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

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.