An Optimization Approach to Control Reconfiguration
I. K. Konstantopoulos and P. J. Antsaklis
Dynamics and Control. To appear, 1999.
Abstract -- An optimization algorithm for the problem of control reconfiguration
in response to operating condition changes or abrupt system component failures
is presented here. The algorithm utilizes a version of the
Broyden-Fletcher-Goldfarb-Shanno (BFGS) optimization method of conjugate
directions. The algorithm provides an output feedback controller that not only
stabilizes the new/impaired system, when possible, but also preserves much of
the dynamics of the original/unfailed system. The design is such that the
closed-loop system is robust with respect to inevitable uncertainties/modelling
errors on the state-space matrices of the impaired system. The algorithm is
applied to an aircraft longitudinal control system, for which two severe cases
of failure are considered, first the loss of an actuator and then the loss of
a sensor in addition to the actuator loss.
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