Title :
Robust Fault Isolation With Statistical Uncertainty in Identified Parameters
Author :
Jianfei Dong ; Verhaegen, Michel ; Gustafsson, Fredrik
Author_Institution :
Philips Res., Eindhoven, Netherlands
Abstract :
This correspondence is a companion paper to [J. Dong, M. Verhaegen, and F. Gustafsson, “Robust Fault Detection With Statistical Uncertainty in Identified Parameters,” IEEE Trans. Signal Process., vol. 60, no. 10, Oct. 2012], extending it to fault isolation. Also, here, use is made of a linear in the parameters model representation of the input-output behavior of the nominal system (i.e. fault-free). The projection of the residual onto directions only sensitive to individual faults is robustified against the stochastic errors of the estimated model parameters. The correspondence considers additive error sequences to the input and output quantities that represent failures like drift, biased, stuck, or saturated sensors/actuators.
Keywords :
failure analysis; fault diagnosis; parameter estimation; additive error sequence; biased failure; drift failure; input-output behavior; model parameter estimation; nominal system; parameter identification; parameters model representation; residual projection; robust fault isolation; saturated actuator failure; saturated sensor failure; statistical uncertainty; stochastic error; stuck failure; Actuators; Additives; Covariance matrix; Robustness; Sensors; Uncertainty; Vectors; Additive faults; closed-form solution; fault isolation; parameter uncertainty; statistical analysis;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2012.2208639
