摘要
战斗机采用过失速机动动作能够有效地提高空战效能和生存能力.利用四元数法建立了带推力矢量的飞机大迎角全量运动方程,依据过失速机动的主要目的"改变机头指向",结合战斗机的机动性和敏捷性,分析了在过失速机动过程中主要运动参数的变化规律,提出了分析评估飞机过失速机动性能优劣的4个指标,即最大配平迎角、从平飞状态拉起到机动迎角和从机动迎角恢复至初始平飞状态的时间、在机动迎角下绕速度矢量滚转并截获90°倾斜角的时间和过失速空战周期,并针对这4个指标开展了相应的全量仿真和量化评估研究,结果表明提出的指标可对过失速机动动作做出有效评估.
The post-stall maneuver can effectively improve the fighter＇s ability of air-combat and survival. The dynamic equations of high angle of attack with thrust vector using quaternion method were built. According to the purpose of post-stall maneuver -changing nose pointing, and combining maneuverability and agility, the changing law of primary parameter of post-stall maneuver process was analyzed. Four indexes evaluating the post-stall maneuver quality were proposed, including maximal trim angle of attack, the time taken to change from level flying to maneuver angle of attack and the time taken to change from maneuver angle of attack to initial level flying, the time taken to roll around velocity vector and reach 90° angle of bank at maneuver angle of attack, and the period of post-stall air-combat. The simulation and quantitative evaluation research was carried out, and the results show that these indexes brought forward can lead to convincible evaluation of post-stall maneuver.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2008年第9期1053-1056,共4页
Journal of Beijing University of Aeronautics and Astronautics
关键词
过失速机动
推力矢量
四元数
机头指向
post-stall maneuver
thrust vector
quaternion
nose pointing
