Lecture_14 - Kinematics and Dynamics of Machines of ENGR...

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Kinematics and Dynamics Kinematics and Dynamics of Machines of Machines ENGR 3270U ENGR 3270U Lecture 14 Lecture 14 Yuping He University of Ontario Institute of Technology November 5, 2008
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1.2 6.3 Two-Position Four-bar Linkage Design Graphical Solution Procedure (double rocker) 1) two positions of input link and output link. 2) lengths of O 2 O 4 and O 4 B are given. Design the four bar.
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1.3 Analytical Solution Procedure (double rocker)
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1.4
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1.5 Example 1: Given the ground link and output link lengthes, design a four-bar Grashof crank-rocker to give of rocker rotation with equal time forward and back, from a constant speed motor input. o 45 Two position synthesis 1) rocker output (pure rotation) 2) coupler output (complex motion)
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1.6 6.4 Motion Generation Only the path of one point and
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Unformatted text preview: the changes in the orientation of a line from the rigid body are needed to describe its motion. Supposing ABC is the coupler of a four-bar, determine the linkage. • Two Positions Constructing four-bar linkage with positions A1B1 and A2B2. 1.7 Constructing four-bar linkage with positions A1C1 and A2C2, where C1 and C2 to be determined. Locating the fixed pivot if the rigid body moves from A1B1 to A2B2 by a pure rotation about the pivot. 1.8 • Three Positions with Selected Moving Pivots Coupler’s three positions are given. Other two points on the rigid body are selected as moving pivots. 1.9 • Synthesis of a Crank with Chosen Fixed Pivots Synthesis of a crank with a selected fixed pivot. Example 2: 1.10 1.11...
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  • Spring '10
  • dinc
  • Rigid Body, Four-bar linkage, Two-Position Four-bar Linkage, Moving Pivots Coupler, double rocker

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