A hybrid control strategy for the optoelectronic stabilized platform of a seeker

Abstract

In order to improve the rapidity and disturbance rejection rate of the optoelectronic stabilized platform of a seeker, a hybrid control strategy for stabilized loop of the optoelectronic stabilized platform is proposed in this paper. The hybrid control strategy consists of Butterworth low pass filter, disturbance observer (DOB), notch filter and incomplete derivative proportional integral derivative (IDPID) controller. Firstly, the controlling architecture and stabilized principle of the optoelectronic stabilized platform are analyzed. Secondly, the hybrid control strategy is analyzed. Finally, experiments of the seeker using the proposed hybrid control strategy and traditional proportional integral (PI) controller are carried out. In addition, the experimental set-up provides a comparison to the two controllers. Experimental results show that the requirements are totally met, the bandwidth of the stabilized loop with the proposed hybrid control strategy is 133.6 rad/s, and the disturbance rejection rate is 2.45%, which improve the performance of the seeker effectively.