Seminars and Events at automatic control
All seminars are held at the Department of Automatic Control, in the seminar room M 3170-73 on the third floor in the M-building, unless stated otherwise.
Master thesis presentation by Joel Utsi: Alarm Philosophy and Novelty Detection for the ESS Fast Beam Interlock System
Disputation
From:
2025-06-09 11:00
to
12:00
Place: Large Conference Room 2485-88 in the M-building, LTH
Contact: bo [dot] bernhardsson [at] control [dot] lth [dot] se
Date & Time: June 9th, 11:00-12:00
Location: Large Conference Room 2485-88 in the M-building, LTH
Author: Joel Utsi
Title: Alarm Philosophy and Novelty Detection for the ESS Fast Beam Interlock System
Supervisor: Stefano Pavinato, Richard Pates, Annika Nordt
Examiner: Bo Bernhardsson
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.
This paper investigated the application and implementation of the novelty detections schemes Median Absolute Deviation (MAD) and One-Class Support Vector Machines (OCSVMs) in the facility-wide distributed control system to detect and alarm abnormalities for hardware in the FBIS. Furthermore, this paper attempts to establish a specific alarm philosophy for the FBIS to reduce nuisance alarms through revision using Directed Acyclic Graphs (DAGs) to model alarm propagation.
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.