An Active Disturbance Rejection Control solution for hysteresis compensation

An Active Disturbance Rejection Control (ADRC) is proposed herein whereby hysteresis with unknown characteristics is treated as disturbance and rejected. In place of the prevailing model inversion method, which requires detailed mathematical model of the hysteresis, the proposed active disturbance rejection approach offers an appealing alternative to hysteresis compensation, one that does not require a detailed model of hysteresis. The benefits include the ease of initial design and the potential for continued operation without recalibration, as compared to the existing model based methods such as model inversion. Promising results are obtained via simulation in applying the proposed method to typical hysteresis compensation problems found in a multitude of processes and applications, which imposes severe limitations on their performance. Beyond the particular solution offered here, we believe that the readers will find in this paper a new way of thinking in regards to hysteresis compensation.