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Unformatted text preview: between nominal parts with two degrees of freedom each. We extend this graph to include cycles and support parts with general tolerances and three degrees of freedom, and call it the assembly graph. Positioning of Planar Parts in Toleranced Assemblies 71 Input: Assembly graph, toleranced parts models 1. Find a path in the assembly graph between Pi and Pj. 2. Iterate on the path edges e = (Pk, Pl) in order: If weight(e) = 3 then compute transformation Tkl positioning Pl relative to Pk (Section 2.2). Else if weight(e) < 3 (cycle edge) then i. Find rigid bodies X and Y from graph cycle (X contains Pk). ii. Identify parts with constrained features C1,C2,C3,C4 (as in Figure 3). iii. Compute transformations positioning parts in X relative to Pi. iv. Compute transformations positioning parts in Y relative to C2. v. Compute transformation TXY positioning Y relative to X according to constraints in C1,C2,C3,C4. vi. Continue path from the exit edge (if it exists) 3. For each u ∈ Pj a. For each variational paramet...
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This note was uploaded on 08/03/2010 for the course DD 1234 taught by Professor Zczxc during the Spring '10 term at Magnolia Bible.

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