减少飞机对风切变敏感性的研究

本文用时域内改变加权阵Q方法,优化设计有风切变时飞机的下滑控制系统。在设计过程中将风切变强度v′_f作为系统中的一个变量,使设计出的系统对风切变强度的灵敏度减少,即系统具有鲁棒稳定性。为了比较,文中还用二次型性能指标优化设计同一个系统。另外对性能指标中加权阵Q和鲁棒矢量加权阵Q_5元素的选取作了探索。

A STUDY ON REDUCTION OF AIRCRAFT SENSIFIVITY TO WIND SHEAR

In this paper, the flight control system of aircraft for the approach glide phase is designed by using Qmatrix modification in the time domain in low-altitude wind shear. The wind shear gradient vf is regarded as a parameter of time invariant linear system in the design. Then the effect of the intensity of wind shear on the designed system will be reduced. In other words, the system will possess the stability robustness. In order to compare the results of two designs, the same system is also designed by minimizing the guadratic form performance index. In addition, how to choose the elements of matrix Q& Qs in the system design is explored.