棱脊大角度倾斜下的瞄准误差分析  

Influence of prism with large-angle tilt on aiming accuracy

作　　者：郭贺[1] 王建钊[1] 罗长洲[1] 

机构地区：[1]北京控制与电子技术研究所,北京100038

出　　处：《红外与激光工程》2011年第1期138-142,共5页Infrared and Laser Engineering

基　　金：国防预研基金资助项目

摘　　要：制导系统采用惯性测量组合系统的方案时,需要利用光电瞄准设备将精确的大地方位信息传给该组合系统。通常是通过对惯性测量组合系统的棱镜的准直测量实现初始方位对准。而该组合系统工作时不会进行物理调平,因此在准直测量时直角棱镜的棱脊处于非水平状态。直角棱镜的棱脊倾斜必然会带来方位瞄准误差,针对此问题,建立了棱镜棱脊倾斜情况下自准直测量的通用数学模型,给出了精确的测角误差公式。对棱脊大角度倾斜带来的瞄准问题进行了分析,提出了解决方案及误差补偿方法。通过搭建模拟平台,利用高精度光电测量设备进行了实验,验证了数学模型的正确性及补偿方法的有效性。Azimuth data is usually obtained by the aiming equipments which use optics and electronics technology in the inertial guidance platform. Performing initial alignment of azimuth is based on the collimation of the prism which is fixed on the the strapdown inertial measurement unit. The strapdown inertial measurement unit does not level off automatically when it works, so the prism is not aclinic in collimation measurement. The accuracy of the azimuth aiming is influenced greatly by the prism tilting. In this paper, the general mathematical model of auto-collimation measurement was founded considering of the prism tilting. According to the mathermatical model, accurate collimation error was deduced and also the formula of error compensation was derived. The prism with large-angle tilt was specially analyzed and a new method which includes solution and error compensation was proposed. The simulative experiment was completed by using high precision devices. The results show that the mathematical model is right and the formula of error compensation is very effective.

关 键 词：棱脊倾斜 瞄准 误差补偿 准直 

分 类 号：TJ765[兵器科学与技术—武器系统与运用工程]