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  • 1
    Electronic Resource
    Electronic Resource
    Approximate methods for simulation and verification of numerically controlled machining programs (1989)
    Springer
    The visual computer 5 (1989), S. 329-348 
    Details
    ISSN: 1432-2315
    Keywords: Numerical control machining ; Simulation ; Verification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Algorithms for simulation and verification of Numerically Controlled (NC) machining programs are presented. Compared to NC simulation based on conventional solid modeling systems, these models are designed to give approximate results, but with a substantial decrease in computer time. The surfaces of the part are discretized into a Surface Point Set (SPS) with a point spacing dependent on cutting tool size and shape local surface curvature and the desired accuracy of the approximate simulation. The surface-surface intersection calculations of the solid modeling approach are replaced by the intersection of the surface of the tool movement envelope with straight lines emanating from the surface points. The methods are applicable to both 3 and 5 axis machining. Samples test cases are presented, and implementation and efficiency issues are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01999101
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    Paper (German National Licenses)
    Fulltext
  • 2
    facet.materialart.
    Unknown
    Application of a postulate based control theory for an artificial arm (1975)
    In:  Other Sources
    Details
    Publication Date: 2016-06-07
    Description: The biocontroller, remnant of the natural arm, and feedback elements must be considered in designing a controller for an above elbow artificial arm for amputees. This fundamental postulate is used to derive equations for developing the controller, which is shown in block diagrams.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: JPL The 2nd Conf. on Remotely Manned Systems (RMS); p 83-84
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    Computer-aided design of curved surfaces with automatic model generation (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The design and visualization of three-dimensional objects with curved surfaces have always been difficult. The paper given below describes a computer system which facilitates both the design and visualization of such surfaces. The system enhances the design of these surfaces by virtue of various interactive techniques coupled with the application of B-Spline theory. Visualization is facilitated by including a specially built model-making machine which produces three-dimensional foam models. Thus, the system permits the designer to produce an inexpensive model of the object which is suitable for evaluation and presentation.
    Keywords: COMPUTER OPERATIONS AND HARDWARE
    Type: ASME PAPER 80-DE-10 , Design Engineering Conference and Show; Mar 24, 1980 - Mar 27, 1980; Chicago, IL
    Format: text
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    NASA TECHNICAL REPORTS
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