Abstract

In order to achieve the desired weld penetration and grain structure, the weld pool shape must be controlled. In this paper, the weld pool shape is specified by the length and width of the weld pool. Its feedback is provided by a realtime vision system. Due to unavoidable variations during welding, the process uncertainty is substantial. In order to develop a robust control system, the H∞ approach is used. Simulation and experimentation showed that the performance of the developed H∞ control system is quite satisfactory.

Volume Subject Area:
Modeling, Sensing, and Control of Manufacturing Processes
Keywords:
welding, control systems, H∞ control
Topics:
Control systems, Shapes, Welding, Feedback, Robust control, Simulation, Uncertainty
This content is only available via PDF.
Copyright © 1996 by The American Society of Mechanical Engineers
You do not currently have access to this content.