倾转旋翼机模型线性化及稳定性分析

在建立倾转旋翼机非线性动力学方程的基础上,推导了线性模型系数矩阵中各元素的求解式。利用各模式下的配平结果,计算了相应的线性化模型。通过对线性化模型系统矩阵特征值的分布情况,分析了倾转旋翼机的本体稳定性。给出的线性化方法通用性强,适合于任意飞行状态下线性模型的计算。

Study on Linear Model and Stability Analysis of Tiltrotor Aircraft

After presenting the nonlinear flight dynamic model of tiltrotor aircraft, this paper described the method for calculation of each element of the linear state-space model coefficient matrices. Using the trimmed results under desired flight conditions, a series of linear model were achieved. Then the body stability of tiltrotor aircraft was studied by the distribution of stability matrix eigenvalues in the complex plane. The presented linearization method is common used for the linear model calculation under any given flight conditions.