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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Engineering with computers 11 (1995), S. 157-166 
    ISSN: 1435-5663
    Keywords: Predicate ; Constraints ; Assembly ; Change propagation, Fit ; Against
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract This paper: (1) classifies design constraints of mechanical systems from a multi-disciplinary, concurrent engineering point of view from three orthogonal bases: application, object, and expression, (2) presents some initial developments in extending data models to include design constraints, formally defining entity relationships using first order predicate logic, and modeling assembly related geometry constraints for mechanical systems using predicates. Axioms and atomic formulas of mechanical assemblies are developed. Two frequently used assembly relationships-fit and against—are defined and used to explain the assembly definition axiom of a piston assembly of an engine model. Such a geometry constraint modeling method builds a basis for design change propagation and change management.
    Type of Medium: Electronic Resource
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