Abstract
An adaptive neural network controller is brought forward by t h e paper to solve trajectory tracking problems of robot ic manipulators with uncertainties. The first scheme consists of a PD feedback and a dynamic compensator which is composed by neural network controller and variable structure controller . Neutral network controller is designed to adaptive learn and compensate the unknown uncertainties, variable structure controller is designed to eliminate approach errors of neutral network . The adaptive weight learning algorithm of neural network is designed to ensure online real-time adjustment, offline learning phase is not need; G lobal asymptotic stability (GAS) of s ystem base on Lyapunov theory is analysised to ensure the convergence of the algorithm. The simulation results show that the kind of the control scheme is effective and has good robustness .
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