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

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

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

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

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

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

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

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

Customer Needs George 9/30/2014

Engineering Requirements DEMO-George 9/30/2014

QFD Sarah 9/30/2014

Stander Normal Use Video https://www.youtube.com/watch?v=MFgXJqvK4ik 9/30/2014

Functional Decomposition Courtney 9/30/2014

Functional Decomposition Courtney 9/30/2014

Functional Decomposition Courtney 9/30/2014

Functional Decomposition Courtney 9/30/2014

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

Concept Generation Table 9/30/2014

Current Stander’s Straight Line Travel https://www.youtube.com/watch?v=usIq1B2pmdA 9/30/2014

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

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

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

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

Current State Collision Control 9/30/2014

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

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

Terrible Cable Management! 9/30/2014

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

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

Very User Friendly! 9/30/2014

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

Motorized Attachment Kit CANDICE 9/30/2014

Pugh Chart CHRIS 9/30/2014

System Level Proposal CHRIS 9/30/2014

System Architecture Peter 9/30/2014

Risk Assessment Sarah 9/30/2014

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

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

Stander Debouncing Issue https://www.youtube.com/watch?v=lNr7HE6Bfc8 9/30/2014

Debouncing Feasibility Demo https://www.youtube.com/watch?v=aghNoXMoG0o 9/30/2014

Test Plan GEORGE w/ demo & PETER 9/30/2014 Verify using encoder calculations Team 13045 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

Project Plan Sarah 9/30/2014

Thank You! 9/30/2014