An Improved ADRC with RLS for Torque Control of Permanent Magnet Starter

Abstract

Abstract This paper investigates an improved active disturbance rejection torque controller for the permanent magnet starter of micro gas turbine engine. Based on the motivation of decreasing the workload of the extended state observer and realizing the better control performance, the system disturbance is modeled in advance, and it is compensated actively in the closed-loop system. The following works have been carried out. First, in order to model the system disturbance, we identify the stator resistance, inductance and rotor flux linkage online by the recursive least square with forgetting factors method. Then, we describe the structure of the improved active disturbance rejection controller in detail and the stability of the improved extended state observer is proved. Finally, we verify the proposed controller on the Matlab/Simulink environment, and the tuning rules of different controllers are given. Simulation results illustrate that the parameters can be online identified accurately and the system disturbance can be well modeled. The speed and torque responses of the permanent magnet starter have better control performance and stronger robustness with the investigated controller, compared with the conventional active disturbance rejection controller.