Modified Active Disturbance Rejection Control Tuning Based on Desired Maximum Sensitivity Constraints for a Class of High‐Order Inertial Processes

Modified active disturbance rejection control (MADRC) is commonly designed for high‐order inertial processes. This paper focuses on the single parameter tuning rule of the system with MADRC based on the desired maximum sensitivity. It is observed that an asymptote exists in the Nyquist curve of the open‐loop transfer function of the high‐order system with MADRC. Based on this asymptote and the maximum sensitivity constraint, the mathematical relationship between the maximum sensitivity and different parameters is derived, and consequently a novel single parameter tuning rule is established. The core advantage is that parameter tuning can be completed by adjusting only one desired maximum sensitivity parameter, while allowing the actual maximum sensitivity to closely match the set value. Comparisons with other control methods verify the effectiveness of MADRC under the proposed tuning rule. Finally, the field application of MADRC to the superheated steam temperature system further validates its advantages. Compared with conventional PI‐PI control, its overall performance is improved by 15%–30%. This indicates its broad application potential in other large inertial processes in industry.