This paper develops a control scheme, based on the use of Long Short-Term
Memory neural network models and Nonlinear Model Predictive Control, which
guarantees recursive feasibility with slow time variant set-points and
disturbances, input and output constraints and unmeasurable state. Moreover, if
the set-point and the disturbance are asymptotically constant, robust
asymptotic stability and offset-free tracking are guaranteed. Offset-free
tracking is obtained by augmenting the model with a disturbance, to be
estimated together with the states of the Long Short-Term Memory network model
by a properly designed observer. Satisfaction of the output constraints in
presence of observer estimation error, time varying set-points and disturbances
is obtained using a constraint tightening approach.Comment: This work has been submitted to the IEEE for possible publication.
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