162A 6 - Synthesis

162A 6 - Synthesis - 162A. Introduction to Mechanisms and...

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162A. Introduction to Mechanisms and Mechanical Systems Chapter 5: Synthesis
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Synthesis of Mechanisms s Until now, we have focused on analysis of mechanisms. This entailed analyzing a given mechanism for its motion haracteristics. characteristics. s Kinematic synthesis of mechanisms is the reverse process. Given desired motion characteristics, we create a mechanism
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Synthesis at different levels s Pick a class or type of mechanisms: Here you pick if you want to use a linkage, a gear system, a cam system or a belt- pulley system s Pick the number of links: Here you pick the number of links, the joints or pairs to achieve the desired mobility s Design/ size the mechanism: This step called the dimensional synthesis is what we cover in this class
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Multiple Mechanisms Are Possible s Multiple mechanisms can be synthesized to achieve the same desired motion characteristics
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Dimensional Synthesis s Problems of dimensional synthesis can be assigned to one of three categories b Function Generation b Path Generation b Rigid Body Guidance
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Synthesis: Function generation s Involves determining the dimensions of a mechanism so at it will that it will coordinate either linear or angular motions of two links in a desired manner s Example 1: Cam mechanism Output displacement of the follower as a function of input cam rotation
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Synthesis: Function generation (contd.) Goal: Actual: Error: s Example 2: 4-bar mechanism s θ 4 as a function of θ 2
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s Involves determining dimensions of a mechanism that will guide a point on a link along a specified path e saw the paths generated by a coupler s We saw the paths generated by a coupler
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162A 6 - Synthesis - 162A. Introduction to Mechanisms and...

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