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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/34981

Title: Active fault tolerant control applied to REPOINT, a novel railway track switch
Authors: Kaijuka, Precious
Dixon, Roger
Ward, Christopher P.
Keywords: Fault accommodation
Reconfiguration strategy
Applications and fault tolerant control
Reconfigurable control
Issue Date: 2018
Publisher: Elsevier © IFAC (International Federation of Automatic Control)
Citation: KAIJUKA, P., DIXON, R. and WARD, C.P., 2018. Active fault tolerant control applied to REPOINT, a novel railway track switch. IFAC-PapersOnLine, 51 (24), pp.529-535.
Abstract: Railway networks are fitted with switches and crossings that enable trains to move from one track to another however they present a single point of failure. Existing track switches actuation is performed in the open loop presenting a research gap where closed-loop fault tolerant control can be applied to track switch actuation in order to improve railway network performance. A new railway track switch, REPOINT has been developed at Loughborough University with a new electromechanical design that incorporates actuator redundancy to improve the reliability of track switch operation. This paper looks at the development and validation of a sensor fault detection, identfication and accomodation scheme applied to a detailed non-linear model representing the laboratory scale demonstrator of the REPOINT concept. A residual-based fault diagnosis scheme is developed from the comparison of estimates generated by a bank of observers and output measurements. In the presence of sensor faults, a reconstructed signal from the fault detection algorithm is used to replace the measured signal for feedback control and thus safe switching position control is achieved. The results demonstrate that using a reliable fault tolerant control configuration could increase the availability and reliability of the REPOINT track switch.
Description: This paper was published in the journal IFAC-PapersOnLine and the definitive published version is available at https://doi.org/10.1016/j.ifacol.2018.09.627. This paper was also presented at the 10th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes (SAFEPROCESS 2018), Warsaw, Poland, 29th-31st August 2018.
Version: Accepted for publication
DOI: 10.1016/j.ifacol.2018.09.627
URI: https://dspace.lboro.ac.uk/2134/34981
Publisher Link: https://doi.org/10.1016/j.ifacol.2018.09.627
ISSN: 2405-8963
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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