自动着陆过程中跑道对准控制律设计与仿真

Design and Simulation Verification of Control Law of Runway Alignment in Auto Landing

介绍了一种飞机在自动着陆过程中跑道对准控制律的设计和仿真验证方法。将自动着陆中跑道对准过程分为拦截段、捕获段、跟踪段并结合跑道对准阶段设计了基于分阶段控制结构的控制律算法。基于着陆跑道航向和航迹角间的偏差、航向信标偏差分别设计了捕获门限值、跟踪门限值并作为控制律算法分段结构切换标志位,在捕获阶段及跟踪阶段的控制律算法中以着陆跑道航向和航迹角偏差、航向信标偏差作为控制信号,引入无线电高度调节增益,同时在跟踪阶段加入积分环节有效地提高了跑道对准的控制精度。在某型飞机仿真环境中开展验证,仿真结果表明所设计的跑道对准控制律在自动着陆过程中能够快速、平滑的完成跑道捕获及跟踪,并具备控制精度高、控制平稳等优点。

This paper mainly introduces the design and simulation verification method of a control law of runway alignment in auto landing.The runway alignment process is divided into interception phase,capture phase,tracking phase and design the control law algorithm based on staged control structure.Based on the deviation between the heading of runway and the airplane track angle,localizer beam error,the capture threshold and the tracking threshold are designed respectively and used as the switching flag of the staged control structure of the control law algorithm.The deviation between the heading of runway and the airplane track angle,localizer beam error as the main control signals,the gain adjusted by radio height is introduced,and the integral is added in the tracking phase to improve the control precision in the capture phase and tracking phase of runway alignment.Developing simulation verification in an airplane simulation environment.The simulation results show that the designed control law of runway alignment can quickly and smoothly complete the runway capture and tracking in the process of auto landing,and has the advantageds of high control precision and stable control.