In this paper, an output-feedback solution to the

infinite-horizon linear quadratic tracking (LQT) problem for

unknown discrete-time systems is proposed. An augmented

system composed of the system ...

-network approximate dynamic programming (ADP) where only one critic

neural network (NN) is employed instead of typical actor-critic structure composed of two NNs. The proposed distributed weight tuning laws for critic NNs guarantee stability in the sense...