Systems Level Design Review P15010: Arc Wheelchair Swing Maggie Bates, Sean Kennelly, Owen Breese,...
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Transcript of Systems Level Design Review P15010: Arc Wheelchair Swing Maggie Bates, Sean Kennelly, Owen Breese,...
Systems Level Design ReviewP15010: Arc Wheelchair Swing
Maggie Bates, Sean Kennelly, Owen Breese, Elizabeth Cutolo
Agenda• Project Background
• Project Statement• Current Market• Customer Needs/Engineering Specifications Highlights• Updates Since Project Definition Review
• Systems Design• House of Quality• Functional Decomposition
• Concept Development• Morphological Chart• Pugh Chart• Selected Concept• System Architecture• Feasibility• Risk Assessment
BACKGROUND
Problem Statement, Deliverables, Current Market, Customer Needs and Engineering Specifications
Problem Statement
Our team has been tasked with developing and implementing a mechanism that allows individuals
in wheelchairs to experience the sensory stimulation one gets from swinging without exiting
their standard or powered wheelchairs for under $2,500 by May 2015.
Primary Customer: Amanda Bement, Arc of Monroe Day Services Director
Current Market
Current Market
Customer Requirements
Customer RequirementsCustomer Rqmt. # Importance* Category Description
CR2 9 SafetyMinimizes distance of the chair off the ground during swinging for safety and size constraints.
CR3 9 SafetySupports the weight of the wheelchair and the occupant.
CR15 9 Safety Swing will remain at a safe speed throughout use.
CR7 3 VersatilityArc facilities department has the ability to transport product from indoor areas to outdoor areas using doorways that range from 32" to 36".
CR16 9 Budget Project total cost will not exceed $2,500
Engineering Requirements
Engineering Requirements
Updates Since Last Review
• Stakeholder Communication• Arc of Monroe Outreach
• Opened Dialogue with Director, Physical Therapist and Facilities
• Project Champion • Dr. Dan Phillips from Biomedical Engineering
• Customer Requirement and Engineering Specifications• Working towards solidifying with all members of the customer
team
• Higher level understanding of vestibular simulation• Safety Regulations
• What Arc will Accept as Product• What resources are available for our use• Impact on Budget
SYSTEMS DESIGNHouse of Quality, Functional Decomposition
Functional Decomposition
Functional Decomposition
House of Quality
CONCEPT DEVELOPMENT
Morphological Analysis, Pugh Chart, Selected Concepts, System Architecture, Feasibility Analysis, Risk Assessment
Morphological Analysis/Pugh Chart
Concepts
Pugh Chart
Pugh Chart
Each Concept was used as Datum. Below are the
ranking averages.
Selected Concept
System Architecture
Feasibility AnalysisPropulsion System
Equation Minimum Value Maximum Value
Mass (lbs) N/A 650 850
Mass (Newtons) 1 lb = 4.44822 Newtons 2891.3 3781.0
Velocity (m/s) N/A 0.5 1
Time (s) N/A 2 7
Acceleration (m/s^2) a=v/t 0.0714 0.5
Force Required (Newtons) F=m*a 206.5 1890.5
Force Required (lbf) 1 lb = 4.44822 Newtons 46.43 425
Feasibility AnalysisBraking System
Feasibility AnalysisSafety Considerations
• 1:16 maximum slope for ramp
• Objects may not protrude 60’’ wide space of an
accessible route
• Designers must consider optimal layout for experience
• Turning space for wheelchair shall be located
immediately adjacent to swing
Risk Analysis
Risk Analysis (Continued)
SUBSYSTEM DESIGN PREPProject Planning, Subsystem Design Focuses
Project Plan
Subsystem Design Phase Focuses
• Braking • Disc brakes
• Propulsion• Human powered
• Safety• Human powered
• Frame• Action item
Questions?