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列车的可靠制动是其安全运行的必要保证,而制动过程中的防滑控制又是安全制动和缩短制动距离的有效途径。建立车辆制动动力学模型和单轮对制动动力学模型,车辆系统自由度为42,建模中考虑车辆系统悬架力非线性、轮轨接触几何关系非线性和轮轨蠕滑力非线性。考虑到盘型制动系统的摩擦特性和制动缸压力变化特性,建立了制动系统力学模型。采用P控制方法,用数值仿真方法研究准高速列车制动过程的防滑控制。计算结果表明,P控制能有效防止车轮在轮轨粘着力较低时的滑行,从而提高制动的可靠性和缩短制动距离,并减小制动过程中车辆的纵向振动。
The reliable braking of a train is a necessary guarantee for its safe operation, and the anti-skid control in the braking process is also an effective way of safely braking and shortening the braking distance. The vehicle braking dynamics model and the single-wheel braking dynamics model are established. The degree of freedom of the vehicle system is 42. The nonlinearity of the suspension force of the vehicle system, the non-linear relationship between the wheel-rail contact geometry and the wheel-rail creep force Linear. Taking into account the friction characteristics of the disc brake system and the characteristics of the brake cylinder pressure changes, a mechanical model of the brake system is established. P control method is used to study the anti-skid control of the quasi-high-speed train braking process by numerical simulation method. The results show that P control can effectively prevent the wheels from gliding when the wheel-rail adhesion is low, so as to improve the reliability of braking and shorten the braking distance and reduce the longitudinal vibration of the vehicle during braking.