大俯仰角度的两轴两框架平台稳定技术

Stabilization technology for two-axis two-framework platform with big pitching angle

为了解决大俯仰角度方位平台稳定性能降低的问题,利用两轴两框架稳定平台稳定原理,分析在传统方位陀螺安装方式下,大俯仰角度时方位平台稳定性能降低的原因以及正割补偿带来的噪声等问题,提出在方位平台上安装2个正交的方位、横滚陀螺,解算出瞄准线方位惯性角速度,从而实现大俯仰角度下的方位稳定控制方法。仿真实验验证了该方法可以提升大俯仰角度下两轴两框架平台的方位稳定控制性能,减小陀螺噪声对控制性能的影响,在同等条件下,方位稳定误差峰峰值由450urad减小为250urad。

In order to resolve the issue of azimuth platform stability depressing,by using the stabilization principle of two-axis two-framework platform,the reason for the stability depressing and the noise caused by secant compensation of azimuth platform were analyzed,which worked in big pitching angle with azimuth gyro of tradition fixing mode.We proposed to install an azimuth gyro and a roll gyro,which were orthogonal,on the azimuth platform to calculate the inertial azimuth angle velocity of line of sight,and realized the controlling method of azimuth stability with big pitching angle.Simulation experiment validates that,the azimuth stability controlling performance of the two-axis two-framework platform with big pitching angle can be advanced and the influence of gyro noise on the controlling performance can be depressed by using the method.Under the same conditions,the peak-to-peak error of azimuth stabilization can reduce form 450 urad to 250 urad.