Operations on polytopes: application to tolerance analysis

Details Operations on polytopes: application to tolerance analysis Operations on polytopes: application to tolerance analysis

2011-06-30

arxiv.org/abs/1106.6148v1

Computer Science

Computational Geometry

6th CIRP Seminar on CAT, Enschede : Netherlands (1999)

Scientific paper

This article presents numerical methods in order to solve problems of tolerance analysis. A geometric specification, a contact specification and a functional requirement can be respectively characterized by a finite set of geometric constraints, a finite set of contact constraints and a finite set of functional constraints. Mathematically each constraint formalises a n-face (hyperplan of dimension n) of a n-polytope (1 {\leq} n {\leq} 6). Thus the relative position between two any surfaces of a mechanism can be calculated with two operations on polytopes : the Minkowski sum and the Intersection. The result is a new polytope: the calculated polytope. The inclusion of the calculated polytope inside the functional polytope indicates if the functional requirement is satisfied or not satisfied. Examples illustrate these numerical methods.

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