P14045: Mobile Pediatric Stander - PowerPoint PPT Presentation

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P14045: Mobile Pediatric Stander

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  1. P14045: Mobile Pediatric Stander System Design Review

  2. Agenda • Introduction • Background/Problem statement • Customer Requirements • Engineering Requirements • Benchmarking Specs • Functional Decomposition • Concept Generation/Selection • System Architecture • Risk Assessment • Engineering Analysis • Test Plan Outline • Project Schedule 2 14045 Week 6 Project Presentation - 10/1/13

  3. Who’s who? Greg Roeth: Project Manager/Mechanical Engineer Alex Hebert: Lead Mechanical Engineer Emily Courtney: Mechanical Engineer Martha Vargas: Lead Electrical Engineer John Daley: Electrical Engineer 3 14045 Week 6 Project Presentation - 10/1/13

  4. Project Background Who will use our mobilized standers? • Predominantly pre-school kids with Cerebral Palsy (CP) • CP is a “non progressive brain disorder” caused by damage to a developing brain • disconnection between muscles and the brain • wide range of motor skills/control • condition typically doesn’t worsen or improve over time • Some users are on the Autism spectrum as well *taken from familymedicinehelp.com *taken from cprochester.org 4 14045 Week 6 Project Presentation - 10/1/13

  5. Project Background What is a mobile pediatric stander? • Teaching Style: - Push In vs. Pull Out • Happier Kids • Physiological and psychological benefits to standing vs. sitting 5 Snug Seat Product Guide 2013 14045 Week 6 Project Presentation - 10/1/13

  6. Project Background Problem Statement: • A motorized pediatric stander is a device similar to a wheelchair, meant to assist a disabled child to move around their environment in an upright position. The device should be able to provide safe, comfortable, and smooth transportation of the passenger, with the ability to be controlled by a third party. A previous prototype used buttons to control its movement, but the start/stop was found to be very jerky and the stander did not track straight. The remote control functionality was attempted, but was not fully implemented. Safety features were not fully developed. • The goals for this project are to modify the existing prototype to include better safety features such as collision detection and a remote control for a third party. Since there are no standing patents on automated standers key constraints are cost and weight of the components we add. 6 14045 Week 6 Project Presentation - 10/1/13

  7. Customer Requirements 7 14045 Week 6 Project Presentation - 10/1/13

  8. 8 14045 Week 6 Project Presentation - 10/1/13

  9. Benchmarking Old Systems 9 14045 Week 6 Project Presentation - 10/1/13

  10. 14045 Week 6 Project Presentation - 10/1/13 10

  11. Concept Selection • Control System Mounting • Electronics housing • Wheel System • Microprocessor • Bluetooth Module • Control Scheme 11 14045 Week 6 Project Presentation - 10/1/13

  12. http://images.worldofapple.com/ https://www.ssidisplays.com/ http://www.etac.com/ 12 14045 Week 6 Project Presentation - 10/1/13

  13. Control System Mounting 13 14045 Week 6 Project Presentation - 10/1/13

  14. Gooseneck Arm Pros: • Avoids sharp corners adjustable • Multi Size Cons: • potential break down • weight restrictions http://www.1800wheelchair.com/ 14 14045 Week 6 Project Presentation - 10/1/13

  15. Swivel Arm Pros: • Fully Adjustable Cons: • Limited Orientation • iPad only http://www.rehabmart.com/ 15 14045 Week 6 Project Presentation - 10/1/13

  16. Snug Seat Tray Pro: • wide workspace Cons: • Fixed • Doesn’t move out of the way • toucan only 16 14045 Week 6 Project Presentation - 10/1/13

  17. Concept Selection Process 17 14045 Week 6 Project Presentation - 10/1/13

  18. Final Concept • Magnetic tray • Swappable Touchpad/iPad • Collapsible 18 14045 Week 6 Project Presentation - 10/1/13

  19. Concept Selection • Control System Mounting • Electronics housing • Wheel System • Microprocessor • Bluetooth Module • Control Scheme 19 14045 Week 6 Project Presentation - 10/1/13

  20. Electronics Housing - Current Design Pros: 1) Battery is secure Cons: 1) Components and wires are exposed 2) Battery tray is rusty and sharp 3)Battery tray in way of stander angle adjustment 20 14045 Week 6 Project Presentation - 10/1/13

  21. Electronics Housing - Option 1 Pros: 1) Battery is secure, yet accessible 2) One box, One location 3) Baffles allow airflow and provide spill protection Cons: 1) Need to create mounting area 2) May interfere with folding control mount 21 14045 Week 6 Project Presentation - 10/1/13

  22. Electronics Housing - Option 2 Pros: 1) All components contained and separate 2) Utilizes available mounting space 3) Utilizes current battery tray mounting *taken from123rf.com Cons: 1) Multiple parts, multiple locations (3) *taken from tadpoleadaptive.com *taken from ozprodrivers.com.au 22 14045 Week 6 Project Presentation - 10/1/13

  23. Electronics Housing - Option 3 a. b. Pros: 1) Battery is secure, yet accessible and separate 2) One location - utilizes current tray mounting + Cons: 1) Cumbersome - may interfere with angle adjust 23 14045 Week 6 Project Presentation - 10/1/13

