The GreenWheel: The design of a self-contained bicycle electric-assist system. 2 Arthur Petron Smart Cities
Feb 24, 2016
The GreenWheel: The design of a self-contained bicycle electric-assist system.
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Arthur PetronSmart Cities
3. OriginalityeBike ComparisonContributions to Field
4. EvaluationEvaluation MethodologyExpected Outcomes
Schedule
1. PurposeProblemImportance
2. ApproachModules/PartsTechnology and Testing
Problem: Assisted biking dramatically expands the market, but current eBike systems are unintelligent, ugly, and cumbersome.
Importance: The research areas required are motor design, electrical engineering, mechanical engineering, and industrial design. It is intended that the work be published in a way that makes is a useful reference for the process of building an electromechanical system.
PurposeGeneral Information
Purpose The Problem and Importance
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ABS braking
Data logging and workout plans
Fully wireless control
Gearless drivetrain
Integrated energy storage and charger in wheel
Ratiometric torque control mode
Water-resistant
Approach featuresApproach Features
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Two main modules
Module Breakdown modules
Approach Module Breakdown Modules
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Module Breakdown modulesApproach Module Breakdown Modules
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Outer Casing
Motor
Electronics and Batteries
Module Breakdown modulesApproach Module Breakdown Modules
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Gear and Mount (15)
Enclosure (19)
Electronics and Batteries(16, 17)
Intelligent velocity matching toque assist can provide either adjustable 1x - 2x torque or full torque
Data-logging enables users to retrieve vital statistics such as calories burned or distance traveled
Safety countermeasures provide back-up circuitry in the event of hardware failure
Technology onboard intelligence
Approach Technology Onboard Intelligence
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Mechanical and Electronic devices can be tested to determine specifications and areas of improvement
User experience is determined by mass interaction with the device in order to determine flaws
The look and feel of the device (subjective artistic impression) gauged by polling, art history, etc.
Testing methodology Approach Testing Methodology
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Originality electric bikes Originality Competitive Analysis E-bikes
GreenWheel BionX Schwinn GreenLine UltraMotorFeature Cost $1,100 $1,700 $3,500 $1,300 $2,700 Battery Cycle Life 2500 800 2000 800 800
Range 15-25 miles25-30
mi 20 mi 20 miMotor Power 800W 500W 180 W 250W 500WFits any Bike Yes No No No No
Top Speed 30 mph25 mph 15 mph 20 mph
Data Logging Yes No No No NoTorque Sensing Yes No No No NoExercise Mode Yes Bo No No NoWater Proof Yes No Yes Yes YesIntegrated Battery Protection Yes No No No YesRegenerative Braking Yes No No No No
Charge Time 15 minutes30
minutes 3.5 Hours
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GreenWheel is the least expensive kit when
paired with a < $200 bicycle
Most powerful motor
Competitive cycle life and charge time
Most advanced features(ABS/data-logging/workout plan potential)
Competitive Analysis advantages
Originality Competitive Analysis GreenWheel Advantages
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As much about the innovations required to make the device as the process through which the innovations are made
Goal is to have a guide, or design reference, that can be used by others to design anything from a better toaster to a world ending robot
ContributionsOriginality Contributions to the Field
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In-field faculty and local expert consultations to determine the extent to which the goals of the work have been met
Physical evaluation similar to testing
Evaluation methodology Evaluation Methodology
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Strong Engineering
Successful Industrial Design
Useful Resource to Others
Evaluation expected outcomes Evaluation Expected Outcomes
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