基于光电跟踪的火炮轴线空间角测量方法

Measurement method of artillery axis space angle based on photoelectric tracking

惯导设备是火炮等武器系统的核心设备,在正常工作时,惯导设备与火炮身管轴线保持一致,为火炮提供空间指向。因而,对惯导设备进行精度测试和安装标校可以通过对火炮身管轴线空间指向的测量来实现。利用光电跟踪和北斗双天线定向,提出了一种快速动态测定火炮身管轴线空间指向的方法,将相位激光测距机和高分辨率相机安装在高精度双轴伺服机构上,将北斗双天线分别安装在目标靶板和伺服机构上,同时获取初始空间角、空间距离、空间转角等信息,通过实时空间解算获取火炮身管轴线的空间指向。利用蒙特卡洛方法对基于光电跟踪的火炮轴线空间角测量系统误差进行了仿真分析。通过实验验证,火炮轴线空间角测量误差小于0.25 mil,与蒙特卡洛分析结果相当。测量效率较传统双站经纬仪方法提高3倍以上。实验结果表明,可以利用所提出方法替代双站经纬仪方法对惯导设备进行精度测试与安装标校,以提高工作效率。

Inertial navigation equipment is the core equipment of artillery and other weapon systems.In normal operation,the inertial navigation equipment is consistent with the axis of the artillery barrel to provide space orientation for the artillery.Therefore,the precision test and installation calibration of inertial navigation equipment can be realized by measuring the spatial direction of artillery barrel axis.A method for fastly and dynamically measuring the spatial direction of artillery barrel axis is proposed by using photoelectric tracking and Beidou dual antenna orientation.A phase laser rangefinder and a high-resolution camera are mounted on a high-precision two axis servo mechanism.The Beidou dual antenna is installed on the target plate and servo mechanism respectively.At the same time,the initial space angle,space distance,space angle and other information are obtained.The spatial direction of artillery barrel axis is obtained through real-time spatial solution.The error of artillery axis space angle measurement system based on photoelectric tracking is simulated and analyzed by using Monte Carlo method.The experimental results show that the measurement error of artillery axis space angle is less than 0.25 mil,which is equivalent to the results of Monte Carlo analysis.The measuring efficiency is more than 3 times higher than that of the traditional two station theodolite.Therefore,the proposed method can be used to replace the double station theodolite method for precision testing and installation calibration of inertial navigation equipment to improve work efficiency.