基于机载光电成像系统光学铰链离轴的伺服抗扰算法设计

Servo disturbance rejection algorithm design of off-axis optical hinge based on airborne photoelectric imaging system

摘要:

在小型化机载光电成像系统中，光学铰链与伺服框架轴非正交的离轴设计，给光轴指向控制及卸载飞机扰动的稳定控制带来了一定的困难。为了解决这一问题，系统控制回路采取半捷联设计，通过使用经微分处理后的伺服框架角信号，与叠加了经抗扰算法处理的飞机载体三轴角速度信号共同作为稳定回路的期望值，再进行匹配滤波。对比采用陀螺信号反馈的直接稳定控制回路具有相似的稳定精度。

Abstract:

In the miniaturization airborne photoelectric imaging system, the non-orthogonal off-axis design on optical hinge and servo gimbal axis, brings some difficult on optical axis pointing control and the stability control of unloading aircraft disturbance. To solve the problem, using half-strapdown design on system control loop, via servo gimbal axis signal by differential processing, and tri-axial angular speed signal on aircraft carrier overlying disturbance rejection algorithm, treated as expected value of the stable loop, then match-filtering is given. Compare with the direct stable control loop by using gyro signal feedback, provided with similar stable precision.