Characteristics of Grey Active Disturbance Rejection Control Based System Information

Active disturbance rejection control (ADRC) with independent model has been paid much attention in academic fields and industrial process and other industries. However, with the information technique development, numerable data of the concerned system has been obtained, how to use the information to get more effective performance in ADRC is hot topic in research colleges and engineering fields. This paper discussed the adding the information method in linear active disturbance rejection control (LADRC) for a class of motion control systems, and gives two methods of using the known modeling information. The system transfer functions of loop gain and control sensitivity with known modeling information are derived. The proposed methods are used to a mass-spring-damper system for simulation tests and frequency domain analysis. Simulation results show the effectiveness of the proposed method and reduction in energy consumption, the bandwidth and stability margins of loop gain response are changed little as the plant parameter vary significantly, so is the sensitivity to input disturbance and the output noise. All of this indicates that Grey LADRC has a strong robustness against the large variation of parameters in the plant.