飞机急滚稳定性的一种简化分析方法

本文给出了预估飞机急滚全局稳定性的一种简化分析方法。该方法有两个特点;(1)所需气动数据少;(2)计算方法简单易行。算例表明,简化解与精确解在小迎角时吻合得极好,在大迎角时数值差异稍大,但变化趋势一致。此外,本文还分析了气动导数对急滚稳定性的影响,发现了平衡解的一些特殊变化。

A NEW SIMPLIFICATION METHOD FOR ANALYSING THE RAPID ROLLING STABILITY OF AIRCRAFT

The Bifurcation Analysis and Catastrophe Theory Method (BACTM) is the most effective and dependable method to analyse the global stability of nonlinear systems until now. The BACTM simplification approach for rapid rolling maneuver in order to predict the global stability of an aircraft with analytic method is presented in this paper. This simplification method can play an important role when the complete aerodynamic data or the physical mechanism research of effect on the aircraft stability are lacked at the beginning stage of an aircraft design. The results of the simplification method are in good agreement with that of the accurate ones. Moreover, the effects of aerodynamic derivatives on the rapid rolling maneuver behavior are analysed and some special situations of equilibrium states are found out.