基于飞行仿真的近地告警包线计算

TSO-C151b标准中近地告警包线为通用模型设计,未结合飞机的自身特性。为精确给出飞机过大下降速率告警包线,通过结合飞机自身气动特性和操纵特性,分析告警机理,建立飞机六自由度仿真程序。依据飞机发动机数据、气动力数据、质量特性数据等,建立仿真模型及操作程序,实时模拟飞机各舵面的操作响应过程,以及飞机的运动姿态和飞行轨迹,计算飞机在不同下降速率时拉起的损失高度,设计近地告警包线。实际试飞数据验证了模型设计合理,计算结果准确。同时,将仿真计算得出的告警包线与TSO-C151b对比,给出适用于飞机的近地告警包线使用建议,保证飞机飞行安全。

Calculation of ground proximity warning envelope based on flight simulation

The ground proximity warning envelope in TSO-C151b standard is a general model design without considering the characteristics of the aircraft. In order to accurately give the warning envelope of excessive descent rate of a certain aircraft, the alarm mechanism was analyzed by combining the aerodynamic characteristics and control characteristics of the aircraft, and a six degree of freedom simulation program was established. Based on the aircraft engine data, aerodynamic data and quality characteristics data, simulation models and operation procedures were established to simulate the operation response process of each rudder surface, as well as the motion attitude and flight path of the aircraft in real time. The loss height pulled up by the aircraft at different descent rates was calculated, and the ground proximity warning envelope was designed. The actual flight test data verified that the model design is reasonable and the calculation results are accurate. The alarm envelope obtained by simulation is compared with TSO-C151b, and the suggestions for the use of the ground proximity warning envelope are given to ensure the flight safety of the aircraft.