Nonlinear Controller with the Enhanced Resistance to Electromagnetic Disturbances

Algirdas Baskys

doi:10.5755/j01.eie.25.4.23963

Abstract

The controller, which provides the control system dynamics similar to PID controller, but guarantees higher resistance of the control system to electromagnetic disturbances, has been proposed. The controller is similar to Proportional Integral (PI) controller. Distinctive feature of the controller is that the impact of the proportional term on the controller output signal is proportional to the control error raised to a power. The controller investigation results and their comparison with the results obtained using popular PID and PI controllers are presented.

Highlights

The peculiarity of the controllers that are used for the control of industrial processes is that the controller often has to operate under the impact of electromagnetic disturbances (EMD)
The set point and load disturbance unit step responses and dynamic parameters of systems with plant G1(s), and plant G2(s) using the nonlinear PI (nPI), Proportional Integral (PI), and PID controllers are presented in Fig. 2 and Table II
The proposed nPI controller provides the dynamics of the control systems similar to that of the PID controller

Summary

Introduction

The peculiarity of the controllers that are used for the control of industrial processes is that the controller often has to operate under the impact of electromagnetic disturbances (EMD). The PID (Proportional-IntegralDerivative) controller is commonly employed for the control of industrial processes [1]–[5]. Control systems, based on the PID controller, are featured by good dynamics. It provides a short settling time of system response. The noise signal produced by EMD, which appears at the controller input, affects the derivative part output and disturbs the operation of the control system. The settling time of the controlled parameter using PI controller is longer than in the situation when the PID controller is employed

Methods

Results

Conclusion