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Advanced Energy Vehicle (AEV). Lab 03: AEV Concept Screening and Scoring. Learning Objectives. Become familiar with techniques for design decision making Become familiar with a structured method to screen and score design concepts Observe a sample AEV operation
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Advanced Energy Vehicle (AEV) Lab 03: AEV Concept Screening and Scoring
Learning Objectives • Become familiar with techniques for design decision making • Become familiar with a structured method to screen and score design concepts • Observe a sample AEV operation • Using the sample AEV as a reference, practice concept screening and scoring methods with AEV design concepts.
Types of Decision Methods • External Decision – Customer, client, end user • Product champion – influential team member • Intuition – gut feel • Multi-voting – popular demand • Pros and cons – evaluate strengths/weaknesses • Prototype and test – trial and error • Decision matrices – selection criteria(weigh against prioritized requirements)
Two Stages to Concept Selection • Concept Screening – Screening Matrix • A quick method to down-select ideas • Use to combine various concepts or parts • Sometimes good enough for simple projects • Concept Selection – Scoring Matrix • Provides better resolution than screening • May have better definition of concepts at this point • May want to refine or create hierarchy of “Selection Criteria”
Concept Screening Matrix • Rank each design against every criteria. • Rank better, worse, or same as reference. • Tally scores to find best designs. • Combine and improve to get top several concepts. • Continue with next step.
Concept Screening Matrix Example + - 0 1 1 1 0
Concept Scoring • Define Success Criteria (rows). • Same as before but with perhaps more detail. Add hierarchical breakdown if necessary. • Weigh the importance of each criteria (0 – 100% with column adding to 100%). • Define Reference and, if necessary or desired, newly revised set of design concepts as results of 1st step. • Rate each design for each criteria (0 – 5 with 5 being the best). • Calculate ranking by adding weighted scores. • Select highest ranked design concepts.
Making the Sample AEV • Build the Sample AEV as shown in the 3D PDF (in Lab 1). MAKE SURE THE ARDUINO DOES NOT TOUCH THE METAL BRACKETS!!!!!
Classroom Track Testing Procedure • Review the AEV Classroom Track Testing Procedure.pdf in today’s in-lab activities on the EEIC courses website. • Follow today’s Concept Screening and Scoring Guidelines & program provided scenario. • Demonstrate the balance of the AEV by placing the AEV on the desktop stand. • Run the AEV statically to ensure the code is working the way the team intended. • Are the propellers spinning the correct way? • Is the AEV running the correct length of time? • Get an Instructor/TA’s approval prior to running on the test track.
Test Track Safety Procedure Entrance Gate (Station #2) North = Locations of where students should stand Start Here East Back of classroom
Preliminary Design Review (PDR) • The PDR demonstrates that the preliminary design meets all system requirements with acceptable risk and within the cost and schedule constraints and establishes the basis for proceeding with detailed design. • These first eight labs will help build a foundation in creating an energy efficient vehicle that will meet all the criteria stated in the Mission Concept Review (MCR) • PDR is due at the beginning of Lab 10B with more details of the PDR outlined in Lab 8
