飞翼布局飞机侧风起降特性

Crosswind take-off and landing characteristics of flying wings

飞翼布局飞机的动态特性与常规飞机相差较大,在侧风起降过程中呈现出新的运动特性。对侧风起降过程中飞翼布局飞机的配平特性与响应特性进行了计算与分析,掌握了其区别于常规飞机的特点,侧风对飞翼布局飞机起降安全影响最严重为侧翻效应;结合新型操纵舵面的操纵特性与使用特性,对飞翼布局飞机起降阶段的效能需求开展了分析;通过对常用的侧风操纵策略进行了仿真计算与对比分析,提出了适用于飞翼布局飞机的侧风起降操纵策略。

The stability and controllability characteristics of flying wings are much different from those of conventional airplanes. This difference is prevalent in crosswind take-off and landing. To ensure flight safety in these circumstances, this paper conducts calculation and analysis of trim and response characteristics in crosswind take-off and landing for flying wings. From these, the differences between flying wings and conventional airplanes are derived, with the conclusion that the roll-over is the most serious problem for flying wings taking off or landing in crosswinds. The control efficiency requirements of innovative control surfaces on flying wings during take-off and landing are analyzed based on the control surfaces’ control and usability characteristics. Two control strategies commonly applied to flight in crosswind conditions are simulated and compared; a suitable one for flying wings is proposed.