Abstract
Among the methods that aim to detect stiction, quite a few focus on analysing the specific signal shapes that loops exhibiting stiction usually show. The idea to use cross-correlation to investigate the signal shape for control loop data has triggered quite some further research in this area. Cross-correlation-based detection is introduced and shown to robustly indicate a stiction behaviour in many typical industrial cases. The chapter then presents a theoretical explanation why cross-correlation can robustly detect more or less typical stiction patterns and also states where it should not be used. There are, however, cases where cross-correlation will give misleading results, the most important being processes that are of an integrating nature (level control). For such loops, an alternative to cross-correlation needs to be offered. Such an approach that is signal-shape based is presented afterwards. Interestingly, the same approach can also be used for self-regulating (i.e. non-integrating) loops as well.
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© 2010 Springer-Verlag London Limited
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Horch, A. (2010). Stiction Detection Based on Cross-correlation and Signal Shape. In: Jelali, M., Huang, B. (eds) Detection and Diagnosis of Stiction in Control Loops. Advances in Industrial Control. Springer, London. https://doi.org/10.1007/978-1-84882-775-2_6
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DOI: https://doi.org/10.1007/978-1-84882-775-2_6
Publisher Name: Springer, London
Print ISBN: 978-1-84882-774-5
Online ISBN: 978-1-84882-775-2
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