Kinematics and Dynamics of Machines MECE 3380

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Kinematics and Dynamics of MachinesMECE 3380

• Bob Freeman
• 3/1/04

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ABET Syllabus

• COURSE OBJECTIVES
• Master the fundamental concepts of
• kinematic and dynamic analysis of 1-DOF planar
  mechanisms,
• kinematic synthesis of 4Bar linkages,
• and general parametric design and optimization.
• Understand that the mathematical models used for
  analysis are also used for design.
• Effective use of math and engineering software
  (e.g., MathCad and Working Model 2D) for
  analysis, simulation, and design of planar
  machines.

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Topics Subject (of 50 min. lectures)

• Design
• Fundamental concepts including joint and link
  types, mobility, classification, and equivalent
  diagrams 4 Language
• Survey of simple mechanical devices including
  gears, cams, friction drives, and differentials
  6 Comfort food
• Design theory and methodology (as applied to
  gears) 4 Key concept of unknowns vs. of
  equations
• Dimensional synthesis of planar 4Bar linkages 9
  This is where they come from.

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Topics, cont.

• Analysis
• 4R 4Bar Analysis including position, velocity,
  acceleration, and force analysis, and shaking
  force and moment balancing 5 Comfortable
  (Dynamics)
• Geometric Energy based Dynamic modeling of 1DOF
  planar machines 6 New (system level
  characterization variables, no numbers)
• DYAD based planar mechanism analysis including
  structural formulation, position, velocity,
  acceleration, and force analysis, and dynamic
  modeling 8 Modular construction of complicated
  mechanisms
• Math and Engineering Software - 0
• Web-based tutorials for
• MathCad
• Working Model 2D
• ??? MatLab and WM 3D

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Approach to Student Learning of Software

• The students must want to learn the software and
  use the tutorial materials.
• First, hook them with the utility of the software
  to solve problems and understand concepts through
  in-class demonstrations.
• Then, teach them the software in easily
  digestible bites using asynchronous tutorial
  materials that coincide with course assignments.
• After being introduced to the basics, students
  are both more likely and more able to use the
  softwares own more encyclopedic materials.

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Enabling Technology for Asynchronous Materials

• TechSmiths Camtasia Screen capture with Audio
• Easy to use
• Excellent editing features
• Reasonable file size Roughly 3MB per minute

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Lecture Summaries

• Condensed summaries of each lecture are posted on
  the course web-site with links to additional
  asynchronous tutorial material as appropriate.

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Example Homework Assignment
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Project Overview

• Student teams to propose a task that can be
  solved using a 4-Bar linkage.
• Two (or more) different kinematic solutions
  required.
• Use Mathcad to obtain analytic solutions, and
  then Working Model 2D to "virtually" verify the
  solutions.
• Perform a dynamic analysis on one of the
  solutions in one position (state) by hand and
  with Mathcad.
• Use WM2D to dynamically simulate the mechanism
  and compare link accelerations, joint reaction
  forces, and required motor torque with Mathcad
  results.
• Compare their two kinematic solutions dynamically
  using WM2D under realistic operating conditions
  for their task and select one as their "optimal"
  design based on some dynamic metric.

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Sample Project

• The example project discusses a solution to the
  general task of controlling the motion of a box
  top.
• Mathcad Script
• WM Tutorial

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CONTRIBUTION OF COURSE OUTCOMES TO DEPARTMENT
OUTCOMES

• It will be demonstrated that the student
• 1 is able to use knowledge of mathematics, basic
  sciences and engineering to analyze (identify,
  formulate, and solve) problems in mechanical
  engineering.
• 3 is able to design mechanical devices, systems
  or processes that meet given specifications.
• 5 is able to communicate ideas effectively in
  graphical, oral and in written media.
• 8 is able to use state of the art computational
  hardware and software for analysis, design and
  documentation (techniques, skills, and modern
  engineering tools necessary for engineering
  practice).
• S2 has the ability to apply advanced mathematics
  to problems involving thermal and mechanical
  systems.
• S3 has the ability to apply statistics and linear
  algebra to problems involving thermal and
  mechanical systems
• E2 has the ability to design and analyze
  components and systems for mechanical and energy
  performance.

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Questions!!!

• Keep KD as a required course?
• Replace KD with Modeling?
• Replace 2nd Chemistry / Physics Elective with
  Modeling?