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Proceedings Paper

Smart thermal processing of layered material structures for rapid prototyping applications
Author(s): Charalabos C. Doumanidis
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Paper Abstract

This paper focuses on the mathematical and computational aspects of the modeling and control of thermal manufacturing processes, with a dynamic and distributed-parameter nature. A generic numerical simulation model is first developed for thermal processing, with an embedded melt flow model to the conduction field description. This is linearized by small perturbations near the nominal process conditions, and yields a computationally efficient state space model with a sparse, diagonally banded structure in the system matrices. A multivariable controller with similar structure is then designed, and its independent gains are selected by optimization of the closed-loop thermal eigenvalues. This procedure can be implemented in real time by identification of the model and by adaptation of the controller parameters. This methodology is validated by computer simulation, emulating scan welding and thermal rapid prototyping applications.

Paper Details

Date Published: 6 June 1997
PDF: 11 pages
Proc. SPIE 3042, Smart Structures and Materials 1997: Smart Sensing, Processing, and Instrumentation, (6 June 1997); doi: 10.1117/12.275730
Show Author Affiliations
Charalabos C. Doumanidis, Tufts Univ. (United States)


Published in SPIE Proceedings Vol. 3042:
Smart Structures and Materials 1997: Smart Sensing, Processing, and Instrumentation
Richard O. Claus, Editor(s)

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