WeET5.2.pdf (1.31 MB)
Active fault tolerant control applied to REPOINT, a novel railway track switch
conference contribution
posted on 2018-09-20, 13:31 authored by Precious Kaijuka, Roger Dixon, Christopher WardRailway 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.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
10th IFAC Symposium on Safety for Technical Processes, SAFEPROCESS2018Citation
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.Publisher
Elsevier © IFAC (International Federation of Automatic Control)Version
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2018Notes
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.ISSN
2405-8963Publisher version
Language
- en