Conceptual Design

1. Conceptual Design Lecture #7 ME 2110: Creative Decisions and Design

2. 1) Customer Requirements 2) Specification Development 3) Conceptual Design 4) Detail Design 5) Specification of Production 6) Manufacture 7) Disposal Phases of Design ME 2110: Creative Decisions and Design

3. POLE VAULTING ME 2110: Creative Decisions and Design

4. Pole Vault Pole Functions Shoot Idiot High Into the Air (Repeatedly) Support Load Be Easy to Use Be Consistent Bend Spring Back Lightweight Fit Comfortably in Hands Be Labeled Properly Maintain Stiffness ME 2110: Creative Decisions and Design

5. Pole Vault Pole Specifications Specification For: A Pole Vault Pole Requirements Changes D/W Resp. Source D Shoot Idiot 3-6m into the air. Geometry Standard D Diameter between 1”-2” W Length between 10'-17'6" Kinematics Design W Damping ratio < 0.1 Team Forces W Bending Force Scalable Standard D Bending angle > 180 deg. USHSF Materials Standard D Moldable D Durable D Ductile W Not temperature dependent Safety D Will not fracture USHSF D 99% stiffness after 5k Bends USHSF ME 2110: Creative Decisions and Design

6. 1) Customer Requirements 2) Specification Development 3) Conceptual Design 4) Detail Design 5) Specification of Production 6) Manufacture 7) Disposal Phases of Design ME 2110: Creative Decisions and Design

7. E Eloss Shape Dough Dough Additives Shaped Dough I Dough Feed in 1 Prepare 2 Dispense 3 Shape 4 Separate 5 Feed Out 6 Shaped Dough Return 7 Additives Waste Waste Waste 1 2 3 4 5 6 1 2 3+4+5 6 7 7 1 2 3+4 5 6 1 2+3 4+5 6 7 7 Functional Decomposition: Dough Shaping at Crispy Cremes ME 2110: Creative Decisions and Design

8. Example: Design of a “Pencil” Sub-function 1: Make an Erasable Mark Sub-function 2: Erase an Erasable Mark ( C h e m i c a l ) ( E l e c t r i c a l ) ( E l e c t r i c a l ) ( E l e c t r i c a l ) C h a n g e p a p e r c o l o r B u r n p a p e r ( s p a r k ) E l e c t r i f y P a p e r ( g l o w S t a t i c c h a r g e t o h o l d m a r k ( l i k e L i t m u s p a p e r ) ( l i k e o l d f a s h i o n e d s t r i p d i s c h a r g e ) o n c h a r t r e c o r d e r s ) ( l i k e E t c h - A - S k e t c h ) F i s h e r S c i e n t i f i c T e a m # 3 T e a m # 1 E t c h - A - S k e t c h ( T h e r m a l ) ( T h e r m a l ) ( T h e r m a l ) ( M a g n e t i c ) B u r n p a p e r ( f l a m e ) H e a t p a p e r ( g l o w d i s c h a r g e ) M e l t o n M a r k A t t a c h m a g n e t i c m a t e r i a l ( l i k e r e f r i g e r a t o r m a g n e t s ) T e a m # 2 T e a m # 2 W a x s e a l s G i f t S t o r e ( B i o l o g i c a l ) ( B i o l o g i c a l ) ( O p t i c a l ) ( O p t i c a l ) G r o w b a c t e r i a , f u n g u s M o d i f y ( d i g e s t ? ) p a p e r C h a n g e l i g h t p r o p e r t i e s o f C h a n g e l i g h t ( h o l o g r a m ) p a p e r ( r e f l e c t a n c e , p o l a r i t y ) T e a m # 2 B i o T e c h M a g a z i n e T e a m # 2 T e a m # 2 ( M e c h a n i c a l ) ( M e c h a n i c a l ) ( M e c h a n i c a l ) ( C h e m i c a l ) R u b o f f M a t e r i a l T a k e o f f m a t e r i a l C o v e r m a r k C h a n g e p a p e r c o m p o s i t i o n ( l i k e w h i t e o u t ) S t a n d a r d p r o d u c t T e a m # 2 T e a m # 1 T e a m # 2 ( C h e m i c a l ) ( C h e m i c a l ) ( E l e c t r i c a l ) C h a n g e p a p e r c o l o r C h a n g e m a r k ( e . g . , b l e a c h ) B u r n o f f m a r k ( s p a r k ) ( l i k e d y i n g f a b r i c t h e s a m e E T C . c o l o r a s a s t a i n ) T e a m # 1 T e a m # 2 T e a m # 2 Solution Principle Matrix S u b - S o l u t i o n P r i n c i p l e s f u n c . ( I d e a / S o u r c e ) I d e a : ( M e c h a n i c a l ) ( M e c h a n i c a l ) ( M e c h a n i c a l ) ( C h e m i c a l ) R u b o n M a t e r i a l S q u i r t M a t e r i a l P l a c e M a t e r i a l C h a n g e p a p e r c o m p o s i t i o n 1 ( l i k e L e t t e r s e t ) S o u r c e : S t a n d a r d p r o d u c t T e a m # 2 L e t t e r s e t A c i d e t c h i n g 1 1 1 2 2 ME 2110: Creative Decisions and Design

