Institute for Systems Research

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Author: search.filters.author.Karinthi, Raghu R.Subject: search.filters.subject.computational geometry

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    Evaluating Product Machinability for Concurrent Engineering
    (1992) Nau, D.S.; Zhang, G.M.; Gupta, Satyandra K.; Karinthi, Raghu R.; ISR
    Decisions made during the design of a machined part can significantly affect the product's cost, quality, and lead time. Thus, in order to address the goals of concurrent engineering, it is important to evaluate the machinability of the proposed design, so that the designer can change the design to improve its machinability, To determine the machinability of the part, all of the possible alternative ways to machine the part should be generated, and their machinability evaluated. This chapter describes the techniques we have developed to do this automatically.

    The information provided by these techniques will prove useful in two ways: (1) to provide information to the manufacturing engineer about alternative ways in which the part might be machined, and (2) to provide feedback to the designer identifying problems that may arise with the machining.

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    A Simple Approach to Performing Set Operations on Polyhedra
    (1991) Vanecek, G., Jr.; Nau, D.S.; Karinthi, Raghu R.; ISR
    In performing regularized set operations on two solids, the most difficult step is boundary classification, in which the boundaries of each solid are split into portions that are inside, outside, or on the surface of the other solid. In this paper, we present a method for doing boundary classification on polyhedra solid. The approach is based on recursively decomposing space based on the boundaries of the solids being classified.

    This approach has several appealing properties: it is simple to describe, efficient (tests indicate O (n log n) complexity in a variety of cases), and can handle both manifold and non-manifold 3-D solids. This approach serves as the basis for set operations in the Protosolid solid modeler.