  24. Electronics Housing - Concept selection vs. vs. vs. vs. + 24 14045 Week 6 Project Presentation - 10/1/13

  25. Concept Selection • Control System Mounting • Electronics housing • Wheel System • Microprocessor • Bluetooth Module • Control Scheme 25 14045 Week 6 Project Presentation - 10/1/13

  26. Wheel System Current Design: Pros: • Already implemented on stander. • Integrates well with parallax motor bearing block. Cons: • Stander had to be roughly modified for assembly. • Assembly and stander adaptation is difficult. We would like to implement a solution that integrates with the stander and the motor mounts in an easier way. 26 14045 Week 6 Project Presentation - 10/1/13

  27. New Wheel Mount Concepts Concept 1: New Bracket Pros: • More easily attaches to stander • Doesn’t require modification to stander parts Cons • Potentially difficult to manufacture 27 14045 Week 6 Project Presentation - 10/1/13

  28. New Wheel Mount Concepts Concept 2: New Adapter Pros: • More easily attaches to stander • Doesn’t require modification to stander parts • Utilizes existing adapter block Cons: • Potential difficulty of assembly. 14045 Week 6 Project Presentation - 10/1/13 28

  29. New Wheel Mount Concepts 29 14045 Week 6 Project Presentation - 10/1/13

  30. New Wheel Mount Concepts • From the preliminary Pugh charts, it seems like the new adapter is the way to go. • Still to-do • Measure existing stander mounts • Perform preliminary engineering analysis on current designs. 30 14045 Week 6 Project Presentation - 10/1/13

  31. Concept Selection • Control System Mounting • Electronics housing • Wheel System • Microprocessor • Bluetooth Module • Control Scheme 31 14045 Week 6 Project Presentation - 10/1/13

  32. Microprocessor Last Year’s Group: Stellaris • Fully developed Board, lots of unnecessary additions • Used Ti’s Code Composer • Expensive, mitigated by the MCU contest (now finished) Contenders Launchpad - Stellaris or MSP430 • TI products - similar to last years group • Cheap • Lots of add-ons, lots of support Arduino • Lots of add-ons • Extensive libraries, easy to use Raspberry Pi • single board computer (overkill) • Linux environment STM32 F3 • ARM processor similar to last years *image from mouser.com 32 14045 Week 6 Project Presentation - 10/1/13

  33. Microprocessor 33 *images from wiki.ti.com, en.wikipedia.org, jaunty-electronics.com, bit-tech.net 14045 Week 6 Project Presentation - 10/1/13

  34. Concept Selection • Control System Mounting • Electronics housing • Wheel System • Microprocessor • Bluetooth Module • Control Scheme 34 14045 Week 6 Project Presentation - 10/1/13

  35. Bluetooth Module 35 Images from robotshop.com,, processors.wiki.ti.com/, bluegiga.com,, and sparkfun.com, 14045 Week 6 Project Presentation - 10/1/13

  36. Concept Selection • Control System Mounting • Electronics housing • Wheel System • Microprocessor • Bluetooth Module • Control Scheme 36 14045 Week 6 Project Presentation - 10/1/13

  37. Control Scheme - Pugh Concept Selection Decision Matrix Cited Sources: Imageshttp://www.etac.com/upload/NL-Etac/E800/Wheelchair-accessories-R-NET-Controller-Joystick-36-0.jpg http://img.diytrade.com/cdimg/1460607/22277139/0/1309847401/Programmable_Control_System_Wireless_Touch_Screen.jpg https://www.ssidisplays.com/sites/default/files/img_2352.jpg http://images.worldofapple.com/ http://i01.i.aliimg.com/wsphoto/v0/1246873025_1/6-pcs-of-60mm-lighted-font-b-button-b-font-font-b-Illuminated-b-font-round.jpg 37 14045 Week 6 Project Presentation - 10/1/13

  38. Remote Control • Custom design based on P13045. • Reduce size and adapt ergonomically to user. • Use same uController as main system. Last year’s model consisted on a TI Stellaris Launchpad controller encased in a box with 5 buttons and two switches. 38 14045 Week 6 Project Presentation - 10/1/13

  39. Concept Selection • Control System Mounting • Electronics housing • Wheel System • Microprocessor • Bluetooth Module • Control Scheme 39 14045 Week 6 Project Presentation - 10/1/13

  40. 14045 Week 6 Project Presentation - 10/1/13 40

  41. System architecture: Level 1 41 14045 Week 6 Project Presentation - 10/1/13

  42. 42 14045 Week 6 Project Presentation - 10/1/13

  43. Risk Assessment 43 14045 Week 6 Project Presentation - 10/1/13

  44. Risk Assessment (Cont.) 44 14045 Week 6 Project Presentation - 10/1/13

  45. Risk Assessment (Cont.) 14045 Week 6 Project Presentation - 10/1/13 45

  46. Engineering Analysis 46 14045 Week 6 Project Presentation - 10/1/13

  47. Test Plan Outline 47 14045 Week 6 Project Presentation - 10/1/13

  48. Test Plan Outline 14045 Week 6 Project Presentation - 10/1/13 48

  49. Project Schedule 14045 Week 6 Project Presentation - 10/1/13 49

  50. Agenda • Introduction • Background/Problem statement • Customer Requirements • Engineering Requirements • Benchmarking Specs • Functional Decomposition • Concept Generation/Selection • System Architecture • Risk Assessment • Engineering Analysis • Test Plan Outline • Project Schedule 50 14045 Week 6 Project Presentation - 10/1/13