Distributed-Parameter Modeling for Geometry Control of Manufacturing Processes With Material Deposition
- 9 July 1998
- journal article
- Published by ASME International in Journal of Dynamic Systems, Measurement, and Control
- Vol. 122 (1), 71-77
- https://doi.org/10.1115/1.482430
Abstract
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]Keywords
This publication has 6 references indexed in Scilit:
- Modeling and Control of Timeshared and Scanned Torch WeldingJournal of Dynamic Systems, Measurement, and Control, 1994
- Inverse Heat Transfer ProblemsInternational Series in Heat and Mass Transfer, 1994
- The Mollification Method and the Numerical Solution of Ill‐Posed ProblemsPublished by Wiley ,1993
- Economic analysis of robotic operations: A case study of a thermal spraying robotRobotics and Computer-Integrated Manufacturing, 1992
- Infinite Dimensional Linear Systems TheoryPublished by Springer Nature ,1978
- Controllability and Observability for Infinite-Dimensional SystemsSIAM Journal on Control, 1972