Sensor fault-tolerant control of a rail traction drive

The problem of sensor faults on an AC-drive system for an electric train is considered here. Intermittent disconnections of these sensors produce severe transient errors in the estimator for the control loop. This paper uses a bilinear model of the motors and model-based techniques to produce estima...

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Bibliographic Details
Published in:Control engineering practice 1999-02, Vol.7 (2), p.217-225
Main Authors: Bennett, S.M., Patton, R.J., Daley, S.
Format: Article
Language:English
Subjects:
bilinear systems
Fault-tolerance
induction motors
railways
sensor failures
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Summary:The problem of sensor faults on an AC-drive system for an electric train is considered here. Intermittent disconnections of these sensors produce severe transient errors in the estimator for the control loop. This paper uses a bilinear model of the motors and model-based techniques to produce estimates of control variables that are tolerant to intermittent disconnections, without degrading performance. The paper shows how such a system can be verified in hardware, on a small test-rig with a DSP used to run the fault-tolerant algorithm.
ISSN:0967-0661
1873-6939
DOI:10.1016/S0967-0661(98)00151-8