156A-Intro-Winter-2010.ppt - MAELabs UCSD

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156A-Intro-Winter-2010.ppt - MAELabs UCSD Powered By Docstoc
					MAE156A: Fundamental Principles
    of Mechanical Design I

Dr. Nathan Delson
Dr. Mostafa (Matthew) Hedayat

Combined experience from academics and industry
Lecture Overview
  Machine Shop Course Intro.
  Motivation for Interdisciplinary Design
  Robot Project
  Course Logistics
  Turntable Analysis
  Pre-quiz to assess prerequisite knowledge
  n   Also as take home assignment due at beginning of lecture
      this Thursday
  Meet you section / choose a lab partner
         Machine Shop Course
 The machine shop course provides critical skills for
fabrication, and developing Design For Manufacturability
(DFM) skills.
 Shop skills will be used for 156B prototype fabrication
 Four-week course in 156A (weeks 3-6),with option 2-week
extension in 156B
      Mechanical Design is Dominated
             by Two Factors

    The rapid pace of technology development
   in ALL areas
       w Electronics
       w Sensors
       w Motors
       w Mechanical Components
    Intense worldwide competition in most fields

\ You will continually need to learn new technology and
optimize performance
Interdisciplinary Design has Risen to the
 Forefront of Technological Breakthroughs

  Effective design of a single product often requires close
 integration of a wide range of disciplines
      w Mechanical, Optical, Fluids, Materials
      w Electronics: Microprocessor and Sensors
      w Control, Software
 n   Ink jet printing
 n   Motion based gaming (accelerometers and soon magnetics)
 n   Gene sequencing
 Interdisciplinary Design is:
 n   A required element of an Accredited ME degree
 n   A stated priority of UCSD’s Chancellor

A Mechatronic Device has
close integration of
Mechanical and

 High performance
requires consideration of
both mechanical design,
electronics, and control.

The Fastest Changing Technology
Objectives & Methods of MAE156A&B
  Provide a real world design experience in a
  supportive environment
  Learning from the iterative nature of the design
  process through two design projects
  n   7 week Robotic/Mechatronics design project
  n   15 week sponsored design project
  Self Guided Learning to develop life-long learning
156A Robot Project for Winter 2010
    Automated Cargo Handling

 Inspired by Chek Lap Kok Airport, Hong Kong. The largest
  air cargo transportation hub in the world equipped with
               an automatic handling system

The airport authorities (aka MAE156A instructors) are interested in
investing in new technologies to speed up their cargo manipulation
          and have come to UCSD for cutting edge ideas.
During Weeks 1-3 Students will work in Pairs on
    Optimizing A Turntable Cargo Platform

Performance Measurements:
• Open-loop speed from 0 to 360 degrees (different than fall quarter)

Thousands of friction drives have been built in MAE3, but it is likely none
have been optimized. It is your chance to change Design Studio history!
 During Weeks 4-7 Four-Member Teams Will Design
     and Integrate a Cargo Transfer Mechanism

 The contest details will
 be announced in week2,
 and will be similar in
 theme but different in
 significant design
 constraints than fall

                Complete Contest Rules on-line
Accelerated Life Testing (ALT) in form a shake table will be
performed before and after final test. Robust design will rewarded!
Emphasis on Analysis, Optimization, and the
             Design Process

 In the real-world trial and error is expensive
 Good engineering decisions require both:
  n   Solid theoretical analysis
  n   Good use of experimental results
 All teams will start with a working turntable
  n   Challenge is optimizing speed
 Cargo Transfer Mechanism design requires effective:
  n   Concept Generation, Project Management, and Risk Reduction
 Individual reports will require justification of design decisions
 and demonstration of how these increased robot
Areas of Optimization of Turntable?
Mechanical         Interdisciplinary
 Areas of Optimization of Turntable
Mechanical             Interdisciplinary
  Gear ratio              Control algorithm
  Friction reduction      Real-time software
  Inertia                 Sensor and motor
  Spring design          driver electronics
                Homework and Grading
 Keep copies of all assignments turned in
 n You will need results for robot project

Review on-line calendar carefully!
 n   Late assignments -20% (none accepted more than 2 business days late)
Grading guidelines will be the same for both sections
 n   Robot project grading will be split between Delson and Hedayatnia
On-time attendance to Mechatronic Workshops and Machine Shop
Course is essential, and a portion of the grade
Course packets and on-line resources will be required for assignments.
Any grade disputes should be raised within one week of posting on
In any assignment, credit to teammate and outside contributions should
be noted.
Peer Review, like in MAE3, will be implemented for the robot and
sponsored projects.
                    Schedule Overview
The 156A three projects:
•A Mechatronics Robot Project (weeks 1-7) . Meet in EBU2-311
•A four-week Machine Shop Course (weeks 3-6). Meet in EBU2-B35
•Beginning of the Sponsored Project (weeks 8-10)

  Week 0-1: Microprocessor workshop         Week 6: Slow Speed Robot Demo

  Week 1-2: Motor Driver Workshop           Week 7: Robot Contest

  Week 3: Turntable speed performance       Week 8: Robot Oral Presentations and
                                            Meet with 156B Sponsors

  Week 4: Concepts for transfer mechanism   Week 9: Problem Definition of Sponsored

  Week 5: Meet with Instructors             Week 10: Risk Reduction meetings

                                            Finals: Risk Reduction Presentation
Prerequisites and “Corequisites”

 MAE156B is meant to be taken in the quarter immediately
 following MAE156A. Accordingly, prerequisites to 156B
 should be taken before or concurrently with 156A. This
 n   MAE150 and MAE101C should be taken concurrently or prior to
 n   If a student receives a D in either of these courses, they will be given
     a pre-req. exam during the first week of 156B to see if they can
     remain in 156B.
 Want to add MAE156A? If you have pre and co requisites
 n   New section Monday 8am-10:50am (7 spots open)
 n   There may be one spot in A08 Friday 1:00p - 3:50p
Instructional Team
                     Mechatronics TAs
Engineering Staff      Omar Abolhosn
  Chris Cassidy        Tsukasa Takahashi
  David Lischer      Mechatronics Tutors
                       Ishmael Rahimian
  Tom Chalfant
                       Ritwik Ghosh
  Steve Roberts        Steven Mi
                       Yoshio Tsuruta
  Nathan Delson      Machine Shop Tutors
                       Miles Syverud
  Matthew Hedayat
                       Siobhan Williams
                       Kevin Nguyen
                       Christopher Guevara
Demo of Turntable
    Engineering Product Development Cycles
Typical Consumer Product Development Stages:
Marketing Needs
Business Justification
Program Planning (Resources, Budget, ROI, Schedule, R&R)
Concept Generation
Prototyping – Eng. Build
Test & Review
Product Builds
CPE / MoL / Servicing
Product Engineering and Design
  Rough layouts & assembly production files creation
  Mechanical invention
  Mechanical breadboard
  Engineering design for assembly
  Design for manufacturing
  Product testing and analysis including:
  n   Life cycle testing
  n   FEA
  n   Standards compliance
  Value engineering and cost optimization
  Rapid prototyping
  Preproduction prototype fabrication

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