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P07310: Electronic Shifted Manual Transmission. George Slack Team Guide Jason BotterillTeam Leader, Mechanical Engineer Vaibhav KothariIndustrial Engineer Richard ChengElectrical Engineer Yi-Fan ZhangMechanical/Testing Engineer. Sponsor: Polaris Industries. - PowerPoint PPT Presentation
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RIT Senior Design I, Project Review
P07310: Electronic Shifted Manual Transmission
George Slack Team Guide
Jason Botterill Team Leader, Mechanical Engineer
Vaibhav Kothari Industrial Engineer
Richard Cheng Electrical Engineer
Yi-Fan Zhang Mechanical/Testing Engineer
Sponsor: Polaris Industries
P07310: Polaris ESMT 1
RIT Senior Design I, Project Review
P07310: Project Description
Semi-automatic shifting system for the Polaris Outlaw 525 high-performance ATV.
Target market: High-performance sport ATV riders.
P07310: Polaris ESMT 2
RIT Senior Design I, Project Review
P07310: Key Specifications and Features
Specifications:Weight: < 7 lbs.
Shift Time: < .1 sec.
Cost: < $250/unit @ 5000 units built
Features:
Push-Button Shift Control
Reverse Lockout
Gear indicator
P07310: Polaris ESMT 3
RIT Senior Design I, Project Review
P07310: Control Interface Design
Upshift
Downshift
P07310: Polaris ESMT 4
RIT Senior Design I, Project Review
P07310: System Flowchart
Rider pushes shift button
System cuts ignition
System shifts transmission
System restores ignition
Rider resumes normal operation
P07310: Polaris ESMT 5
RIT Senior Design I, Project Review
P07310: Project Risk Assessment
Risk: Slow electrical design progress PLC not sufficiently specified Sensor parameters not sufficiently defined Motor control scheme not defined
Proposed Mitigation: Increased supporting professor consultation Accelerated deliverables timetable
P07310: Polaris ESMT 6
RIT Senior Design I, Project Review
P07310: Project Risk Assessment
Risk: Lack of suitable test bench design No working design has yet been produced Current designs are inherently flawed
Proposed mitigation: Consult with advising professors Propose simplified design Design/build in parallel with other systems work Backup plan: Use ATV on jack stands for systems testing
P07310: Polaris ESMT 7
RIT Senior Design I, Project Review
P07310: Project Risk Assessment
Risk: Complex mechanical system Mechanical shifting system is inherently complex
Proposed mitigation: Develop secondary plan in parallel with primary solution
P07310: Polaris ESMT 8
RIT Senior Design I, Project Review
P07310: Project Risk Assessment
Risk: Shortened design schedule ATV arrived after concept review (week 5) True concept review occurred in week 8 (3 weeks late) Detailed design phase running behind schedule
Proposed Mitigation: Accelerate deliverables timetable Increase supporting professor input to decrease
development time Reduce scope to necessary functions and features only
P07310: Polaris ESMT 9
RIT Senior Design I, Project Review
P07310: Product Development Process Phase
Phase 0: Planning
Phase 1: Transmission Concept Development
Phase 2: System Level Design
Phase 3: Detailed Design
Phase 4: Testing and RefinementMSD I MSD II
0 1 2 3 4
Current Phase of Development
Alpha Prototype
P07310: Polaris ESMT 10
RIT Senior Design I, Project Review
P07310: Current State of Design
Control interface system meets customer needs Mechanical system meets customer needs (confirmation tests pending) Electrical system is incomplete Test bench design is incomplete On target for $250 cost per unit
Current projected cost per unit: Mitigations:
Development timetables for electrical system and test bench accelerated
Cost per unit projections need to be adjusted for 5000 unit run
P07310: Polaris ESMT 11
RIT Senior Design I, Project Review
P07310: MSD II Schedule Highlights
Wk 2: Design finalized and all components on order Wk. 4: Test bench completed and instrumented Wk. 4: Prototype systems completed Wk. 6: Test bench program completed, begin ATV testing Wk. 8: Function and performance review Wk. 9: Documentation completed (Formal paper, poster, etc.) Wk. 10: Final design review
P07310: Polaris ESMT 12