Abstract
An event-triggered adaptive dynamic programming (ADP) approach is proposed for a class of non-affine continuous-time nonlinear systems with unknown internal states. A neural networks (NNs)-based observer is designed to reconstruct internal states of the system using output information, and then, by the estimation signals, an output feedback ADP control approach is developed in an event-triggered manner. The proposed approach samples the states and updates the control signal only when the triggered condition is violated, and critic NNs are designed to approximate the performance index. Compared with the traditional ADP one under a fixed sampling mechanism, the event-triggered control approach reduces the computation resource and transmission load in the learning process. The stability analysis of the closed-loop system is provided based on the Lyapunov’s theorem. Two simulation results also verify the theoretical claims.
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