Application of Multiple Sliding Time Windows to Fault Detection Based on Interval Models
نویسندگان
چکیده
Interval models may be used in many cases to express the imprecision and the uncertainty related to complex systems. The envelopes may be used to represent the results of the simulation of these models. One of the applications of the envelopes is as reference behaviour for Fault Detection (FD) based on analytical redundancy. In this case, the properties of the envelopes (completeness, soundness) have important consequences on the results of the FD, like missed or false alarms. This paper presents the Modal Interval Simulator (MIS), which approaches the FD problem by means of errorbounded envelopes, i.e. by the simultaneous computation of an overbounded envelope and an underbounded one. Modal Interval Analysis, which provides tools to compute interval extensions of real functions with the adequate semantics, is used for computing these envelopes. The MIS system uses multiple sliding time windows for performing FD. This allows the detection of faults of different kinds avoiding (provided that some assumptions are fulfilled) false alarms.
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