无人战斗机非线性模型及配平方法

Nonlinear Numerical Model and Trimming of UCAV

综合考虑气动导数建立了无人战斗机非线性模型,从配平的实质出发设计了一个代价函数,将非线性系统的配平问题转换成求代价函数最小值的问题,通过求最小值算法求出无人战斗机的配平点。以直线平飞为算例验证了配平方法的有效性,最后通过对纵向模态的分析说明了无人战斗机模型的合理性。

In this dissertation, a nonlinear numerical model of UCAV is established. To establish the model, all Aerodynamic derivatives are considered. From the Substance of the UCAV trim, a cost function is designed. So the problem of nonlinear system trim- ruing converts to seek the minimum of the cost function. The minimum algorithm colcu- lation derived the UCAV trim point. An example of level flight is to show the effective- ness of the trim method. Finally, through the analysis of the longitudinal mode shows the UCAV model is reasonable.