Adaptive Control Design for Unknown System with Nonlinear Perturbed Dead-Zone

【摘要】：Adaptive control design is studied for a class of unknown systems with a nonlinear perturbed dead-zone input.The nonlinear dead-zone can be represented as a time-varying system with a disturbance-like term.An adaptive controller is first constructed using functions acting as the upper bounds of the nonlinear dynamics,which are independent on the dead-zone parameters.Time-varying delays are also dealt with while the construction of an inverse dead-zone model is not required.Moreover,a neural controller is further proposed using a neural network with only a scalar weight parameter,such that the requirement on the bounds functions can be relaxed.The effectiveness of the developed approaches is illustrated by simulations.