Sensor placement for fault isolation in linear differential-algebraic systems

Authors:
Erik Frisk;Mattias Krysander;Jan slund
Affiliations:
Department of Electrical Engineering, Linköping University, SE-581 83 Linköping, Sweden;Department of Electrical Engineering, Linköping University, SE-581 83 Linköping, Sweden;Department of Electrical Engineering, Linköping University, SE-581 83 Linköping, Sweden
Venue:
Automatica (Journal of IFAC)
Year:
2009

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Abstract

An algorithm is proposed for computing which sensor additions make a diagnosis requirement specification regarding fault detectability and isolability attainable for a given linear differential-algebraic model. Restrictions on possible sensor locations can be given, and if the diagnosis specification is not attainable with any available sensor addition, the algorithm provides the solutions that maximize specification fulfillment. Previous approaches with similar objectives have been based on the model structure only. Since the proposed algorithm utilizes the analytical expressions, it can handle models where structural approaches fail.