摘要
本文用微分方程定性理论来分析俯仰力矩曲线随迎角变化的“勺形”对飞机飞行稳定性的影响。 结果表明,“勺形”是飞机在小侧滑角下作大迎角非机动飞行时,引起迎角突跃而进入过失速飞行的一种重要因素。“勺形区”的宽度和深度则较大程度地影响这种过失速飞行的特性及其进入与改出的特点。
The theory of stability of differential equations is used to analyse the' effect of reversal slope of pitch moment to the stability of aircraft.It is believed that reversal slope range is one of the important factors which leads to sudden change of angle of attack and then the aircraft may proceed to post-stall flight when aircraft flies norimaneuverably at high angle of attack and low angle of sideslip. The width and the depth of the reversal slope range influence seriously the characteristics of this post-stall flight and its entry and recovery.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1990年第6期B217-B222,共6页
Acta Aeronautica et Astronautica Sinica
关键词
飞机
稳定性
力矩曲线
俯仰
reversal slope of pitch moment curve, nonlinearity, the global stability, bifurcation analysis and catastrophe theory.
