飞机迎角的校准及测量

本文首先叙述了迎角传感器空中校准的必要性和常用校准方法,简要介绍了各种常用空中校准方法的原理及其优缺点。实践表明利用静姿态角法阳参数辨识法相结合进行迎角空中校准,在一定范围内是切实可行的。但在大迎角及失速飞行中因非线性带来的一些问题大大增加了校准的难度。本文针对这一事实提出了用直接测定姿态角加计算航迹角间接确定飞机迎角的方法,解决了Y—7飞机失速试飞中的迎角测量问题。实践表明,该方法可以推广用于一般民用飞机的迎角测量。

THE CALIBRATION AND MEASUREMENT OF AOA OF AIRCRAFT

First, the necessity and the conventional methods of in-flight calibrating of AOA are described. The philosophy and the shortcoming/benefits of various conventional in-flight calibration methods are introduced. By practice, it is pointed out that the calibrating of AOA by using the parameter identification combined with the static pitch attitude is a practical method in certain extent.But in high AOA and stall speed flight, the nonlinearity will make thr in-flight calibrating of AOA very difficulty. Based on this, the method that determine the AOA indirectly by measuring the pitch angle and estimating flight track angle is proposed. The problem of measurement of AOA in stall speed flight test of Y-7 aircraft is solved. Practising has indicated that the proposed method can be extended and used to solve all the problems of measurement of AOA in civil aircraft flight test.