PSU 2011 HUMAN POWERED VEHICLE Mjolnir Tad Bamford

PSU 2011 HUMAN POWERED VEHICLE ‘Mjolnir’ Tad Bamford Ben Higgins Chris Schultz Aaron Stanton Neal Pang External/Internal Search and Concept Evaluation

Overview � External Search o Product Research o Fabrication Research � Internal Search o Brainstorming/Concept Generation � Concept Evaluation/Selection o Decision Matrix

External Search � Product Research �HPVs from previous competitions ○ Performance advantages ○ Current innovative technology ○ Documented findings �HPVs available for purchase ○ Robust manufacturing techniques ○ Conventional design/configuration �Hobbyist HPVs ○ Personal experience ○ Common failures

External Search � Fabrication Research �Frame ○ Available materials ○ Available tools/processes �Drive train ○ Advantages/disadvantages of component configuration �Controls ○ Modifiable commercial parts �Steering equipment �Wheels/Brakes

Internal Search Brainstorming �Strive for innovation ○ Energy storage device ○ Leaning Frame/dynamic camber system ○ Sectional fairing ○ Unconventional/sustainable materials � Concept Generation �Produced from PDS criteria �Judged by decision matrix

Decision Matrix Rules Weight reliability Looks Top speed Corner Comfort Safety Ease of use $ Manuf Maint Simplicity Totals importance 5 3 4 2 3 5 2 5 4 2 3 1 3 2 wheel 3 5 5 3 4 3 2 5 3 5 5 156 3 wheel rigid 3 4 4 4 3 4 3 4 4 154 3 wheel indep. steer 3 3 4 5 5 5 4 4 3 3 4 170 3 wheel integrated 3 3 3 5 4 5 5 4 3 3 3 167 Assist -1 -1 - 1 - 2 -1 -1 -2 Hub centered wheel - 1 - 1 - - - 1 -1 - -1 6 FWD - -2 -1 1 -1 -1 - - - 1 -1 -2 -2 -27 Suspension - -1 - - 2 1 1 1 -1 -1 -1 3 Fairing 1 -1 -1 1 2 - 1 1 -1 2 -1 - -1 7

Concept Generation � Based on decision matrix, concepts exhibit: �Three-wheeled “tadpole” style recumbent �No Energy storage (deemed unfeasible) �Partial fairing �Hub-centered wheels �Leaning frame/dynamic camber