民用飞机校验机动操纵剖面图研究

Study on control motion for checked maneuver in civil aircraft

从研究军民用规范之间的内在关联出发,认为校验机动操纵剖面可以先采用国军标(GJB)的急剧俯仰B操纵形式,然后验证载荷系数为1.0和2.5时的角加速度是否满足要求。如不满足,则调整舵偏量,直到满足要求为止。该方法既保证了急剧俯仰B操纵,又满足了CCAR-25的角加速度要求,非常有助于军民用飞机通用部件的共享,适用性强,解决了困扰工程界多年的关于校验机动载荷计算不一的问题。该方法已编制为计算机程序,为大型客机校验机动载荷计算提供了重要参考。

Checked maneuver is one of the most important loads checking cases stated in CCAR-25for civil aircraft design.Different understanding of corresponding regulations leads to remarkable deviations in load calculations,which greatly affect accurate aircraft loads prediction.From inherent connections between GJB and CCAR-25,an novel operation law for checked maneuver is proposed in this paper.B operation during rapid pitching from GJB is first used,angular accelerations under loads factor of 1.0and 2.5are then checked and adjusted correspondingly until both get satisfied.Current method in this paper can guarantee B operation during rapid pitching for military aircraft,and in the meantime meet requirements for angular accelerations in CCAR-25,which eliminate a long existed disagreement in checked maneuver engineering calculation and will benefit future commonality design between civil and military aircrafts.Homemade computer programs implementing this method have been developed and applied successfully in trunk airliner project.