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Tolerance Synthesis Scheme



Utpal Roy, N Pramanik, Sudarsan Rachuri, Ram D. Sriram, Kevin W. Lyons


The objective of this report is to identify representations and issues for the generic assembly information model and its use in a proactive tolerance synthesis scheme. It is proposed to use the small displacement torsors (the screw parameters) as a mathematical tool for analyzing the causal relationship between variations in parts? shapes and sizes (due to the small allowances permitted by tolerance specifications), and their effects on relative positioning on adjacent parts. For a given assembly, the allowable geometric variations of assembled parts, the assembly specification and the desired functional requirements have been characterized by finite sets of equality and inequality constraints. An optimization process is then formulated to study the tolerance synthesis and analysis problems in the assembly.
NIST Interagency/Internal Report (NISTIR) - 6836
Report Number


assembly, functional representation, optimization, tolerance synthesis


Roy, U. , Pramanik, N. , Rachuri, S. , Sriram, R. and Lyons, K. (2003), Tolerance Synthesis Scheme, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed May 20, 2024)


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Created June 1, 2003, Updated November 10, 2018