plugin-ajohnh-ME250F10-08-gears

plugin-ajohnh-ME250F10-08-gears - 08:Gears October5,2010

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08: Gears October 5, 2010 esign + Manufacturing I Design + Manufacturing I University of Michigan ME250 | Fall 2010 John Hart johnh@umich edu ajohnh@umich.edu http://www.umich.edu/~ajohnh ©2010 A.J. Hart 1
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Announcements Teams declared tomorrow at http://goo.gl/WurF Rule clarifications to be announced tomorrow Kits distributed next Monday Safety glasses required in lab starting next Monday, no exceptions Upcoming due dates CAD1 (individual), tomorrow Oct/6 S4 (team) next Monday Oct/11 MS4 (team), next Monday Oct/11 CAD2 (team), Fri Oct/15 DR (team), Wed Oct/20 () , / HW3 (team), bike lab, Wed Oct/27 ©2010 A.J. Hart 2
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DR preview 9.30 3.30, Wed. Oct 20, in 1131 GGB 12 minutes per team, including Q&A eliverables Deliverables Final (team) strategy, with justification of selection Final (team) concept, with justification of selection Hand sketch and preliminary solid model of your concept (component level detail not needed) Physical sketch model that can be demonstrated on the arena Identification of the modules of your concept, and a FBD of each nalysis of ree important erformance aspects of your concept Analysis of three important performance aspects of your concept .ppt (slide) presentation with supporting handouts (e.g., ©2010 A.J. Hart 3 screenshots, detailed calculations)
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MS4 assignment, due MONDAY Oct/11 WRITTEN in one of your design notebooks Will be graded during discussion with GSI Selection of your team strategy justified using a comparison 1. Selection of your team strategy, justified using a comparison table (Pugh chart), with at least 3 strategies and 5 FRs Selection of your team concept justified using a comparison 2. Selection of your team concept, justified using a comparison table, with at least 3 concepts and 5 FRs 3. Sketch of your team concept, with modules clearly identified 4. List of the three things you plan to analyze for the DR. You should be able to justify why you chose these, and then you can ask for advice on how to do the analysis. ©2010 A.J. Hart 4
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Comparison table (Pugh chart) Strategies or Concepts FRs Final design ©2010 A.J. Hart 5 Slocum.
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Pugh chart Quantitatively compare designs: the simplest method is a linear weighting scheme Use FRs as evaluation parameters (i.e., how well does the concept eet the FRs?) meet the FRs?) Apply a relative weight to each evaluation parameter, if some FRs are more important than others. ick one design as a baseline (all zeros) and compare the rest (+/ Pick one design as a baseline (all zeros) and compare the rest (+/ ) Calculate the total score for each design (see example next slide) When you find the “best” design, think of how any good characteristics of the other designs can be applied to the est design to make it even better! best design to make it even better!
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This note was uploaded on 01/26/2011 for the course ME 250 taught by Professor Dutta during the Fall '07 term at University of Michigan.

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plugin-ajohnh-ME250F10-08-gears - 08:Gears October5,2010

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