For a redundant robot manipulator. the external perturbation and digital computation errors are inevitable when executing a tracking task. In this paper. a hybrid-level joint-drift-free (HL-JDF) scheme is proposed and synthesized by a novel varying-parameter recurrent neural network [called varying-parameter convergent-differential neural network (VP-CDNN)] with inherent perturbation ... https://foldlyers.shop/product-category/multi-board/