本文给出了一种在非定常气动力下,对弹性飞行器运动特征根进行综合、控制的方法。它直接获得了特征根对参数变化的敏感性关系式。与古典的根轨迹法等综合、设计方法比较,本文的方法具有能直观看到系统各参数对特征根影响的相对大小,适用于以一般的“系统矩阵”所描述的系统的动态特性综合、设计问题以及计算简便、易行等特点。 In this paper, we present a method to synthesize and control the characteristic root of flexible aircraft under unsteady aerodynamic forces. It directly obtains the sensitivity of the eigenvalue to the change of parameters. Compared with the classical root locus method and other design methods, the method in this paper has the ability to directly see the relative size of the influence of system parameters on the eigenvalues. It is suitable for the dynamic characteristic synthesis of the system described by the general “system matrix” Design problems and calculation is simple, easy and so on.