0. Motorized Pediatric Stander P15045
Sarah Hill
Jon Greene
Candice Matthews
Courtney Getman
Chris Wendel
Peter Sevich
George Day
Snug Seat Rabbit Product Guide 2013

1. Team Introduction 9/30/2014 Sarah Sarah Hill Co-Team Lead
Industrial and Systems Engineer
Jonathon Greene
Mechanical Engineer
Candice Matthews
Courtney Getman
Electrical Engineer
Christopher Wendel
Peter Sevich
Computer Engineer
George Day
Sarah
9/30/2014

2. Agenda 9/30/2014 Jon will redo in powerpoint Candice
Project Background
Problem Statement & Deliverables
Action Items from Week 3 review
Customer Needs
Engineering Requirement
Updated QFD
Functional Decomposition
System Level Evolution
Concept Generation Table
Pugh Chart
System Level Proposal
System Architecture
Risk Assessment
Feasibility Analysis
Test Plan
Project Plan
Jon will redo in powerpoint
Candice
9/30/2014

3. Project Background
Pediatric standers provide upright mobility for children with certain types of disabilities, allowing the user to move and interact in a way that is more natural than a standard wheelchair, while also allowing the user to bear weight on their legs; a critical part of current physical therapy practices.
The ultimate end goal of this project is to produce a safe and repeatable motorized attachment for a pre-existing pediatric stander.
Candice
9/30/2014
Snug Seat Product Guide 2013

4. Project Background Physical Therapist Primary End User Cerebral Palsy
Linda Brown
CP Rochester
Augustine Children’s Center
Physical Therapist
Pre-school Children
Cerebral Palsy (CP)
Primary End User
Brain Disorder
Motor skill loss
Cerebral Palsy
Candice
9/30/2014
CP Rochester ‘s Augustin Children’s Center

5. Project Statement & Deliverables
Problem Statement
The primary objective of this project is to deliver a working prototype that will allow the client to control the movement of the stander. Additionally, the care provider will be able to safely control the movement of the stander, and override the user input with a remote control. Finally, the project will be packaged and made available for families with a disabled young person.
Deliverables
Functional prototype
Functional wireless remote control for client safety and training
DIY kit comprised of componentry, clear assembly instructions, and support information
Sarah
9/30/2014

6. Action Items Customer Needs and Engineering Requirements do not align
VOC and VOE revised
Customer Needs and Engineering Requirements do not align
CR18 redefined and quantified
CR18 “Provide the user with a sense of freedom and independence” suggested to be too liberally worded and hard to define
Currently in progress
FDA ban
Stander availability
Available funds
Need to define which stander to begin project work on
Jon
9/30/2014

7. Stander Proposal Pros Cons Purchase New Stander Modify Blue Stander
Physical Therapy could be performed on two students at once
A student could take one stander home
No tear-down time
Previous teams “modified” past stander’s frame.
Increased contact time between P15045 and stander
Cost
Modify Blue Stander
Previous team’s documentation
Tear down required
Eliminate a useful stander
Too large for the majority of Linda’s students
Limited access to the stander during rebuild
Kitting would produce double components for frame
Modify Red Stander
Stander fits a majority of students
Unclear documentation
9/30/2014

8. Customer Needs
George
9/30/2014

9. Engineering Requirements
DEMO-George
9/30/2014

10. QFD
Sarah
9/30/2014

11. Stander Normal Use Video
9/30/2014

12. Functional Decomposition
Courtney
9/30/2014

13. Functional Decomposition
Courtney
9/30/2014

14. Functional Decomposition
Courtney
9/30/2014

15. Functional Decomposition
Courtney
9/30/2014

16. System Level Evolution
P13045
P14045
P15045
Chris
9/30/2014

17. Concept Generation Table
9/30/2014

18. Current Stander’s Straight Line Travel
9/30/2014

19. Straight Line Travel
Encoders, Tachometers, Compass, Lane Lights, Camera, Train tracks, single motor, stepper motors, omni wheels JON
9/30/2014

