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Mohieddine Jelali
Control Performance Monitoring in the Metal Industry. Part 2: Application Concept and Case Study
Keywords: Control performance monitoring, top-down/bottum-up, vibration diagnosis, metal processing, strip thickness/gauge control
Metal-processing plants usually have a large number of control loops located in different levels of hierarchy. This part II of the work presents a new systematic concept for continuous control performance assessment. It consists of two steps: first, it is decided whether a bottom-up strategy (from basic to supervisory control loops) or top-down strategy (from supervisory to basic control loops) should be followed. Then, an assessment procedure is applied combining different control performance assessment methods and metrics. The concept is demonstrated on the performance assessment of an industrial strip-thickness control in a cold-rolling tandem mill. Therefore, this case study is the first successful application of CPM methods to such a high-speed process at all. The study particularly contains a comparison of different parameterisation methods for time-delay estimation and model identification.
at – Automatisierungstechnik, Oldenbourg Wissenschaftsverlag
Print ISSN: 0178-2312
Volume: 54, 02/2006
Pages: 093 - 099