualization Techniques
Definition
-label surfaces
-number vertices
-create physical models
-study multiview drawings
-solve missing line problems
Term
Line Precedence:
Definition
1. Visible
2. Hidden/Cutting Plane
3. Center
Term
line in a multiview represents:
Definition
-edge view of a plane
-non tangential intersection lines
-limit of curved feature
Term
types of planes:
Definition
1. normal
2. inclined
3. oblique
Term
Normal Plane:
Definition
parallel to one of standard viewing planes

-looks like edge in other views
Term
Inclined Plane:
Definition
-perpendicular to one of standard planes

-forshortened in other views
Term
Oblique Plane
Definition
not parallel or perpendicuar to any standard view
Term
when feature is not parallel to projection plane:
Definition
forshortened
Term
Through hole
Definition
[image]
Term
Blind hole
Definition
[image]
Term
Counter bore hole
Definition
[image]
Term
Extension Line:
Definition
extends from feature
Term
Dimension Line
Definition
indicates extent of dimension
Term
Center Lines
Definition
indicates circular symmetry
Term
Leader Line
Definition
inclined line tying note to a feature
Term
Dimensioning conventions:
Definition
- english, assume inches
- metrics, assume millimeters
- no units
Term
Principles of good dimensioning:
Definition
-include sufficient dimensions
-dimension each feature once
-dont dimension hidden lines if possible
-avoiding dimensioning inside object
-dimension holes in circular view
-dimension cylinders in rectangular view
-dimension arcs>180 diameter, arcs <180 radius
-extension lines should not touch object
-extension lines should not cross dimension lines
Term
Problem Definition Stages:
Definition
1. Problem Definition
2. Project Framework
3. Project Scheduling
4. Project Tracking and Evaluation
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