某型运输机纵向等效拟配的问题及分析

Problems and Analysis of Pitch Axis Equivalent Matching for Transporter

摘要:

某型运输机试飞纵向短周期等效拟配中在两个问题,一是纵向杆输入时长较长,频域辨识时高频段结果较差,二是在高阶电传飞机等效拟配时选择单拟配还是双拟配的问题,为了解决这两个问题,提出了时域辨识方法和对比分析传统机械式飞机和电传飞机试验数据方法；飞行试验数据处理结果表明,对于输入时间较长的试验动作,时域辨识效果较频域辨识好,使用时域和频域辨识结合的方法,大大提高了试飞数据的适用性；通过比较传统机械式飞机和现代电传飞机的试飞数据及拟配结果,发现高阶电传飞机必须使用双拟配方法才能更全面评价飞机特性；文中提出的辨识方法和分析方法很好地解决了某型运输机等效拟配中遇到的问题,可供其他电传飞机飞行试验参考。

Abstract:

Two problems in the pitch axis equivalent matching of the transporter were researched and solved in this paper. One problem is the result of high frequency range was bad in frequency response identification due to the long time of the pitch axis input. To solve these problems, domain identification method and contrastive analysis were proposed. The results of the flight test data show that, time domain identification method had better matching result than frequency domain identification method for long time input. A contrastive analysis of one parameter matching and two parameters matching result was made and the two parameters matching method was chosen.Identification method and analysis approach proposed here were effective and can be adopted to the quality assessment of other aircraft.