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ADRC based on disturbance rejection of airborne electro-optical stabilized platform

To improve the anti-interference capability of airborne electro-optical system, on the basis of analysis of the principles of airborne electro-optical stabilized platform, the stability control loop is modeled. The factors which affect the stability accuracy and the deficiencies of classical control algorithm are analyzed briefly. In addition, an improved algorithm is presented based on the active disturbance-rejection control(ADRC). At first, the model of motor was simplified. Then, an extended state observer was designed to estimate the disturbance in real time and the feedback control law with disturbance compensation is designed, too. Eventually, the ability of active disturbance rejection controller is verified and compared with existing classical control algorithm. Simulation prove that the ADRC algorithm can reject the nonlinear disturbance effectively, so this made great sense to improve the stability accuracy of airborne electro-optical system.