Performance-based data-driven model-free adaptive sliding mode control for a class of discrete-time nonlinear processes

In this paper, a new data-driven model-free adaptive sliding mode control is discussed for discrete time nonlinear processes with tracking error constraint. Furthermore, a novel transformed error method together with a new sliding mode control framework is studied to ensure the tracking error converges to a predefined region all the time. Meanwhile, the proposed controller can guarantee that the convergence rate is not smaller than a pre-assigned constant and maximum steady-state error is less than an arbitrarily small prespecified value all the time, which is more effective in the complex industrial processes. The effectiveness of the considered strategy is validated by the simulation examples. (C) 2018 Elsevier Ltd. All rights reserved.