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Survey of model-based failure detection and isolation in complex plants

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1 Author(s)
Gertler, J.J. ; Sch. of Inf. Technol., George Mason Univ., Fairfax, VA, USA

Techniques to detect and isolate failures in complex technological systems, such as sensor biases, actuator malfunctions, leaks, and equipment deterioration are surveyed. The methods are based on analytical redundancy afforded by a mathematical model of the system. The main components of such techniques are residual generation using the model, signature generation by statistical testing, and signature analysis. Model-structural conditions for failure isolation are introduced together with transformation methods to implement them. Sensitivity and robustness considerations are presented, and a design framework based on model redundancy is proposed.<>

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Control Systems Magazine, IEEE  (Volume:8 ,  Issue: 6 )