Sensor Fault Masking of a Ship Propulsion System

N. Eva Wu, Shuda Thavamani, Youmin Zhang, Mogens Blanke

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Abstract

This paper presents the results of a study on fault-tolerant control of a ship propulsion benchmark (Izadi-Zamanabadi and Blanke, 999), which uses estimated or virtual measurements as feedback variables. The estimator operates on a self-adjustable design model so that its outputs can be made immune to the e®ects of a peci¯c set of component and sensor faults. The adequacy of sensor redundancy is measured using the control recon¯gurability (Wu, Zhou, and Salomon, 2000), and the number of sensor based measurements are increased when this level is found inadequate. As a result, sensor faults that are captured in the estimator's design model can be tolerated without the need for any recon¯guration actions. Simulations for the ship propulsion benchmark show that, with additional sensors added as described, satisfactory fault-tolerance is achieved under two additive sensor faults, an incipient fault, and a parametric fault, without having to alter the original controller in the benchmark.
Original languageEnglish
JournalControl Engineering Practice
Volume14
Issue number11
Pages (from-to)1337-1345
ISSN0967-0661
DOIs
Publication statusPublished - 2005

Keywords

  • Fault tolerant control
  • Sensor redundancys
  • Ship propulsion benchmark
  • Adaptive estimation
  • Reconfigurability

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