飞翼飞机新型操纵舵面故障效能影响分析

Influences of Control Efficiency of Flying-wing’s New-type Control Surface Faults

飞翼飞机通常采用升降副翼与阻力式方向舵作为操纵舵面,此类舵面的操纵特性与常规舵面区别较大。为研究新型舵面故障情形对飞翼飞机操纵效能的影响,基于舵面的操纵耦合特性,采用可达力矩集方法分析了卡死、松浮、受损三类故障对三轴操纵效能影响,并对比总结了新型操纵面与常规操纵面故障情形对操纵效能影响的区别。研究结果表明,升降副翼故障对飞翼布局飞机的滚转和俯仰操纵能力产生较大的影响,升降副翼卡死故障对效能影响最大;阻力式方向舵发生故障后仍保留一定的偏航操纵能力,同时耦合效应会导致其对俯仰操纵能力产生显著影响;而松浮故障对偏航操纵能力的影响最大。

Drag-rudders and a set of elevons are usually used as control surfaces for flying-wing aircrafts,which are quite different from conventional ones. To clarify the influences of faults on the control efficiency of flying wing aircrafts,accessible moment set method is applied,based on the control coupling characteristics in consideration. Rudder-trapped,rudder-loosening and rudder damage are taken as the objects. The differences between new type control surface faults and the conventional control surface faults on the control efficiency are summarized. According to the research,elevon failure has a great influence on roll and pitch control capability of the aircraft with flying wing layout,and elevon stuck failure has the greatest impact on efficiency. Drag-rudder still retains certain amount yaw control ability after failure,and drag-rudder failure causes a significant influence on the pitching control ability. Besides,loosen of drag-rudder has the greatest influence on yaw control ability.