Recent solid freeform fabrication methods generate 3D solid objects by material deposition in successive layers made of adjacent beads. Besides numerical simulation, this article introduces an analytical model of such material addition, using superposition of unit deposition distributions, composed of elementary spherical primitives consistent with the mass transfer physics. This real-time surface geometry model, with its parameters identified by in-process profile measurements, is used for Smith-prediction of the material shape in the unobservable deposition region. The model offers the basis for a distributed-parameter geometry control scheme to obtain a desired surface topology, by modulating the feed and motion of a moving mass source. The model was experimentally tested on a fused wire deposition welding station, using optical sensing by a scanning laser stripe. Its applications to other rapid prototyping methods are discussed. [S0022-0434(00)02301-7]
Distributed-Parameter Modeling for Geometry Control of Manufacturing Processes With Material Deposition
Contributed by the Dynamic Systems and Control Division for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received by the Dynamic Systems and Control Division July 9, 1998. Associate Technical Editor: T. R. Kurfess.
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Doumanidis , C., and Skordeli, E. (July 9, 1998). "Distributed-Parameter Modeling for Geometry Control of Manufacturing Processes With Material Deposition ." ASME. J. Dyn. Sys., Meas., Control. March 2000; 122(1): 71–77. https://doi.org/10.1115/1.482430
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