飞行品质频域准则的输入激励研究  

Research on Input of Flight Quality Criterion in Frequency Domain

作　　者：支真莉[1] 韩意新 

机构地区：[1]中国飞行试验研究院,陕西西安710089

出　　处：《航空科学技术》2017年第2期29-33,共5页Aeronautical Science & Technology

摘　　要：采用加权交叠平均法(Welch法)对电传飞机的4种典型输入激励进行功率谱估计分析,通过合适的加窗处理和频谱分析得到最优的激励输入,并将扫频输入得到的飞机频率特性使用带宽准则、Neal-Smith准则进行飞行品质评估,最终给出评估结果和结论,这对飞行试验的飞行品质研究具有一定的指导意义。Power spectrum estimation analysis of four typical inputs of the fly-by-wire flight using Welch method, the optimal excitation input was obtained by appropriate windowing and spectral analysis, the frequency characteristics of swept frequency input were used to evaluate the flight quality on bandwidth and Neal-Smith criterion, final results and conclusions were given. It has certain guiding significance to the study of flight quality.

关 键 词：功率谱估计 WELCH法 带宽准则 Neal-Smith准则 

分 类 号：V217.4[航空宇航科学与技术—航空宇航推进理论与工程]