An active disturbances rejection controller for hysteretic systems

Byline: Zeng-Qiang Chen, Jia-Xiang Zhao, Zhu-Zhi Yuan An Active Disturbances Rejection Controller (ADRC) is presented for a class of single-input-single-output non-linear systems with a hysteresis non-linearity represented by the Preisach model. The designed ADRC controller is composed of the non-linearity tracking differentiator, the extended state observer and the non-linearity PID controller. It can estimate disturbances and compensate according to the information between the input and the output of the controlled object. Thus it automatically realises the suppression of disturbance. The simulation result indicates that the ADRC controller with a set of invariable parameters can maintain that the non-linear systems with a hysteresis non-linearity have ideal tracking effect.