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本文给出一种分析车辆横向运动稳定性的方法，即利用复模态理论的矩阵摄动法￣［１］来计算临界速度。该方法避免了反复计算矩阵的特征值，从而可节约大量的计算机机时。对矩阵摄动法计算精度的研究结果表明，该方法的精度是足够的。
In this paper, we present a method to analyze the stability of vehicle lateral motion by using the matrix perturbation method of complex mode theory [1] to calculate the critical velocity. The method avoids repeatedly calculating the eigenvalues of the matrix, which can save a lot of computer time. The research on the calculation accuracy of the matrix perturbation method shows that the accuracy of this method is sufficient.