Abstract: Permanent magnet synchronous motor（PMSM）driving stable platform directly is often used in

guided rockets to realize the decoupling control of stable platform. Due to the extended state observe（ESO）

contained in the active disturbance rejection controller（ADRC），it can accurately estimate the speed of the rotated

carrier and the uncertain disturbances accurately without requiring exact mathematic model of system. Based on

active disturbance rejection control technique，an ADRC for single-axis stable platform was designed，and optimized the controller. The Matlab simulation and experimental verification show that the system has strong anti-interference ability and high control quality.

      Key words: permanent magnet synchronous motor（PMSM）；single-axis stable platform；active disturbance

rejection controller（ADRC）；simulation