A New Tuning Approach to Second-Order Active Disturbance Rejection Control

Abstract

Active disturbance rejection control (ADRC) is a new type of control technology. It regards unknown disturbances and system’s uncertainties as total disturbance, which can be estimated and compensated in real time, so as to guarantee desired performance. Although bandwidth parameterization approach is effective, the performance may be not optimal. For getting a simple, effective and optimal parameter tuning approach, a new tuning approach based on time-multiplied absolute-value of error (ITAE) optimal index and bandwidth parameterization approach is proposed for second-order ADRC. Time domain and frequency domain responses and ITAE indexes have been compared between bandwidth parameterization approach and the approach proposed in this paper. Simulation results confirm the proposed tuning approach.