S. Domek

Model following PID control system

The paper deals with robustness to plant parameter perturbations and sensitivity to disturbances of two‐loop control structures containing a model of the controlled plant and two PID controllers. Special attention is paid to high robustness of considered structure to perturbations of the controlled plant in relation to its nominal model and to good reduction of disturbances. On the basis of presented simulation results one can compare properties of the proposed structure with properties of the Smith predictor and classic control system structure with single feedback loop. The proposed model following control structures may find wide application to robust control of parameter‐varying plants.

PID Robust Model Following Control

Abstract The paper deals with properties of a two-loop structure of PID control system containing the nominal model of controlled plant and two PID controllers. The special attention is paid to high robustness of considered control structure to the perturbations of the controlled plant in relation to its nominal model and to disturbances commonly met in industrial practice. The results of simulations confirm high robustness of the considered control structure. Owing to its advantages, the proposed structure of control may find wide application in new implementation of PID to robust control of the parameter-varying process plants.

Robust PID model following control

The paper deals with properties of the so-called model-following control systems that contain a nominal model of the controlled plant and two PID controllers. An approach to design robust controllers for a SISO process from the viewpoint of its input sensitivity is presented. The proposed structures have been tested by simulation and experiment on linear and nonlinear control plants with perturbed parameters. Results of tests lend support to the view that the proposed structure significantly extends the range of applicability, performance, and robustness of the control system, and thereby eliminates to a large extent the need to employ an adaptation mechanism. Therefore, the structure may find wide application to robust control of plants with time-varying parameters.

Robust Model Following PID Control and Its Implementation of PLC

Abstract The paper deals with properties of a two-loop model following control system (MFC) containing a nominal model of the controlled plant and two PID controllers. An approach to design of a robust PID controller for a SISO process from the viewpoint of its input sensitivity is presented. Advantages of the new structure containing the 2PID-MFC controller as compared to the classic feedback control system are pointed out. The proposed model following control structure (MFC) may find wide application in new intelligent controllers to robust control of parameter-time varying plants.

Robust Model Following Control System

Abstract The paper deals with properties of a two-loop structure of a model following PID control system containing the nominal model of controlled plant and two PID controllers. Special attention is paid to high robustness of the considered control structure to perturbations of the controlled plant and to good suppression of disturbances commonly met in industrial practice. Compared to the classic negative feedback loop, the system proposed offers a much better control quality in case of perturbed plant; in doing so both time delay and time constants and plant gain and process order may be perturbed