Process control of water treatment facilities using machine learning method
The water industry in Singapore is increasingly incorporating the use of Industrial Control System (ICS) which introduces cyber-physical systems (CPS) in water treatment plants. Along with the highly efficient automated processes, the connectivity of the systems instigates new means of cyber-a...
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sg-ntu-dr.10356-1582782022-06-01T08:35:18Z Process control of water treatment facilities using machine learning method Tey, Shiyang Law Wing-Keung, Adrian School of Civil and Environmental Engineering CWKLAW@ntu.edu.sg Engineering::Environmental engineering::Water treatment The water industry in Singapore is increasingly incorporating the use of Industrial Control System (ICS) which introduces cyber-physical systems (CPS) in water treatment plants. Along with the highly efficient automated processes, the connectivity of the systems instigates new means of cyber-attacks threats. For research, a Secure Water Treatment (SWaT) testbed was jointly established by Singapore’s authorities and SUTD to provide a facility to study the security of CPS. This study aims to improve and optimize previously developed anomaly detection scripts against possible attacks on the testbed. Previous studies utilized NGBoost (NGB) which is a gradient boosting model (GBM) which outputs probabilistic predictions as the main algorithm to perform anomaly detection. Probabilistic predictions were used to estimate uncertainties to aid in the judgement of a model’s prediction. XGBoost-Distritbution (XGBD) was discovered to be a more efficient gradient boosting model compared to NGBoost (NGB) while also providing probabilistic predictions. XGBD was found to perform predictions 30 times faster and train 18 times faster than NGB. However, XGBD’s overall performance on the validation set has a 10% higher RMSE and a 25% higher MAE than NGB’s overall performance on the validation set. After comparing the significant reduction of computational time and slightly inferior accuracy, it was optimistic that XGBD is a more suitable model candidate for this project’s application. To maintain the performance of models during real-time prediction, factors affecting the degradation of performance were identified. In addition, mitigation methods were proposed to continuously improve the training data and to use the improvised training data to update and retrain models. Bachelor of Engineering (Environmental Engineering) 2022-06-01T08:35:18Z 2022-06-01T08:35:18Z 2022 Final Year Project (FYP) Tey, S. (2022). Process control of water treatment facilities using machine learning method. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/158278 https://hdl.handle.net/10356/158278 en EN-19 application/pdf Nanyang Technological University |
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Engineering::Environmental engineering::Water treatment Tey, Shiyang Process control of water treatment facilities using machine learning method |
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The water industry in Singapore is increasingly incorporating the use of Industrial Control System
(ICS) which introduces cyber-physical systems (CPS) in water treatment plants. Along with the
highly efficient automated processes, the connectivity of the systems instigates new means of
cyber-attacks threats. For research, a Secure Water Treatment (SWaT) testbed was jointly
established by Singapore’s authorities and SUTD to provide a facility to study the security of
CPS. This study aims to improve and optimize previously developed anomaly detection scripts
against possible attacks on the testbed. Previous studies utilized NGBoost (NGB) which is a
gradient boosting model (GBM) which outputs probabilistic predictions as the main algorithm to
perform anomaly detection. Probabilistic predictions were used to estimate uncertainties to aid in
the judgement of a model’s prediction.
XGBoost-Distritbution (XGBD) was discovered to be a more efficient gradient boosting model
compared to NGBoost (NGB) while also providing probabilistic predictions. XGBD was found
to perform predictions 30 times faster and train 18 times faster than NGB. However, XGBD’s
overall performance on the validation set has a 10% higher RMSE and a 25% higher MAE than
NGB’s overall performance on the validation set. After comparing the significant reduction of
computational time and slightly inferior accuracy, it was optimistic that XGBD is a more suitable
model candidate for this project’s application.
To maintain the performance of models during real-time prediction, factors affecting the
degradation of performance were identified. In addition, mitigation methods were proposed to
continuously improve the training data and to use the improvised training data to update and
retrain models. |
author2 |
Law Wing-Keung, Adrian |
author_facet |
Law Wing-Keung, Adrian Tey, Shiyang |
format |
Final Year Project |
author |
Tey, Shiyang |
author_sort |
Tey, Shiyang |
title |
Process control of water treatment facilities using machine learning method |
title_short |
Process control of water treatment facilities using machine learning method |
title_full |
Process control of water treatment facilities using machine learning method |
title_fullStr |
Process control of water treatment facilities using machine learning method |
title_full_unstemmed |
Process control of water treatment facilities using machine learning method |
title_sort |
process control of water treatment facilities using machine learning method |
publisher |
Nanyang Technological University |
publishDate |
2022 |
url |
https://hdl.handle.net/10356/158278 |
_version_ |
1735491282213535744 |