大机动飞行仿真的一种改进算法

传统的四元数和欧拉角之间的转换仅是对体轴系下的姿态角进行处理,并没有考虑与航迹轴相关的航迹角的转换问题,这样,在大机动飞行仿真中不仅会使飞机方程的解出现奇异,而且不能正确表示飞机的姿态。为此,提出了一种新的改进算法,采用该算法,不仅能够实现全角度的四元数与欧拉角之间的转换,同时也对航迹角的解算进行了相应的处理,使仿真结果与工程实际情况完全一致。经过对多种大机动飞行动作的仿真,验证了本方法是正确、实用的。

A Modified Algorithm in High Maneuver Flight Simulation

Transformation of flight path angles was seldom considered in the traditional method of transformation between quaternion and Euler angle.It could result in incorrect expression of flight attitude.A new algorithm resented in this paper not only can cope with a large-scale transformation between quaternion and Euler angle,but also can do the path angle transforming,so as to get the real solution of flight dynamic equations.Digital simulation results of a lot of maneuvers show that the method is perfectly feasible and applicable in engineering practice.