Bruce Mayer, PE Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege.edu

1. Engineering 11 DefiningDesign Prob Bruce Mayer, PE Licensed Electrical & Mechanical EngineerBMayer@ChabotCollege.edu

2. Recall the Design-Process FormulatingProblem GeneratingAlternatives • What, Exactly, is a “Design Problem” ReDesignIteration AnalyzingAlternatives EvaluatingAlternatives

3. Engineering Design Problems • Engineering Designs Generally Fall into Two Broad Categories • Remedial • New Product • Remedial Problems • There is a Clearly Identified Issue with An Existing Product or System – A Solution is Needed NOW • Basically IMPROVEMENT or Trouble-Shooting • e.g., Toyota Gas Pedal Recall

4. NewProduct Design Problems • Generally a “Clean Sheet” Process • Requirements Specified Quite Broadly • Require The Maximum Application of Engineering Capability • Creativity • Quantitative & Graphical Skill • Teamwork • Application of Science & Mathematics See also: http://www.asa3.org/ASA/education/think/intro.htm

5. Remedial Types of Design Problems • New Product CURRENT ProductDoes NOT Work CURRENT ProductDoes NOT Exist Describe as“Product Deficiency” Describe as“Product Opportunity” Tightly FocusedEngineering Design Open-EndedEngineering Design

6. What is a “Product” • One Definition of a “Product” ≡ An item that is purchased & used as a UNIT • Some Examples of Products • Cell Phone • Brick • Coffee Maker • Propane Blow Torch • Oil Tanker • UV MicroScope • WhiteBoard Marker • Milling Machine • Door Stop • Peeled Potato Sorter • F22 Fighter Jet • Digital OscilloScope

7. Anatomy of a Designed Product • Component ≡ A identifiable “piece”, or SubSet of a larger System or Object • The Classes of Components that Comprise the Design of a typcial Physical (touchable) Object • Parts • A “Part” is typically a MonoLithic Object that canNOT be NonDestructively DisAssembled • SubAssembly • Comprised of “Parts”, can be DisAssembled

8. Anatomy of a Designed Product • Two Classes of Parts • Purchased, or Standard Parts • Typically SELECTED from a CATALOG • Also called “Off the Shelf” parts • Designed, or Special-Purpose Parts (a.k.a., “Piece Parts”) • Designed for a Specific-Need • Typically “Fabricated” from “BluePrint(s)” • May Become a Standard Part if it has a broad market; it then enters the “Catalog”

9. Example Standard Part(McMaster-Carr) Catalog Ordering Number

10. Anatomy of a Designed Product • Similarly Two Classes of SubAssys • Purchased, or Standard SubAssys • Typically SELECTED from a CATALOG • Also called “Off the Shelf” assemblies • Designed, or Special-Purpose SubAssy • Designed for a Specific-Need • Typically Special and/or Standard Parts “Assembled” (Put ToGether) from “BluePrint(s)” • May Become a Standard SubAssy if it has a broad market; it then enters the “Catalog”

11. Example Std SubAssy(Grainger Insdustrial) Catalog Ordering Number

12. Design (De)Composition • During the Case Study we saw how the “chunks” of the design could be broken-down or “DeComposed” in Categories • Purchased/Standard Catalog-Parts • Designed Piece-Parts • Purchased/Standard SubAssys • Designed SubAssys • ThemSelves “composed” of Standard & Designed Catalog/Piece Parts

13. The first step in Analyzing an Existing Design is the DeComposition of the “chunks” that comprise the design. Example: “Simple” Carrot Grater & Chipper Reverse Engineering

14. DeCompose Grater/Chipper Designed SubAssy Purchased SubAssy Designed PiecePart Purchased CatalogPart

15. Process/Manufacturing Plants • Engineers also Design Process & Manufacturing Plants” (Usually called “Factories”) • Plants themselves are usually not regarded as “Products”; instead they PRODUCE Products • Plants are LARGE systems that take Inputs and Add Value to Make or Produce a Product

16. Plant Examples • The inputs to Almost ALL plants • Raw or Partially Finished MATERIAL • ENERGY- typically Electrical or Thermal • Human LABOR • Examples • Pickle Factory • Main Materials: Cucumbers, Water, Salt, Spices • Automobile – Extremely Sophisticated • Gasoline Refinery – Matl is Crude Oil

17. Plant Design • Plants are almost always “Custom” • i.e.; they are “One-of-a-Kind” • Plant Design Engineers Use Slightly Different Terminology than do Product Design Engineers • Product Designers • Sub ASSEMBLIES • PARTS • Plant Designer • Sub SYSTEMS • EQUIPMENT • a.k.a. (Machine) Tools

18. PLA Plant Design by M. Quemada • PLA (Poly Lactic Acid, derived from corn) is a nano-composite biodegradable material • It is free of synthetic resin and degrades completely in the natural environment. • PLA provides similar properties to Nylon, PS, PP, & PE See also http://online.chabotcollege.edu/bmayer/ChabotEngineeringCourses/ENGR-10_Into_to_Engrng/E10_Guest_Speakers/MQuemada_Chabot_ENGR10_Fa08.ppt

19. Space Heater Decomposition

20. DeComp Diagram Utility • Understand the interaction between components • Consider standard parts versus special purpose parts (buy vs. make) • Divide the design problem into separate sub-problems; i.e., identify decisions. • Analyze the Strengths & Weaknesses of existing Designs for products or processing/manufacturing plants

21. ReDesign modifying the “form” Selection Design  choosing from existing standard parts/subassemblies Variant Designmodifying existing part or subassembly, but keeping original concept Adaptive Design adapting known solution to new task Original Design new concept, part/product never existed before Types of Engineering Design Easier Harder

22. NOT Engineering Design • Artistic Design  “Curb Appeal” • “Industrial Designers” are the “Architects” of Engineered-Product Design • Determine QUALITATIVELY the FORM (size & shape) and FEEL (color & texture) but Do NOT Apply Science & Math • Tinkering to work in the manner of a tinkerer; especially: to repair, adjust, or work with something in an unskilled or experimental manner (No Sci/Math)

23. Industrial Design  No No.s (few anyway)

24. Type of Design by Phases Formulation original design selection design adaptivedesign Concept Design variant design Configuration Design Configuration Design Parametric Design Parametric Design Parametric Design Detail Design Detail Design Detail Design Detail Design

25. Summary • Products and Process-Plants have an anatomy of components • Components include parts & subassemblies • Process-Plant components include systems and equipment • Components can be standard or special purpose • Component decomposition diagrams can be very useful • Types of design include: original, variant, selection, adaptive, redesign • Artistic-Design & Tinkering are not really Engineering design

26. All Done for Today MATHS200 Mathematical Ideas Mathematical ideas have always influenced societies, and artists are often among the first to explore and express their meanings and implications. This course presents a variety of mathematical ideas from across cultures and times, particularly those that are still useful to artists, craftspeople, architects, and designers, from the mathematics of nature to modern computers. Each class involves visual presentations and hands-on activities from the course reader/workbook for exploring mathematical ideas. Homework each week involves creating something original to demonstrate an understanding of the mathematical ideas. The textbook supplements the ideas and helps prepare for upcoming class sessions. CCAMathClass • These 3 Units of Math are Required for the BA in Industrial Design

27. Engineering 11 Appendix Bruce Mayer, PE Registered Electrical & Mechanical EngineerBMayer@ChabotCollege.edu

28. Degrees from CCA