基于车体横移振动的高速列车虚拟复合阻尼天棚控制算法研究

Research on The Control Algorithm of Virtual Composite Damping Ceiling for High-speed Train Based on Transverse Vibration of Vehicle Body

摘要:

高速列车车体横向随机振动由车体的横移振动、侧滚振动和摇头振动三自由度合成,是影响车体横向平稳性的关键。为了改善列车横向运行平稳性,提高半主动控制性能。本文通过建立某型高速列车动力学模型,对车体横向振动特性进行分析,得出横移振动的加剧是造成车体合成横向振动和横向平稳性恶化的主要原因。通过分析在传统天棚阻尼控制算法下分别以车体合成横向振动和以横移振动为反馈对车体横向振动的控制效果,得出采用以车体横移振动为反馈的传统天棚阻尼控制算法对车体横向振动的抑制效果更佳。在此基础上,提出一种以车体横移振动为反馈的虚拟复合阻尼天棚控制算法,并进行联合仿真分析。结果表明：相比于被动控制,采用本文提出的虚拟复合阻尼天棚控制算法后,车体合成横向振动加速度峰值、均方根值和平稳性改善率分别达到了46%、43%和19.5%,均高于采用传统天棚阻尼控制算法。可见采用本文提出的虚拟复合阻尼天棚控制算法在抑制车体合成横向振动,改善车体横向平稳性方面控制性能更佳。

Abstract:

The transverse random vibration of a high-speed train is composed of three degrees of freedom of motion, roll and shake vibration, which is the key to the lateral stability of the train.In order to improve the train lateral running stability, improve the semi-active control performance.In this paper, a dynamic model of a high-speed train is established to analyze the lateral vibration characteristics of the vehicle body, and it is concluded that the aggravation of the lateral vibration is the main reason for the deterioration of the composite lateral vibration and lateral stability of the vehicle body.Based on the analysis of the control effect of the vehicle body composite transverse vibration and the transverse vibration of the vehicle body as feedback under the traditional ceiling damping control algorithm, it is concluded that the traditional ceiling damping control algorithm with the transverse vibration of the vehicle body as feedback has better suppression effect on the vehicle body transverse vibration.On this basis, a virtual composite damped ceiling control algorithm based on the feedback of vehicle body transverse vibration is proposed, and a joint simulation analysis is carried out.Results show that compared with the passive control, adopt virtual composite damping ceiling control algorithm is proposed in this paper, the synthesis of lateral vibration acceleration peak value of the body, root mean square value and the stability period reached 46%, 43% and 19.5%, respectively, were higher than the traditional ceiling damping control algorithm, is adopted in this paper, the virtual composite damping ceiling synthesis transverse vibration control algorithm in the inhibition of car body, improve body lateral stability has better control performance.