光电跟踪系统纯角度滤波器的设计

Abstract

To improve the precision of an opto-electronic tracking system without installing new equipment,an assistant tracking with surplus angle information was carried out and a filter tracking only by angle information was designed.Firstly,the working principle of the opto-electronic tracking system with a laser-infrared detector was introduced,and a target model based on the current statistical model was established in a globe-coordinate.Considering the complex noise interference in the high frequency image series in a angle track process,the set-membership estimation was introduced to repair the maneuvering model,then a self-adjusted ellipsoidal bounding filter whose tracking was only by angle was designed.Finally,a simulation on the course tracking to enemy targets was performed by the opto-electronic system on the ship.The comparison results show when the laser detector probability decreases to fifty percent,the filter designed by ellipsoidal bounding algorithm could track the maneuvering target stably with a Room Mean Square Error(RMSE) of target angle less than 0.6 mrad.The filter could overcome the effect of non-white noises and has some practical values in engineering.