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EFDD方法是近年国外提出的一种新的模态辨识分析方法。基于仿真分析研究,提出了能显著提高模态参数辨识准确度的变参数EFDD分析方法。多项试飞应用表明,利用大气湍流激励变参数EFDD分析方法,不仅有效解决了现代大中型飞机密集模态辨识问题,提高了模态参数识别准确度,而且该方法解决了飞行中无法实施人工激励的试飞问题,对现代大中型飞机的颤振试飞具有重要意义。
EFDD method is a new method of modal identification analysis proposed in foreign countries in recent years. Based on the simulation analysis and research, a variable parameter EFDD analysis method that can significantly improve the accuracy of modal parameter identification is proposed. A number of flight test applications show that the use of atmospheric turbulence excitation variable parameter EFDD analysis method not only effectively solve the problem of dense modal identification of modern medium and large aircraft, improve the accuracy of modal parameter identification, and the method can not be implemented in the artificial excitation of flight The flight test is of great significance to the flutter flight test of modern large and medium-sized aircraft.