TAWS低空风切变告警功能仿真验证平台设计

A Simulation and Verification Platform for Low-Level Windshear Warning Function of TAWS

低空风切变对飞机运行安全会产生严重的威胁,而地形感知与告警系统(TAWS)的Mode 7能够根据飞机当前空速、攻角、无线电高度等探测低空风切变的存在,从而提示飞行员躲避危险,避免可控飞行撞地(CFIT)的发生以确保飞行安全。为了解决TAWS Mode 7功能验证时难以建立真实装机试飞环境的问题,针对某航空研究所研制的TAWS工程样机,设计了低空风切变探测功能的仿真验证平台。仿真验证平台以低空风切变模型和六自由度飞机模型为核心生成低空风切变探测所需的数据,利用飞行场景数据库进行多次仿真,可以验证TAWS Mode 7是否能在飞机穿越风切变时给出准确的提示和告警信息。

Low-level windshear is a serious threat to the safety of aircraft operation. The Mode 7 function of Terrain Awareness and Warning System （TAWS） uses real-time airspeed, angle of attack, radio altitude and other information to detect the presence of low-level windshear. This function will warn the pilot to avoid dangerous situation that will lead to Controlled Flight Into Terrain （CFIT） caused by windshear. The onboard verification conditions for TAWS Mode 7 function is very difficult to achieve, so a simulation and verification platform was developed to establish verification conditions for an engineering prototype TAWS. This platform uses low-level windshear model and a 6 DOF aircraft model to generate the data required by TAWS for wind shear detection. A flight scene database is established to simulate the scenarios for many times, and whether the caution and warning alerts will be given correctly when flying though an windshear is then verified.