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本文提出了考虑在非定常气动力作用下;分析、综合弹性飞机小扰动运动特性的一种建议性办法——频率法的推广应用。它直接将谐振运动的非定常气动力数据引入运动方程中,通过作特征方程关系式(指特征方程对应的代数关系)所对应的频率曲线,利用复变函数的知识和特征方程关系式是复变量的解析可微函数条件,并运用作图与曲线拟合相结合的手段从而求得给定状态下弹性飞机运动方程中所需特征根和特征向量,这不仅获得了该状态下弹性飞机的实际运动特性,同时也给出了一些综合、设计的信息。与现行其他方法比较,本文提出的方法,对于研究弹性飞机的动态特性具有分析、计算较为简洁系统,综合设计较为直观方便的特点。
In this paper, a suggestion of considering the unsteady aerodynamic force, analyzing and synthesizing the small perturbed motion of the flexible aircraft - the popularization and application of the frequency method is put forward. It directly introduces the unsteady aerodynamic data of the resonance motion into the equation of motion. By using the frequency curve corresponding to the relational equation of the characteristic equation (referring to the algebraic relation corresponding to the characteristic equation), the relationship between the knowledge and the characteristic equation of the complex function is complex The analytic differentiable function of variables and the method of combining graph with curve fitting can be used to obtain the required eigenvalues and eigenvectors in the equation of motion of a flexible aircraft in a given state. The actual movement characteristics, but also gives some comprehensive, design information. Compared with other existing methods, the method proposed in this paper has the characteristics of analyzing and calculating the dynamic characteristics of the flexible aircraft, comparing with the simple and simple system, and integrating the design more intuitive and convenient.