机载光电转塔系统轴系误差数值分析

Numerical Analysis of Axial System Error in Airborne Photoelectric Turret System

机载光电转塔系统轴系误差是影响随动跟踪和视轴指向精度的主要因素之一。为了分析轴系误差对精度的影响量值,运用坐标变换的原理,建立了机载光电转塔系统在方位和俯仰理想状态和在轴系误差状态随动跟踪的数学模型,进行了数值计算与仿真分析。仿真特性曲线表明,在不同随动角度下轴系误差对精度的影响是变化的。为了满足机载光电转塔系统高精度随动、视轴指向和高分辨率的探测和感知外部环境,提出了消除误差和提高精度的解决方法,可用于机载光电转塔系统的设计分析、误差控制和技术问题处理,具有一定的实际工程应用参考价值。

Axial system error in the airborne photoelectric turret system is one of the main factors influencing servo tracking and the pointing accuracy of the optical axis. In order to analyze the influence magnitude of the axial system error on the precision, the principle of coordinate transformation was used, and the mathematic models of the airborne photoelectric turret system under the ideal state of yawing and pitching, as well as under servo-tracking with axial system error, were built up. Numerical computation and simulation analysis were carried out. The characteristic curve of the simulation showed that the influence of the axial system error on the precision varies at different servo angles. In order to satisfy the requirements of the airborne photoelectric turret system, such as a high-precision servo-tracking and pointing of the optical axis, and high-resolution environment detecting and sensing, a method for error elimination and precision improvement was put forward. The method can be applied to the design analysis, error control and technical problem disposal of the airborne photoelectric turret system, and is of significance for practical engineering applications.