一种基于小波分析的时变飞行品质准则

A time-varying flying qualities criterion based on wavelet analysis

Ⅲ型驾驶员诱发振荡(PIO)是由飞机特性突变引起的人机不良耦合,具有非线性、时变等特点,对现代飞机的飞行安全构成严重威胁。为了研究Ⅲ型PIO问题,介绍了一种基于小波分析的时变飞行品质准则。该准则采用小波分析方法计算驾驶员输出的能量峰值和飞机被控对象的相位滞后两个特征参数,对时变人机系统进行了飞行品质评价。驾驶员在环仿真试验结果表明,该准则不仅能够预测PIO的发生,尤其是Ⅲ型PIO,还能够给出估计的PIO发生时间。研究成果可为Ⅲ型PIO的分析提供有效手段。

CategoryⅢpilot induced oscillation(PIO)is an adverse pilot-aircraft coupling caused by sudden changes in aircraft characteristics.It has nonlinear and time-varying characteristics and poses a serious threat to the flight safety of modern aircraft.In order to study the categoryⅢPIO problem,this paper introduces a time-varying flying qualities criterion based on wavelet analysis.The criterion uses the wavelet analysis method to calculate the energy peak of the pilot’s output and the phase lag of the aircraft.The flying qualities result is evaluated for the time-varying pilot-aircraft system.The pilot-in-the-loop simulation experiment results show that the criterion can not only predict the occurrence of PIO,especially the categoryⅢPIO,but also give the estimated PIO occurrence time.This research provides an effective means for the analysis of categoryⅢPIO.