Alarm Philosophy and Novelty Detection for the ESS Fast Beam Interlock System
(2025)Department of Automatic Control
- Abstract
- Machine Protection Systems (MPS) at the European Spallation Source (ESS) aim to protect equipment from damage while minimizing accelerator downtime with respect to safety and availability requirements. Main Control Room operators and MPS experts rely on alarm systems to effectively detect faults and guide intervention actions. Current implementations in the Fast Beam Interlock System (FBIS) are prone to cascading nuisance alarms which impede the operator’s response by causing unwanted alarms.
This report attempts to tackle the problems of nuisance alarms by developing a specific FBIS alarm philosophy. In addition to this, detection of abnormalities are not implemented in certain FBIS hardware components. Novelty detection techniques are... (More) - Machine Protection Systems (MPS) at the European Spallation Source (ESS) aim to protect equipment from damage while minimizing accelerator downtime with respect to safety and availability requirements. Main Control Room operators and MPS experts rely on alarm systems to effectively detect faults and guide intervention actions. Current implementations in the Fast Beam Interlock System (FBIS) are prone to cascading nuisance alarms which impede the operator’s response by causing unwanted alarms.
This report attempts to tackle the problems of nuisance alarms by developing a specific FBIS alarm philosophy. In addition to this, detection of abnormalities are not implemented in certain FBIS hardware components. Novelty detection techniques are therefore utilised to detect anomalies. This report limited the investigation of novelty detections schemes to the Median Absolute Deviation (MAD) and the One-Class Support Vector Machines (OCSVMs). Directed Acyclic Graphs (DAGs) were employed to model alarm propagation in the FBIS for the purpose of alarm revision.
Application of the MAD and OCSVMs to normal states of the FBIS hardware, and tuning boundary thresholds and bias respectively enabled the detection of outlier anomalies. The implementation of the FBIS alarm philosophy coupled with MAD for novelty detection showed that nuisance alarms could be significantly mitigated in the alarm service. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9208534
- author
- Utsi, Joel
- supervisor
- organization
- year
- 2025
- type
- H3 - Professional qualifications (4 Years - )
- subject
- report number
- TFRT-6288
- other publication id
- 0280-5316
- language
- English
- id
- 9208534
- date added to LUP
- 2025-08-08 15:07:13
- date last changed
- 2025-08-08 15:07:13
@misc{9208534,
abstract = {{Machine Protection Systems (MPS) at the European Spallation Source (ESS) aim to protect equipment from damage while minimizing accelerator downtime with respect to safety and availability requirements. Main Control Room operators and MPS experts rely on alarm systems to effectively detect faults and guide intervention actions. Current implementations in the Fast Beam Interlock System (FBIS) are prone to cascading nuisance alarms which impede the operator’s response by causing unwanted alarms.
This report attempts to tackle the problems of nuisance alarms by developing a specific FBIS alarm philosophy. In addition to this, detection of abnormalities are not implemented in certain FBIS hardware components. Novelty detection techniques are therefore utilised to detect anomalies. This report limited the investigation of novelty detections schemes to the Median Absolute Deviation (MAD) and the One-Class Support Vector Machines (OCSVMs). Directed Acyclic Graphs (DAGs) were employed to model alarm propagation in the FBIS for the purpose of alarm revision.
Application of the MAD and OCSVMs to normal states of the FBIS hardware, and tuning boundary thresholds and bias respectively enabled the detection of outlier anomalies. The implementation of the FBIS alarm philosophy coupled with MAD for novelty detection showed that nuisance alarms could be significantly mitigated in the alarm service.}},
author = {{Utsi, Joel}},
language = {{eng}},
note = {{Student Paper}},
title = {{Alarm Philosophy and Novelty Detection for the ESS Fast Beam Interlock System}},
year = {{2025}},
}