动机座光电跟踪系统速度建模与视轴复合校正

Speed Model Building and LOS Compensation in a Dynamic Platform Optoelectronic Tracking System

动机座光电跟踪系统其视轴会受到机座摇摆的影响,而增大跟踪误差;单纯的进行视轴稳定无法满足复杂级别摇摆角度下的跟踪精度,或者导致跟踪失败;对平台罗经惯导角度数据进行速度数学建模,首先通过有限记忆滤波得到速度的平滑数据,再通过机动检测决策机制,对残差进行二次加速度滤波得到大地坐标系下的速度合理数据;大地坐标系下的速度值通过三次线性变换成动机座系的速度值,进行视轴校正,最后将校正的速度数据通过复合控制前馈到速度回路,隔离了机座摇摆对光电系统的影响,其等效4级海况摇摆下,有效隔离度为8.33dB,大大提高了设备的跟踪性能;其分析内容和采用的分析方法也适用于船载、机载或空间光电跟踪系统。

The LOS （line of sight） of the dynamic platform optoelectronic tracking system is influenced by the ship jolting, so the precision is decreased. The tracking precision can not be met with a simple compensation to the LOS. Here we build a speed model for the system with inertial data in the platform. First the smooth speed data are get with Limited Memory Least Square filter and then the remain error is second filtered under the earth coordinates with a mobile detection mechanism to obtain the more reasonable speed data. Through the coordinate transformation, the speed is transformed into dynamic platform coordinates for the LOS compensation. The speed is sent to the compound control loop to isolate the jolting to the optoelectronic tracking system. Under the equivalent 4--class sea wind, the isolation degree is 8.33dB, which present the high tracking precision of the optoelectronic tracking system. The analytic content and way of this text is the same with shipborne, airborne and outer space Optoelectronic tracking system.