NDLI: Mathematical description of AC resistance spot welding control problem and limits of its controller design

Content Provider	IEEE Xplore Digital Library
Author	Zuogong Yue Kang Zhou Lilong Cai
Copyright Year	2013
Description	Author affiliation: Dept. of Mech. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong, China (Zuogong Yue; Kang Zhou; Lilong Cai)
Abstract	Resistance spot welding (RSW) is widely used in sheet metal fabrication industries even though the medium frequency type has appeared. Since there are lots of demands to significantly improve its performances depending on better control schemes, it is valuable to answer the question: how much of the performance it might improve if more advanced control strategies could be used. In addition, various modeling work has been done in the past twenty years. However, there are few new papers showing controller design based on these models and improving its performances effectively. This paper presented the complete mathematical description of the control problem firstly and revealed the critical points in the model of the whole process which significantly affect the control strategy design. Then it explained why most feedback strategies ordinarily used lose their theoretical foundations and few existing control algorithms can be directly used for this control problem with RMS valued current as the output and input constraints. Moreover, a practical control strategy with solid theoretical support was proposed, which seems to be simple but actually with lots of complicated theoretical issues concerned and is one of the few reasonable control algorithms considering the unique properties of RSW's “single phase AC model, input constraints and nonlinearity of the output”. In the end, this paper verified the proposed scheme against the experimental results, and introduced a new interesting general control problem for later researches.
Starting Page	3461
Ending Page	3466
File Size	334908
Page Count	6
File Format	PDF
ISBN	9781479901777
ISSN	07431619
e-ISBN	9781479901784
DOI	10.1109/ACC.2013.6580366
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	American Automatic Control Council(AACC)
Subject Keyword	Mathematical model Welding Process control Estimation Resistance Integrated circuit modeling Sensors
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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