1. Team Goals for Phase 2. Functional Decomposition 3. Benchmarking - PDF document

P17046: The Overcomer – Lower Extremities Problem Definition Review Agenda 1. Team Goals for Phase 2. Functional Decomposition 3. Benchmarking 4. Morphological Chart 5. Concept Selection 6. Feasibility 7. Systems Architecture 8. Design Flowchart 9. System Designs 10. Risk Assessment 11. Phase III Schedule

Lower Bowl Receive Attach Send Hold Send Ramp Mount Move Capture Escalator Power Gravity Rail Clamps Power Chair Physical Magnets Grab Elec. Hand Crank Mech. Generator Mech. None Alignment Pins Magnetic Lift Capture Wheel Energy Friction Mech. Elec. Elec. Contain Spring Tape Physical Weld Physical Lever Magnet Battery Piston Static Power Wheel Chair Capture Outlet Attachment Aim Absorb Energy Activate Spin Points Lever Mech. Lever Mech. Spring Friction Bow Spring Mech. Spring Servo Clip Contain Elec. Conventional Alignment Pins Motor Lever Spear Chair Magnet Physical Solenoid Pneumatic Elec. Elec. Vacuum On/Off Rings Servo Magnetic Variable Gravity Screw Chair Move Wave Rivet Physical Device Move Magnet Glue Hands Orient. Magnets Aim Position Chair Lift?? Bumpers Position Device Adjust Lever Chair Movement Affect Trajectory Mech. Spring Angle Device Movement Affect Rotation Pulley Length Elec. Ramp Height Team#: P17046 Team Name: Overcomer – Lower Extremity Strength of Physical Servo Attachment Date: 04OCT16 Doc Owner: Chris Fenn Motor Roughness of Revision: 2 Friction Mount Strength

Capture to Move to Orientate Capture to Power to Aim to Mount to Adjust to Aim to Send to Move Hold to Receive Receive Send Send Attach Attach Bowl Bowl Adjust Angle Hand Clamp Spin Rail Crank Position Chair Electromagnet Power Wheelchair Position Chair Contain Adjust Length Physical Magnet Ramp L Position Device Lever & Hinge Contain Electromagnet Position Attachment Capture Wheel Energy None- Only Adjust Physical H Alignment Servo Spring move Height Grab Pins between Electromagnet Affect Trajectory Electromagnet passes Friction Friction Motor Lift Spring B umpers Battery Lever Strength Attachment Affect Rotation Attachment B umpers Power Harpoon Tape Lever Harpoon Harpoon Strength Servo Wheelchair Solenoid Servo Power Vacuum Device Weld All Dimension Magnet Piston Outlet Position Attachment Screw Device Spring Lever Gravity Spear Move Hands Spring B umpers Servo Team#: P17046 Team Name: Overcomer – Lower Extremity Harpoon Date: 04OCT16 Doc owner: Chris Fenn Revision: 2 Chair Move Universal Joint

Function Datum Concept 1 Concept 2 Concept 3 Concept 4 Concept 5 Concept 6 Concept 7 Concept 8 Concept 9 Concept 10 Capture to Move Contain Spring Vacuum Magnet Spring Magnet Servo + Lever Lever Magnet Harpoon Move to Hold Physical Chair Chair Physical Physical Chair Servo + Lever Physical Device Harpoon Orientate to Receive Position Chair Position Attachment Electromagnet Chair Position Attachment Chair Position Chair Bumper Magnet Harpoon Capture to Receive Contain Grab Lift Magnet Grab Magnet Servo + Lever Grab Magnet Harpoon Power to Send Power Wheelchair Physical Capture Wheel Energy Battery Hand Crank Battery Battery and Spring Physical Battery Spring Aim to Send Position Chair Affect Trajectory Bumper Chair Position Atachment Chair Server + Lever Chair Servo Universal Joint Scaling Factor Selection Criteria Datum Concept 1 Concept 2 Concept 3 Concept 4 Concept 5 Concept 6 Concept 7 Concept 8 Concept 9 Concept 10 - S S S + + + - + S 3 Easy to Use 1 Cheap + + - - - + + + - + 3 Manufacturable S S S S - + S + S + 1 Ball Speed - + + + + + + - + + 2 Capture Radius - - S S - S + - S S 1 Power Required + + - - - - - + - + 2 Existing Parts Used S S S S S S S + + + 3 Achievable Within Timeframe + + S S + + S + + + 3 Environment/User Safety S S + + S + + + - 2 Accuracy - - S S S S + S S - total + 3 4 1 1 3 5 4 5 4 6 total - 4 3 2 2 4 1 4 3 2 2 total S 2 2 5 6 2 3 1 1 3 1 Total Weighted Value 31 42 40 40 38 51 47 36 48 46 Concept 6 wins the Pew Concept 7 is a Values, but Concept 9 is good second Selected Concept to persure an "improvement" on option, that isnt this design so both will dependant on be moved forward magnets

