考虑杆臂效应与挠曲变形的全自动着舰技术

Automatic landing technology considering lever arm effect and flexural deformation

联合精确进近和着陆系统(JPALS)舰载组件旨在为最终进近阶段的舰载机提供自动着舰能力。针对由于舰船杆臂效应与挠曲变形的存在导致舰载机着舰定位精度下降的问题,开发了一种基于卫星引导的全自动着舰非线性化参数误差模型,结合舰船甲板运动及舰载机纵向飞行控制模型,评估舰船结构挠曲和姿态不确定性对着舰落点精度的影响。结果表明,杆臂效应与挠曲变形对着舰落点精度有显著影响,利用建立的误差模型以及飞行控制模型,能够将着舰落点精度有效控制在着舰标准之内。

The shipboard components of the Joint Precision Approach and Landing System(JPALS)are designed to provide automatic landing capability for the carrier-based aircraft in the final approach phase.However,the landing accuracy of the carrier-based aircraft is reduced due to the existence of ship’s lever arm effect and flexible deformation.In this paper,a nonlinear parameter error model is developed based on satellite guided automatic landing.The model is used with the ship deck motion and longitudinal flight control model to evaluate the influence of ship structure deflection and attitude uncertainty on aircraft landing accuracy.The results show that the lever arm effect and flexible deformation have a significant impact on the landing accuracy.Using the error model proposed and the flight control model,the accuracy of the landing point can be effectively controlled within the landing standard.