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Data-based modelling and proportional integral plus (PIP) control of nitrate in an activated sludge benchmark

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>01/2001
<mark>Journal</mark>Water Science and Technology
Issue number1
Number of pages8
Pages (from-to)87-94
<mark>Original language</mark>English


This paper presents the result of an investigation into the Proportional Integral Plus (PIP) control of nitrate in the second zone of an activated sludge benchmark. A data-based reduced order model is used as the control model and identified using the Simplified Refined Instrumental Variable (SRIV) identification and estimation algorithm. The PIP control design is based on the Non Minimum State Space (NMSS) form and State Variable Feedback (SVF) methodology. The PIP controller is tested against dynamic load disturbances and compared with the response of a well-tuned PI controller.