Function Datum Concept 1 Concept 2 Concept 3 Concept 4 Concept 5 Concept 6 Concept 7 Concept 8 Concept 9 Concept 10 Aim to Bowl Hinge and lever Gas Motor Lever Move Chair Move Chair Servo Lever Move Chair Magnet Move Chair Send to Bowl Ramp Spring Piston Rail Gravity Rail/Magnet Rail/Lever Ramp Magnet Lever/Bumper Scaling Factor Selection Criteria Datum Concept 1 Concept 2 Concept 3 Concept 4 Concept 5 Concept 6 Concept 7 Concept 8 Concept 9 Concept 10 3 Easy To Use + + + S + + + - + S 1 Cheap + - S + + - + + - + 3 Manufacturable + S S + + S S + - S 2 Exisiting Parts - + - S S S S S S S 2 Accuracy S + + S S + + S + - 3 Achievable S S S S S S S S S S total + 3 2 2 2 3 1 2 2 1 1 total - 1 1 1 1 0 1 0 1 2 1 total S 2 3 3 3 3 4 4 3 3 4 Total Weighted Value 33 34 31 32 35 32 34 29 29 27 Concept 7 is Concept 5 an cannot be used improvement by someone on the current Selected Concept to persure with a existing profound prototype and handicap, so it is very is not feasible possible

Function Datum Concept 1 Concept 2 Concept 3 Concept 4 Concept 5 Concept 6 Concept 7 Mount to Attach Alignment Pins Magnet Magnet Clamp Clamp Spring + Clamps Clamps + Screws + pins Adjust to Attach All Dimension Adjust Height All Dimension All Dimension Adjust Height All Dimension All Dimension Scaling Factor Selection Criteria Datum Concept 1 Concept 2 Concept 3 Concept 4 Concept 5 Concept 6 Concept 7 3 Easy to Use + + + S S + - 1 Cheap S S - + + + S 3 Manufacturable S S S + + S S 2 Adjustability S S + + S + + 2 Existing Parts Used S S S S S S S 2 Design Simplicity - + - S + - - 1 Breakaway Ability S + + S S + - 3 Achievable Within Timeframe + + + + + + + total + 2 2 3 3 3 4 1 total - 0 0 1 0 0 0 1 total S 4 4 2 3 3 2 4 Total Weighted Value 38 43 40 43 43 42 33 Concept 5 is more adjustable and Concept Number 2 still scores the works as a relatively Selected Concept to persure same as Concept simple way to mount 2, so it must be the attachments taken into the next stage

Team: P17046 - Concept Analysis Engineer: Josh Closson Rev: 2 Date: 05OCT16 Concept 6/9 Magnetism Assume: Ideal Conditions  Magnetic field is facing object to be captured  Magnetic field is 100% directed towards object with no obstructions  Ball has been magnetized successfully Reasonably sized and priced (approx.. $150) electromagnet with 300lb force 𝐺 = (𝑜 ∗ 𝑗) 2 µ𝐵 ⁄ 2𝑠 2 As seen above the magnetic strength is inversely related exponentially to distance. The calculations for a 300lb (1300N) magnets strength as it relates to distance is shown below. As you can see the magnetic design is infeasible, unable to capture the 1000N projectile form our engineering requirements at our requirement of 18in. In fact at 10 in the design is only able to capture about 6N worth of force, all of this assuming ideal conditions, which are unlikely to be present. In order to use this concept we’d either need an extraordinarily large magnet and power source or severely limit the devices capture radius.

Concept 7 Spring Distance Assume Spring is Lee Spring # LHL1000B13 or similar  K=9850 N/m Force required to propel ball is 1000N (Eng. Spec) 𝐺 = 𝑙𝑒 𝐺 𝑙 = 𝑒 1000𝑂 = 𝑒 9820𝑂 𝑛 𝑒 = .102𝑛 = 4𝑗𝑜 4 in should be able to easily be worked into the design. It is important to note that due to the nature of the equation the ball will need to be in contact with the spring the entire time in order to impart a full 1000N on the design. In addition the spring in this example costs about $15, making it cost effective.

Concept 7 Possible way to Store Energy for Spring Assume Force required is 1000N (Eng. Spec.) Input Force of average seated human=130N (Canadian OSH) Patient is capable of 20% force Possible Gear Train 6 in 4 in Force In Force Out 1 in 130𝑂 ∗ .2 = 38 1000𝑂 𝑂𝑓𝑓𝑒𝑓𝑒 𝐻𝑓𝑏𝑠 𝑆𝑏𝑢𝑗𝑝 = 1 𝐵𝑐𝑝𝑤𝑓 𝐻𝑓𝑏𝑠 𝑆𝑏𝑢𝑗𝑝 = 𝑒 𝑝𝑣𝑢 = 6 4 ∗ 6 1 ∗ 6 1 = 54 1 𝑒 𝑗𝑜 Assume 1 rev/s input Time to Charge 54 1 = 𝑥 𝑏 = 60/𝑥 𝑐 𝑥 𝑐 𝑥 𝑐 = 1.11 𝑠𝑞𝑛 𝑀𝑗𝑜𝑓𝑏𝑠 𝑊𝑓𝑚𝑝𝑑𝑗𝑢𝑧 = 𝑠 ∗ 𝑥 = 6𝑗𝑜 ∗ 1.11𝑠𝑞𝑛 ∗ .10472 = .21𝑛/𝑡 4𝑗𝑜 . 21𝑗𝑜 = 19𝑡 𝑡

Flow of Energy Flow of Info Flow of Static Forces Battery (Electrical Information Source Apply Force Source) Introduced Defeat Opposing Force Gross Electrical Input Think Processes Object Moved Electrical Losses Response/Action Coupling Field Mechanical Losses Team#: P17046 Team Name: Overcomer- Lower Extremity Date: 04OCT16 Doc Owner: Chris Fenn Mechanical Sink Revision: 1