20. Wheel Control Swerve Steering Skid Steer
Skid Steer, swerve steering, ackerman, omni wheels, Demo-JON
9/30/2014

21. Remote Control Communications
Bluetooth, radio, wifi, IR, cord, zigbee-George
9/30/2014

22. Remote Control Development
Game controller, iClicker, Microcontroller, Universal Remote, phone app, generic bluetooth controller-Peter
9/30/2014

23. Current State Collision Control
9/30/2014

24. Collision Detection
Extend bumper, springs, piezo, improve response time, hall effect switch, pressure/force sensor, ultrasonic sensor, optic sensor, cantilever, elastimer- CANDICE
9/30/2014

25. Variable Speed Control
software, potentiometer-CHRIS
9/30/2014

26. Terrible Cable Management!
9/30/2014

27. Cable Management
Color code, heat shrink, wire ties, shorter wires, conduit, multi-conductor cabling, wireless, wire raceways: CANDICE
9/30/2014

28. Water Proofing
Enclosed electrical box, deutsch connectors, hydrophobic spray, bag, insulated wires: PETER
9/30/2014

29. Very User Friendly!
9/30/2014

30. User Friendly
low battery light, charger pouch, retractable wires, on/off light, common connectors, connector port, feedback light, color coding- User friendly:COURTNEY
9/30/2014

31. Motorized Attachment Kit
CANDICE
9/30/2014

32. Pugh Chart
CHRIS
9/30/2014

33. System Level Proposal
CHRIS
9/30/2014

34. System Architecture
Peter
9/30/2014

35. Risk Assessment
Sarah
9/30/2014

36. Feasibility Analysis Rabbit Stander: $2,070
How much would a parent be willing to spend on a DIY kit for a motorized stander?
Rabbit Stander: $2,070
Motorized Wheelchair: $4,000
Is it feasible to produce a kit for $500?
Original BOM cost : $1,600
Reduced BOM cost: $1,400
JON
18% of budget came from the tray assembly, 38% from the electronics, 26% from the wheels and 15% from the battery box
9/30/2014

37. Feasibility Analysis 3x :30 minute uses/day 58.06 Wh- stander
How much power will the stander consume?
3x :30 minute uses/day
58.06 Wh- stander
.753 Wh- remote
Is a kit assembly with 2-6 tools feasible?
Previous team: 7 Tools
Standardizing screws = 5-6 tools
Is it possible to not add more than 20 lbs of weight with the kit?
Previous team +40 lbs
Neglecting battery, +28 lbs
JON- combine budget ones,discuss cost, power and weight
Is the response time of the TI Microcontroller to Bluetooth interrupts quick enough to control the stander?
-2 ms latency from when the remote button is pressed to when the stander reacts which is below human perception
Is an Arduino Uno a faster microcontroller for controlling the stander?
-TM4C123X: CPU speed 80 MHz and SRAM:32kB and Arduino: CPU speed 16MHz and SRAM: 2 kB
-Current microcontroller is 5x faster than Arduino
Is a kit assembly with 2-6 tools feasible?
Arduino Vs. TI Microcontroller: Latency
Is bluetooth communication fast enough?
9/30/2014

38. Stander Debouncing Issue
9/30/2014

39. Debouncing Feasibility Demo
9/30/2014

40. Test Plan GEORGE w/ demo & PETER 9/30/2014
Verify using encoder calculations
Team benchmarked the speed of a brisk walk to be 3MPH
Measured using accelerometer
Acceleration and jerk can be measured from a motorized scooter
RIT engineering club & non-technical people. Verify meets engineering requirements (<8hrs)
Have volunteers assemble kit to observe time and difficulty
Compare deviation against previous stander
Have stander drive over 20ft line of straight tape to measure deviation
Verify using simulated 3-5mm/min rainfall
IP Code water protection rating for light beverage spills
Receive accurate battery life information using voltmeter
Use stander on and off for several hours to test battery power
Ensure combination produce desired results
Test all control combinations for both client and remote together
GEORGE w/ demo & PETER
9/30/2014

41. Project Plan
Sarah
9/30/2014

42. Thank You!
9/30/2014