Motor Assisted Wheelchair 2 0 Problem Definition Phase

Motor Assisted Wheelchair 2. 0 Problem Definition Phase Team P 17007 Customer: Alan Burger, a. g. burger 4@gmail. com Faculty Guide: George Slack, gbseee@rit. edu P 17007 1

Agenda 1) Project Summary 2) Project Goals and Key Deliverables 3) Team Vision for Problem Definition Phase 4) Use Case Scenarios 5) Customer Requirements 6) Engineering Requirements 7) Constraints 8) Benchmarking 9) Risk Assessment 10) Plans for Next Phase – Individual and Team P 17007 - Agenda 2

Project Summary A Motor Assisted Wheelchair (MAW) provides a user the benefits of an electric wheelchair, such as the ability to traverse inclined pathways or move at economically quick paces without losing his or her breath, while retaining the wheelchair's ability to move through doors or other corridors. A previous prototype of this device was developed by Senior Design Team 16007, which needs to cost less, weigh less, and provide greater power. The goal of this project is to analyze and modify the current prototype by identifying opportunities to make the additional device lighter, more compact, easier to operate, and more energy and cost efficient. The expected result is a functioning prototype capable of meeting all customer requirements which can then be marketed to companies and have a competitive advantage in the market. P 17007 – Project Summary 3

Project Goals and Key Deliverables • • • Reduced weight Reduced cost Universal application to different wheelchair designs Development of a more appealing control system Easily removed and stored Comfortable and safe P 17007 – Project Goals and Key Deliverables 4

Team Vision During this phase and in the future, we plan to: • Interview our customer regularly • Identifying stakeholders and recognize impacts on design • Identify customer requirements • Identify engineering requirements • Identify and implement common use scenarios into design considerations • Benchmark parameters and products to effectively compare possible design options • Identify and consider risk scenarios involving technical, resourceful, and societal risk potential P 17007 – Team Vision for Problem Definition Phase 5

Use Case Scenarios (1) P 17007 – Use Case Scenarios Pt. 1 6

Use Case Scenarios (2) P 17007 - Use Case Scenarios Pt. 2 7

Customer Requirements P 17007 – Customer Requirements 8

Engineering Requirements P 17007 – Engineering Requirements 9

Constraints Preliminary constraints include: • Obtaining and abiding by financial resources and limits • Effectively using time during the testing process - limit down time • Designing to reach portability requirements - detach and store • Reduce weight • Long lasting battery life - usable all day • Weatherproof design • Design so that the use of a wheelchair during manual operation remains a possibility - both by the user or somebody else pushing the wheelchair P 17007 - Constraints 10

Benchmarking Although there are not many similar products currently in the market, some are represented and compared below: P 17007 - Benchmarking 11

Risk Assessment Technical: Resource: • Motor lacks power • Assembly not easily transported • Electrical failure • Budget considerations • Testing time – full day of testing • Finding correct testing inclines Safety: Societal: • Emergency stop effectiveness • Safe speed limitations • Tipping when navigating inclines P 17007 – Risk Assessment • Clean power • Public interaction in crowds and on sidewalks • Cost to afford/ease of access 12

Plans for Next Phase • Regularly update Edge with all relevant information • Hold weekly meetings (at least) with customer Alan Burger • Regularly update all working documents from the problem definition phase • Customer requirements, engineering requirements, group schedule, etc. will always be adapting to changes in the design process • Research lower weight materials • Begin modeling wheelchair in CREO • Ability to test without cost (weight, size, etc. ) • Study existing wheelchair model from team P 16007 • Spend time testing first prototype • Determine the positives and negatives of the previous design P 17007 – Plans for Next Phase 13

Questions P 17007 - Questions 14