2026. MPROVEMENT OF ACTIVE DISTURBANCE REJECTION CONTROL PERFORMANCE INTHE TARGET-INDICATING GIMBAL SYSTEM USING THE M-TH ORDEREXTENDED STATE OBSERVER WITH FREQUENCY ESTIMATION. Kashf Journal of Multidisciplinary Research. 3, 10 (Oct. 2026), 14–34. DOI:https://doi.org/10.71146/kjmr1029.