Title :
Morphological control in desktop manufacturing by distributed attraction optimization methods
Author :
Doumanidis, Haris ; Skordeli, Eleni
Author_Institution :
Dept. of Mech. Eng., Tufts Univ., Medford, MA, USA
Abstract :
Rapid prototyping techniques employing thermal material deposition are intended for direct fabrication of functional metal products and tooling. This article introduces an analytical model of such material transfer processes, using superposition of unit deposition distributions, composed of elementary ellipsoid primitives. The 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 inaccessible deposition region. Thus, a distributed-parameter geometry control scheme is established to obtain a desired surface topology, by modulating the feed and motion of a moving mass source. This is based on dynamic geometry shaping by a real-time complex optimization technique, using distributed attraction of the mass source. The methodology is tested in geometric command following on a robotic fused wire deposition PAW station, using optical sensing by a scanning laser stripe
Keywords :
liquid phase deposited coatings; metallurgical industries; nonlinear control systems; predictive control; rapid prototyping (industrial); real-time systems; shape control; temperature control; Smith-prediction; desired surface topology; desktop manufacturing; distributed attraction optimization methods; distributed-parameter geometry control scheme; elementary ellipsoid primitives; functional metal products; geometric command following; in-process profile measurements; inaccessible deposition region; material transfer processes; morphological control; optical sensing; rapid prototyping techniques; real-time complex optimization technique; real-time surface geometry model; robotic fused wire deposition PAW station; scanning laser stripe; superposition; thermal material deposition; tooling; unit deposition distributions; Analytical models; Fabrication; Geometry; Inorganic materials; Manufacturing; Metal products; Prototypes; Rapid thermal processing; Shape measurement; Surface morphology;
Conference_Titel :
Decision and Control, 1999. Proceedings of the 38th IEEE Conference on
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-5250-5
DOI :
10.1109/CDC.1999.831372