A strategy to control the hunting instability of railway vehicles, which is based on analysis of the effects of vehicle structure characteristics and system parameters on motion stability of high-speed trains, is developed and then validated by parameter sensitivity analysis. Then, the principle for setting the target value of the vehicle critical speed is discussed in terms of nonlinear effects of system parameters, engineering application, and operational features of high-speed trains. The ranges of system parameters in engineering applications are analyzed, including the carbody mass, the stiffness and damping of the secondary suspension, the longitudinal and lateral positioning stiffness of the axle box, and other suspension parameters. By analyzing the sensitivity of train motion stability to parameters and the effects of parameters on vehicle dynamics performances, optimization principles based on sensitivity and principles for performance balance are proposed. Besides, the reliability design of vehicle motion stability is introduced.%从车辆结构特征和系统参数对高速列车运动稳定性影响的关系出发,提出了合理的遏制车辆蛇行失稳控制策略,并利用灵敏度分析对控制策略进行了验证.针对系统参数的非线性影响、工程应用以及服役特性,探讨了临界失稳速度设计目标值的确定原则；从车体质量、二系悬挂刚度及阻尼、轴箱纵横向定位刚度等悬挂参数的工程应用角度,给出了参数的选择范围；从列车运动稳定性对参数灵敏度和参数对动力学性能的影响,提出了基于灵敏度的优化原则和性能均衡原则,并引入了运动稳定性的可靠度设计理念.
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