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Robust adaptive model predictive control for intelligent drinking water distribution systems

Ajibulu, Ayodeji Opeoluwa (2018)
Ph.D. thesis, University of Birmingham.

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Abstract

Large-scale complex systems have large numbers of variables, network structure of interconnected subsystems, nonlinearity, spatial distribution with several time scales in its dynamics, uncertainties and constrained. Decomposition of large-scale complex systems into smaller more manageable subsystems allowed for implementing distributed control and coordinations mechanisms.

This thesis proposed the use of distributed softly switched robustly feasible model predictive controllers (DSSRFMPC) for the control of large-scale complex systems. Each DSSRFMPC is made up of reconfigurable robustly feasible model predictive controllers (RRFMPC) to adapt to different operational states or fault scenarios of the plant. RRFMPC reconfiguration to adapt to different operational states of the plant is achieved using the soft switching method between the RRFMPC controllers.

The RRFMPC is designed by utilizing the off-line safety zones and the robustly feasible invariant sets in the state space which are established off-line using Karush Kuhn Tucker conditions. This is used to achieve robust feasibility and recursive feasibility for the RRFMPC under different operational states of the plant. The feasible adaptive cooperation among DSSRFMPC agents under different operational states are proposed.
The proposed methodology is verified by applying it to a simulated benchmark drinking water distribution systems (DWDS) water quality control.

Type of Work:Ph.D. thesis.
Supervisor(s):Zhang, Xiao-Ping and Weston, Paul
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:School of Electronic, Electrical and Systems Engineering
Additional Information:

Publications arising from thesis:

A. Ajibulu and M. Brdys, “Point-Parametric modeling for Model Predictive Control in Dynamic networks,” in Methods and Models in Automation and Robotics, Miedzyzdroje, Poland, 2015.
http://dx.doi.org/10.1109/MMAR.2015.7283863

Subjects:QA75 Electronic computers. Computer science
TD Environmental technology. Sanitary engineering
Institution:University of Birmingham
ID Code:8193
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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