横航向飞行品质对参数的灵敏度分析

使用等效系统评价方法，根据数值计算结果分析了全权限电传操纵飞机从小迎角到失速迎角横航向飞行品质对于气动参数变化的灵敏度。结果表明飞行品质对操纵效能变化很灵敏，对横向气动导数变化又较航向灵敏，特别对于高增益、强调横向操纵飞机更为如此。同时建议飞控系统横航向通道随迎角调参，以确保在更宽的迎角范围内具有满意的飞行品质。

Analysis on sensitivity of lateral and directional flying qualities to variation of parameters

By use of the equivalent low order system matching method, sensitivity of the lateral and directional flying qualities of all authority, fly by wire aircraft (FBW a/c) to variations of aerodynamic parameters was investigated from low up to stall angles of attack. It is shown that the flying qualities are sensitive to variations of the control surface effectiveness, and they are more sensitive to variations of the lateral aerodynamic parameters than those of the directional ones especially for lateral controllability stressed a/c with high control system feedback gains. Furthermore, it is suggested that the gains of the lateral and directional paths in the flight control system be adjusted with the angle of attack for consistently satisfactory flying qualities within a wide regime of angle of attack.