DISCRETE-TIME VELOCITY-BASED MULTIPLE MODEL NETWORKS

The velocity-based local model (LM) network is a novel modelling approach that overcomes the lack of interpretability associated with the conventional LM netwo rk technique. The global dynamics of the nonlinear network are directly related to the underlying sub-model dynamics. Thus, the velocity-based network is ideally suited to the development of local controller (LC) networks. Furthermore, the local models are continuous -time, velocity-based and linear, providing continuity with established linear theory. To date, research has focused on the continuous-time version of the velocity- based network. The application of digital computer is widely popular in the field of control and, therefore, this paper develops a discrete-time velocity-based multiple model representation. A complex nonlinear process, in the form of a simulated continuous stirred tank reactor, is used to examine the modelling capabilities of the prop osed discrete-time technique. Copyright © Controlo 2002.