某机载红外转塔低温像面抖动的分析与研究

Analysis and research on image jitter of airborne infrared turret under low temperature

摘要: 针对某机载红外转塔在低温环境下会产生像面抖动的现象，分析了引起像面抖动的主要因素，通过建立模型、热力学分析和静力分析，得出在低温环境下俯仰支架变形量最大为0.34 mm，承受加速度过载下变形最大为0.46 mm。通过对俯仰支架进行调整、固化形态，使俯仰组件低温转动平滑，应力变形量在0.05 mm以内。同时对旋变布线方式及电机电刷安装位置提出了改进措施并给出了控制数据，解决了某机载红外转塔低温像面抖动问题。

Abstract: According to the image jitter of airborne infrared turret under low temperature, the main factors inducing the image jitter are analyzed.Through modeling, thermodynamic analyzing and statics analyzing, the max deflection of the pitch stents is 0.34 mm under low temperature, and is 0.46 mm under acceleration overload.By assembling the pitch stents and solidifying the configuration, deflection of the pitch stents is controlled less in 0.05 mm, which makes the pitch stents turn smoother.Moreover, improvement measures are proposed for spin wiring mode and motor brush installation location and control data is provided, which solves the problem of image jitter of airborne infrared turret under low temperature.