摘要
针对某型机频域参数辨识过程使用传统的方法选择拟配节点出现的拟配不精确的问题,提出了自动选择拟配节点范围和随失配包线与功率谱密度综合选择拟配节点的方法。飞行试验数据处理结果表明,使用本文改进的辨识方法可提高等效系统辨识精度,同时提高试飞数据处理效率。
There was an inaccurate problem when using traditional methods to choose match intervals on a log scale in the process of frequency domain parameters identification for one aircraft. The new method used the automatic selection of match intervals scope technique and chose the intervals according to mismatch envelopes and power spectral density. The result of flight test data processing demonstrates that the modified identification method can improve the identification precision and improve the flight test data utilization.
出处
《航空科学技术》
2017年第2期34-38,共5页
Aeronautical Science & Technology
关键词
低阶
等效系统辨识
拟配间隔
失配包线
功率谱密度
low order
equivalent system identification
match intervals
mismatch envelopes
power spectral density
