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结冰条件下运输类飞机的适航审定是确保飞行安全的重要保障。建立了飞机本体非线性动力学模型和不同状态的结冰模型,计算了结冰前后飞机对驾驶员控制输入指令的响应特性,并探讨了结冰对飞机爬升性能的影响。仿真结果表明,结冰会导致舵面操纵效率下降,从而引起动态响应特性的恶化,而且飞机出现不对称结冰时将严重偏离正常状态、危及飞行安全,所得结论可为结冰条件下的飞机适航性验证工作提供参考。
Airworthiness validation of transport aircraft under icing conditions is an important guarantee to ensure flight safety. The nonlinear dynamics model of the aircraft body and the icing model of different states are established. The response characteristics of the aircraft to the pilot control input before and after icing are calculated, and the effect of icing on the climbing performance of the aircraft is also discussed. The simulation results show that icing can lead to the decline of the control efficiency of the rudder surface, which leads to the deterioration of the dynamic response characteristics. Moreover, the asymmetric icing of the aircraft will seriously deviate from the normal state and endanger the flight safety. The conclusion may be that the icing condition Airworthiness verification provide a reference.