机载光电转台的谐振分析及自适应滤波器设计

在深入分析光电跟踪转台特性的基础上,对光电转台进行了数学建模,并利用转台的转角变化信息,提出了一种基于角度信息的自适应前馈滤波算法。该算法在不改变机械结构和阻尼因素的条件下,有效地抑制了光电转台的机械谐振。实验结果证明:该算法在一个周期后,系统自动跟踪的最大跟踪误差提高了3',是一种易于实现,设计操作简单,实效性好的自适应滤波算法,目前已成功运用到某机载光电对抗转台中,效果良好。

Analysis on resonance of air-borne opto-electronic tracking turntable and design of adaptive filter

According to the characteristics of an air-borne opto-electronic tracking turntable and mathematics model of tracking turntable, a new adaptive filter based on angle changes of tracking turntable is presented to restrain the mechanical resonance of the opto-electronic trackng turntable under the conditions of mechanical structure and damp unchanged. The experiment results indicate that the maximum automatic traking error improves 3'. The proposed algorithm is a fast and stable algorithm, which can satisfy a real-time adaptive filter and restrain mechanical resonance perfectly. At present, this method has been applied to certain type of air-borne tracking turntable successfully.