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The two methods are based on robust dynamic observers or filters, used as estimators, which generate the FDI residual signals.
This approach leads to dynamic observers that can achieve both good disturbance de-coupling and robustness properties with respect to linearisation error, uncertainty and measurement noise.
The proposed nonlinear dynamic observers guarantee convergence of the observer states to the original system state in a finite and in a fixed (defined a priori) time.
The second step of the scheme requires the design of output estimators (e.g., dynamic observers or Kalman filters) which are used as residual generators.
Unlike usual dynamic observers, this technique does not require a copy of the system neither any information about the inputs, hence it is able to work even in the presence of persistent disturbances and uncertain parameters.
Linear model identification (black-box modelling) and output estimation (dynamic observers and Kalman filters) integrated approaches to fault diagnosis are in particular advantageous in terms of solution complexity and performance.
Similar(52)
The essential characteristics of the dynamic observer to be qualified as an effective observer are addressed.
A mixed H2/H∞ formulation of the SFDC problem using dynamic observer is used.
The dynamic observer shows the capabilities to attenuate such low-frequency disturbances.
Three different approaches are introduced to recursively compute the dynamic observer gains at the ROM revisions.
It generalizes the existing results on the proportional observer (PO), the proportional integral observer (PIO) and the dynamic observer (DO).
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