Abstract

This paper addresses the sliding-mode surface-based adaptive optimal nonzero-sum games control problem for continuous-time nonlinear systems with input constraints. By constructing a value function associated with the sliding-mode surface, the original nonzero-sum games problem can be transformed into constructing multiple optimal control policies. Then, an adaptive dynamic programming method under identifier-critic networks is introduced to deal with the Hamilton–Jacobi equation, where the identifier networks are applied to approximate the unknown dynamics. A remarkable feature is that the critic updating laws are designed through experience replay and gradient descent methodologies, such that the persistence of excitation condition can be excluded. Based on the Lyapunov stability theory, all signals of the close-loop system are verified to be uniformly ultimately bounded. Finally, simulation results are given to illustrate the effectiveness of the proposed optimal nonzero-sum games scheme.

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