Abstract
In this paper the problem of managing Hardware redundancy on the Attitude Heading System and the Air Data System of a small commercial aircraft is considered. The proposed approach is based on a bank of extended H∞ observers guaranteeing sensor fault detection and isolation in the presence of external disturbances and model uncertainties. Each observer is composed of an open loop nonlinear part replicating the system dynamics and a linear feedback action. Sufficient conditions for the synthesis of the feedback action are provided in terms of an LMI feasibility problem. Constraints on the position of the observer poles are added to fasten the residual generation dynamics and to avoid low damped and/or high frequency modes. Numerical simulations on the model of the AP-68 Vulcanair small commercial aircraft are presented.
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