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FINAL PRESENTATION Western Michigan University

FINAL PRESENTATION Western Michigan University. Advisors: Dr. Alamgir Choudhury Dr. Jorge Rodriguez 4/20/17. Introductions. Luis. Matthew. Adam. Andrew. Problem Statement Project Objectives Design & FEA Analysis Drawings Components Test Data Compared to Analysis Cost Analysis

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FINAL PRESENTATION Western Michigan University

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  1. FINAL PRESENTATION Western Michigan University Advisors: Dr. Alamgir Choudhury Dr. Jorge Rodriguez 4/20/17

  2. Introductions Luis Matthew Adam Andrew

  3. Problem Statement • Project Objectives • Design & FEA Analysis • Drawings • Components • Test Data Compared to Analysis • Cost Analysis • Lessons Learned • Conclusions

  4. Problem Statement • Reduce amount of hoses/tubes • Better weight distribution • Safety • Lower center of mass • Completely balanced bicycle • Components can’t interfere with rider

  5. Objectives • Design a safe, low-cost, and energy efficient human powered hydraulic vehicle • Develop an environmentally friendly alternative mode of transportation • Meet all criteria and rules specified by the NFPA • Compete in the national design competition • Optimize vehicle performance in all three categories of the competition

  6. Design Process

  7. Design & Analysis - Frame Load: 160 lb (rider) Load: 100 misc lbf (components) Constraints: 4 locations (dropouts) Max VM: 8446.37 psi Max disp: 0.038 in Safety Factor of 4

  8. Design & Analysis - Top bracket Load: 100 misc lbf (components) Constraints: 6 fixed edges (holes of brackets) Max VM: 175.195 psi Max disp: 0.03019 in

  9. Design & Analysis - Pump / Motor Motor Brace Max VM: 464.492 psi Max disp: 1.162*e-04 in Pump Brace Max VM: 769.223 psi Max disp: 1.470*e-04 in

  10. Design & Analysis - Hydraulic Circuit

  11. Manifold Implementation • Centralizes all flow control devices in the system • Reduces the amount of hoses and fittings, making the system more compact and lightweight

  12. Design & Analysis - Manifold

  13. Manifold Assembly

  14. Drawings - Accumulator Mount

  15. Drawings - Reservoir Brackets

  16. Drawings - Hydraulic Supports

  17. Drawings - Hub, Motor, & Pump Mounts

  18. Fabricating Drawings

  19. Hydraulic Components 1x Proportional Valve 3x Directional Valves 2x Accumulators 2x Pump/Motors

  20. Efficiency of Pump / Motor

  21. Mechanical Components Front Hub: Shimano Alfine 8 Speed, 1 to 0.527-1.615 Rear Hub: Sram I-3 3 Speed, 1 to 0.73-1.33

  22. Drivetrain

  23. Data Comparison • Testing was done on pump and motor • Verified the system by using the computer simulation to check the function of the system • Then testing the bike in all 4 modes • Direct drive, charging, discharging, and brake recharging

  24. Cost Analysis - Prototype • 266 parts • $6,812 cost worth • $1,599 labor cost • $360 assembly cost • $8,771 total cost • $618 spent by 2017 team

  25. Cost Analysis - 500 units

  26. Lessons Learned • Develop contingency plans early on • Backup suppliers • Communication among team members • Tubes instead of hoses • Protection of electrical components

  27. Results

  28. Conclusions • Design is technologically advanced and compact thanks to the manifold • Easy to fabricate custom made parts • Hydraulics and drivetrain are functional, but electronic sensors don’t work as planned • Evenly distributed weight of 224 lbs with fluid

  29. Any Questions?

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