机载光电跟踪测量设备的目标定位误差分析

Orientation error analysis of airborne opto-electric tracking and measuring device

光电跟踪和测量设备用于测量飞行器在空中的飞行轨迹,作为飞行器飞行性能的评价。随着现代技术的发展,对飞行器性能提出愈来愈高的要求,从而也对跟踪和测量飞行器飞行轨迹的光电跟踪和测量设备提出了相应的技术进步要求,特别是对其测量精度指标。如何做好和完善误差分析、误差分配和误差综合,成为研制更高性能的光电跟踪测量设备总体设计中的一个重要问题,贯穿从可行性论证、方案论证、方案设计、设计、制造、装调、直到试验等整个研制过程。就这一类设备中最为复杂的机载光电跟踪测量设备的目标定位误差(即3轴上的测量误差),通过建立从被测目标到地面中心测量站9 个坐标系,进行31次线性变换,构造35个变量的统一测量方程;进行测量误差因素的分析和分配,以及用蒙特卡洛法来分析和计算系统的目标定位误差。

Opto-electric tracking and measuring device is used to measure flight trace of aircraft. With the development of modern technology, performance demands of aircraft become higher and higher, so does the technology advance of opto-electric tracking and measuring device, especially its measurement precision. Error analysis, distribution and synthesis are very important in developing higher performance opto-electric tracking and measurement device through all the process such as: feasibility demonstration, scheme demonstration, scheme design, design, manufacture, assembly and adjustment, and experimentation. Aiming at the most complicated orientation error analysis, namely measuring error along three axes, we constructed 9 coordinate from measured target to ground center station, carried out 31 times linear coordinate transformation, formed uniform measuring equation containing 35 variables. And we also carried out error analysis and distribution of all factors affecting measurement, and analysis and calculation of orientation error employing Mont Carlo method.