Quantitative feedback theory with applications in welding
作者:
Anthony E. Bentley,
期刊:
International Journal of Robust and Nonlinear Control
(WILEY Available online 1994)
卷期:
Volume 4,
issue 1
页码: 119-160
ISSN:1049-8923
年代: 1994
DOI:10.1002/rnc.4590040109
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: Quantitative feedback theory;Arc welding;Resistance welding;Quality control
数据来源: WILEY
摘要:
AbstractTwo different control systems were developed using quantitative feedback theory for weld quality improvement. The first application to be discussed was designed for the resistancepinchwelding process and uses electrode displacement and force as feedback parameters. A correlation between weld quality and electrode displacement is established for constant electrode force. The system is capable of producing repeatable welds of consistent quality, with wide variations in weld parameters. This is the first time feedback control has been successfully applied to pinch welding. The second example presented in this paper was developed for penetration control of thegas‐tungsten‐arcwelding process. The feedback signal is obtained by measuring the amount of light emitted from the back side of the weld. Welds of constant penetration have been demonstrated in tests with travel speeds varying from 1.5 to 6 inches per minute and with 200 per cent changes in part thickn
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