Abstract: A method of joining the acceleration feedback control based on Kalman filter in the traditional closed-loop speed control system is proposed to further improve the line-of-sight stabilization accuracy of airborne opto-electronic stabilized platform. Kalman filter collects the input and output signals of the servo system of opto-electronic stabilized platform as its input signal, and outputs the filtered signal of velocity and the estimated result of acceleration. The output speed and acceleration signals are used as the feedback signals of speed loop and acceleration loop, respectively. The simulation and prototype experiment were made. The results show that the acceleration feedback control based on Kalman filter can effectively improve the suppression effect of opto-electronic stabilized platform on the disturbance torque of different frequencies, and the disturbance isolation is better than 20 dB. The step response overshoot is reduced by 40% at least compared to traditional control schemes. The acceleration feedback control based on Kalman filter can effectively improve the servo control performance of opto-electronic stabilized platform.

Key words: airborneopto-electronicstabilizedplatform, accelerationfeedback, Kalmanfilter, disturbanceisolation