Design and experimental evaluation of an extended data-driven PID controller

PID Control schemes have been widely used in most process control systems. However, most process systems are nonlinear, it is difficult to obtain good control performances using simple controllers with the fixed PID parameters. This paper describes a design scheme of nonlinear controllers with a local linear models structure. The linear model is designed using the data-driven(DD) approach. The DD approach is effective in describing the nonlinear components. In addition, it is easy to construct the local linear models, if the system model can be suitably designed. According to the proposed control system, the desired control performance can be obtained for nonlinear systems.