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Parameter scheduling in ammonium feedback control
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- Carlsson, Bengt (author)
- Uppsala universitet,Avdelningen för systemteknik,Reglerteknik
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- Åmand, Linda (author)
- Uppsala universitet,Avdelningen för systemteknik,Reglerteknik
- (creator_code:org_t)
- 2013
- 2013
- English.
- In: 11th IWA conference on Instrumentation, Control and Automation.
- Conference paper (peer-reviewed)
Abstract
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- Parameter scheduling is a method to change controller settings depending on the process state. This study investigates the feasibility for parameter scheduling in a number of ammonium feedback strategies to improve disturbance rejection during peak load events. The controllers investigated by simulation are fast ammonium control, floating ammonium control and a moving average controller. A controller similar to the floating ammonium controller is also tested in a full-scale plant. The scheduling changes the upper bound on the DO set-point or the controller gain and integral time when effluent ammonium reaches a specified level. By this scheduling strategy the average ammonium concentration is decreased by up to 9%. The moving average controller showed the most promising results, but the results depend on the dissolved oxygen half saturation constant.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Reglerteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Control Engineering (hsv//eng)
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