9. Combination of Principles 1 2 Combination 1: S11 + S21 + … + Sn1 Combination 1: S11 + S22 + … + Sn2 Combining Solution Principles ME 2110: Creative Decisions and Design

10. 20 ft 12.5 ft Start Line 6.25 ft A Simple Competition ME 2110: Creative Decisions and Design

11. Place Mass on Target Generate Power Transmit Power Hit Target Brake on Target Move Mass Navigate to Target Function Tree Diagram ME 2110: Creative Decisions and Design

12. Pot. Energy Mass Liquid Res. Pot. E. m h h M, s, T v Moving Mass m Flywheel w J Wheel on incline Plane w v J Other Springs Comp. Gas Spring F F Hydraulic reservoir e.g, Piston Different Principles to Store Energy Type of Energy Mechanical Hydraulic Electrical Thermal Working Principle 1 Battery +V- 2 Flowing Liquid Heated Liquid Inductance, L 3 Superheated Steam 4 5 6 Different working principles to satisfy the function “store energy” by varying the type of energy. ME 2110: Creative Decisions and Design

13. The Morphological Chart Going from concept to physical reality Store/ Acquire Power Gravity Mouse Traps ... Transmit Power Catapult Car Hit by Trap Rip Cord Effect Ramp ... Brake on Target Anchor Rubber Stopper Rolling Friction String Break ... Move Mass Rolling Sliding Projectile Launch ... Navigate to Target Equal Size Wheels Larger Front Wheels ME 2110: Creative Decisions and Design

14. Combine Solutions from Morphological Chart Concept 1: Gravity+Ramp+Friction BrakeConcept 2: Mousetrap+Rip Cord+String BrakeConcept 3: Gravity+Mousetrap+Friction Brakeetc. ME 2110: Creative Decisions and Design

15. An Old Competition THE BIG EGG-HUNT ME 2110: Creative Decisions and Design

16. The Egg Basket Central Nest ME 2110: Creative Decisions and Design

17. Scoring A) Each rotten egg in your zone is -3 points B) Each regular egg (from the middle level of the nest)in your zone is 1 pt. C) Each Big Egg (from the top level of the nest) in your zone is 3 pts. D) All eggs in your basket are valued at 3X the above values. ME 2110: Creative Decisions and Design

18. Combination of Principles 1 2 Combination 1: S11 + S21 + … + Sn1 Combination 1: S11 + S22 + … + Sn2 Combining Solution Principles ME 2110: Creative Decisions and Design

19. First Level Evaluation Matrix + = better than datum; - = worse than datum; S = same as datum ME 2110: Creative Decisions and Design

20. First Level Evaluation Matrix Snake Voodoo Spell _ _ + S _ + + + + + _ + _ + + S _ _ _ S 1 3 3 2 1 2 2 3 3 0 0 0 Concept 1 2 3 4 5 Bunny Criteria D Cost A Safety Gathering T Ability U Robustness Ease of M Assembly + S - S s S + = better than datum; - = worse than datum; S = same as datum ME 2110: Creative Decisions and Design

21. Value Scales ME 2110: Creative Decisions and Design

22. Second Level Evaluation Matrix ME 2110: Creative Decisions and Design

23. Third Level Evaluation: Pencil Example ME 2110: Creative Decisions and Design

24. Conceptual Design 1) Formulate Many Alternate Concepts 2) Evaluate Concepts 3) Select Concepts for Further Refinement ... ME 2110: Creative Decisions and Design