kinkajuice human powered generator Yellow Team A | Christopher DiBiasio | Heather Doering | Keith Durand | Christine Lin | Jim Lin | Smitha Raghunathan | Etan Trangle
KEY CONSIDERATION FOR MOCKUP DESIGN • design of customer interface w/ product • ergonomic considerations • safety concerns • maximum power output • power flow and generation • testing on existing rowing machines • construction of a more accurate physical mockup of Kinkajuice kinkajuice human powered generator Yellow Team A | Christopher DiBiasio | Heather Doering | Keith Durand | Christine Lin | Jim Lin | Smitha Raghunathan | Etan Trangle
CUSTOMER INTERFACE: • creation of user ’ s manual • use in correlation with Kinkajou • encourage proper techniques & usage patterns to increase life of product and keep users healthy • common injury – tendonitis in lower arms due to overuse • Encourage rotation of users kinkajuice human powered generator Yellow Team A | Christopher DiBiasio | Heather Doering | Keith Durand | Christine Lin | Jim Lin | Smitha Raghunathan | Etan Trangle
ERGONOMIC CONSIDERATIONS: • dropping H pullcord severely reduces power output • reducing H seat – H feet does not cause significant decrease in power output • reduces comfort • important to consider for long-term consumer health Δ H H pull cord H seat kinkajuice H feet human powered generator Yellow Team A | Christopher DiBiasio | Heather Doering | Keith Durand | Christine Lin | Jim Lin | Smitha Raghunathan | Etan Trangle
ERGONOMIC CONSIDERATIONS: Power Variation Due to Varying ∆ H (heels to cord origin) 60 Power goal = 60 W 50 18 minute charge Power Output (Watts) 10:1 use:charge ratio 40 30 ∆ H = 20" ∆ H = 10" 20 10 0 1 2 3 4 5 6 7 8 9 10 kinkajuice Subject human powered generator Yellow Team A | Christopher DiBiasio | Heather Doering | Keith Durand | Christine Lin | Jim Lin | Smitha Raghunathan | Etan Trangle
POWER FLOW AND GENERATION: ¼ HP Motor Linear to Rotary Motion Converter Boost Converter 12 V DC 2 A . h kinkajuice Lead-Acid Battery human powered generator Yellow Team A | Christopher DiBiasio | Heather Doering | Keith Durand | Christine Lin | Jim Lin | Smitha Raghunathan | Etan Trangle
POWER FLOW AND GENERATION: = Motor Constants depend on coil T K i geometry and magnets. m By regulating current, we can V = ω control input force. If voltage is K e controlled we can regulate the speed of the user ’ s motion Regulation of Voltage/Current is handled by Boost Converter Boost Converter Schematic kinkajuice human powered generator Yellow Team A | Christopher DiBiasio | Heather Doering | Keith Durand | Christine Lin | Jim Lin | Smitha Raghunathan | Etan Trangle
PHYSICAL MODEL OF KINKAJUICE 2.0 PROTOTYPE: • Kinkajuice 2.0 • more realistic feel • balance and friction concerns addressed • ergonomics addressed • Kinkajuice 3.0 • body re-design for: • improved balance & optimization of foot and pull cord height • cost reduction • environmental longevity kinkajuice human powered generator Yellow Team A | Christopher DiBiasio | Heather Doering | Keith Durand | Christine Lin | Jim Lin | Smitha Raghunathan | Etan Trangle
kinkajuice human powered generator Yellow Team A | Christopher DiBiasio | Heather Doering | Keith Durand | Christine Lin | Jim Lin | Smitha Raghunathan | Etan Trangle
POWER FLOW AND GENERATION: Average Watts Height Sex P1 33.53 5' 0" F Power output over 10 minute rowing period Associated Learning with Kinkajuice Use P2 62.2 5' 10" M 140 70 P3 73.05 5' 9" M P4 94.1 6' 3" M 120 60 P5 86.8 5' 9" M 100 50 Power Output (Watts) Watt Output Person 1 80 40 Person 2 Person 3 Person 1 Person 4 60 person 5 30 40 20 Power goal = 60 W 20 10 18 minute charge 0 0 10:1 use:charge ratio 0 100 200 300 400 500 600 700 0 100 200 300 400 500 600 700 Time (seconds) Time (sec) kinkajuice human powered generator Yellow Team A | Christopher DiBiasio | Heather Doering | Keith Durand | Christine Lin | Jim Lin | Smitha Raghunathan | Etan Trangle
FORCE AND BALANCE CONSIDERATIONS: How far from Center of Gravity should feet be placed to ensure stability? e ∑ d = α M Wheel 2 I c F Hand + − + θ = F e F c F a cos( ) F b 0 F Feet Battery Weight Hand Feet � a − − + F e F c F a = Battery Weight Hand b cos( θ F ) b Feet F Batter F Weight y F Wheel1 kinkajuice F Wheel2 human powered generator Yellow Team A | Christopher DiBiasio | Heather Doering | Keith Durand | Christine Lin | Jim Lin | Smitha Raghunathan | Etan Trangle
POWER GENERATION MECHANICAL ELEMENTS: kinkajuice human powered generator Yellow Team A | Christopher DiBiasio | Heather Doering | Keith Durand | Christine Lin | Jim Lin | Smitha Raghunathan | Etan Trangle
COST REDUCTION CURRENT • materials for prototype cost ~$100 • labor intensive construction PROPOSED • injection molding or thermoforming • simplified housing • sheet metal vs wood/fiber board kinkajuice human powered generator Yellow Team A | Christopher DiBiasio | Heather Doering | Keith Durand | Christine Lin | Jim Lin | Smitha Raghunathan | Etan Trangle
CUSTOMER NEEDS: • Variability of users (shape, strength • Environmental Problems (resistance), size) – Dust, heat important to worry about – Large range of age groups in • 120 F baking for 1 week - test for classes Kinkajou – BUGS a consistent problem – Very robust individuals using products • Gaskets a possible solution • if group is comfortable using it, • Low Cost -- $25/unit ( A+) then we ’ re ok – $50 = B • Use on various terrain – multiple smaller motors? – Challenging – assume user can find • Simple human interface an appropriate location – Power connection – Dirt roads prevalent – hard packed – Various meters soil – User cues IMPORTANT – Friction losses • Local repair possibilities – Rails? -- $$$ – Kinkajou must last 6 months (designed – Different tire cross section for 3 years –LED lifespan – 10,000 hrs) – Testing on: • Trails, common walking paths, Fresh Pond kinkajuice – Ergonomics – comfort, user appeal human powered generator Yellow Team A | Christopher DiBiasio | Heather Doering | Keith Durand | Christine Lin | Jim Lin | Smitha Raghunathan | Etan Trangle
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