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本文通过对大振幅非定常实验数据进行处理，采用Ｄｕｈａｍｅｌ积分方法，可获取模型迎角按任意规律变化时的非定常空气动力，并在此基础上，发展了一种从大振幅实验获得小振幅动导数的新方法。结果表明，大振幅非定常实验中包含了小振幅动导实验的信息，从中可以获得各种条件下的小振幅的动导数，而且采用本文的方法，可以在计算机上对各种迎角、振幅、频率下的动导数进行数学模拟，从而可以对大迎角动导数的变化规律有更深入的了解
In this paper, by processing the large-amplitude unsteady experimental data, the Duhamel integral method can be used to obtain the unsteady aerodynamics of the model when the angle of attack changes by any law. On the basis of this, A new method of moving derivatives. The results show that the large-amplitude unsteady experiment contains the information of small-amplitude dynamic conductance experiment, and the dynamic derivatives of small amplitude under various conditions can be obtained. Moreover, the method of this paper can be applied to various angles of attack, amplitude , The frequency of the dynamic derivative of the mathematical simulation, which can be a high angle of attack dynamic variation of the law have a more in-depth understanding