结冰对飞机飞行包线影响分析及控制

为解决飞机在结冰后因飞行包线范围缩小而危及飞行安全的问题,针对飞机纵向三自由度非线性模型分析了翼面结冰对飞行包线的影响。在二级折线软限制式迎角限制器中引入结冰信息,综合考虑各个结冰传感器信号,通过比较采用对迎角、襟翼偏度限制最大的结冰信号来设定限制器阀值,在线/实时地改变可用飞行包线范围,使结冰飞机在缩小的飞行包线范围内能够安全飞行。仿真计算表明,该方法实用有效,可供飞机结冰问题研究人员参考。

Analysis and Control of Icing Effects on Aircraft Flight Envelope

To solve the problem of flight safety due to flight envelope's atrophy for icing,the icing's effects on flight envelope were analyzed based on a three-dimensional longitudinal nonlinear dynamic model.The limiter for angle of attack obtains the icing information,the icing sensor's signals were integrated that the limiter's thresholds were reconfirm with the worse icing signals from angle of attack and flap,the flight envelope's limit was changed in real time so that the aircraft can flight safely in an atrophied envelope.The simulation results show that the analysis and control are both practical and effective,and can give a reference to a person who majors in aircraft icing.