建立了横向主动悬挂的１７个自由度计算模型，将主动控制铁路车辆的横向平稳性问题，归结为线性二次型最优问题（ＬＱ问题）求解。计算分析了铁路车辆在采用主动悬挂后横向平稳性改善的情况。计算结果表明，与被动悬挂相比，主动悬挂使车体横向加速度和轮轨作用力均方根值分别降低６０％和２０％左右 A 17-DOF calculation model of transverse active suspension is established, and the problem of controlling the lateral stability of railway vehicles is reduced to solving linear quadratic optimization problem (LQ problem). The calculation and analysis of the improvement of the lateral stability of railway vehicles after the active suspension is adopted. The calculated results show that the active suspension reduces the lateral acceleration of the vehicle body and the wheel-rail force RMS by 60% and 20%, respectively, compared with the passive suspension