A U-model Enhanced PID Controller for Nonlinear Dynamic Plants

In this study U-model, a control-oriented prototype, is proposed to represent a wide range of linear and nonlinear dynamic plants. Immediately the merit of the model structure for designing PID controllers is considered in dealing with nonlinear dynamic plants. Mathematically the final solution of the controller output is converted into resolving a polynomial equation in current control term u(t - 1) which significantly reduces the difficulties encountered in nonlinear control system synthesis and computational complexities. The integrated procedure provides a straightforward methodology to use linear control system design techniques to shape up nonlinear control systems. An illustrative example is selected to demonstrate the design procedure and its effectiveness