Abstract
The dynamics model of flexible smart structures contains uncertainties due to model parameter errors and reduced-order modeling of the dynamics. Therefore, the design of model-based fault diagonosis should meet the requirements that the designed FDI (Failure Detection and Isolation) method has robustness with respect to such model uncertainties. This paper proposes a robust detection algorithm which is insensitive to the truncated vibration modes. The present method uses multiple outputs of redundant sensors and suppresses errors due to the reduced-order modeling by taking linear combinations of these outputs. The capability of the robust detection algorithm is demonstrated by a numerical simulation for a smart beam.
