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针对机翼结冰,采用积冰严重程度参数描述积冰对飞机气动特性的影响;将积冰严重程度参数引入飞机六自由度非线性动力学模型,应用SIMULINK建立了随积冰严重程度而变化的时变飞机仿真模型;以飞机迎角作为关键参数,通过实时在线计算飞机结冰后的失速迎角,建立了开环状态下的飞机结冰包线保护系统;对俯仰姿态下的飞机积冰过程进行了仿真。结果表明:该系统能使飞机保持在安全迎角内,保证积冰条件下飞行安全。
The ice accretion severity parameter is used to describe the effect of ice accretion on the aerodynamic performance of the aircraft. The severity parameter of ice accretion is introduced into the nonlinear six-degree-of-freedom flight dynamics model. The SIMULINK Time-varying aircraft simulation model. Taking the angle-of-attack of the aircraft as the key parameter, the ice-jamming envelope protection system of the aircraft under open-loop condition was established by real-time on-line calculation of the stalling attack angle after the ice icing. The ice process was simulated. The results show that the system can keep the aircraft within the safe angle of attack and ensure the flight safety under ice accretion.