An hybrid command governor supervisory scheme for flight control systems subject to unpredictable anomalies

In this paper, we develop a hybrid supervisory
control architecture in a real-time environment for constrained
control systems. The strategy is based on Command Governor
(CG) ideas and is tailored to jointly take into account time-
varying set-points/constraints and unpredictable anomalies in
the nominal dynamical plant behaviour. The significance of the
method mainly lies in its capability to avoid constraint violation
and loss of stability regardless of any configuration change
occurrence in the plant/constraint structure by commuting the
current CG with a new on-line computed unit. Simulations
on an High Altitude Performance Demonstrator (HAPD) un-
manned aircraft with redundancy control surfaces show the
effectiveness of the proposed strategy.