摘要
针对主动径向液压伺服控制系统发热量过高的问题,文章提出了一种基于脉冲编码调制技术的轮对主动径向数字阀液压控制系统方案,以高速开关阀脉冲编码调制控制代替伺服阀控制,从根源上解决热量产生的主要环节。文章介绍了脉冲编码调制数字阀控制原理,推导了脉冲编码调制数字阀控液压系统数学模型,提出了包含位置控制和压力控制的速度前馈项的闭环控制器设计方法;在完成系统的位置轨迹跟踪控制性能仿真后,搭建脉冲编码调制数字阀控液压系统试验台,开展了车辆通过曲线半径250 m线路时关于轮对的期望位置轨迹跟踪性能试验和故障工况试验。试验结果表明,系统不仅具有较好的位置轨迹跟踪控制精度,而且有较好的容错性能,为解决主动径向液压伺服控制技术应用于车辆时系统出现发热的问题提出了解决方案。
This paper addresses the issue of excessive heat generation in active radial hydraulic servo control systems by proposing an active radial digital valve-controlled hydraulic system for wheelsets based on the pulse-code modulation(PCM)technique.This ap-proach mitigates heat generation at its source by replacing the servo valve control with high-speed on/off valve-based PCM control,with a focus on the main contributing elements.A mathematical model of the PCM-based digital valve-controlled hydraulic system was de-rived from an analysis of PCM-based digital valve control principles,and a closed-loop controller design method was developed,which incorporates speed feedforward terms for both position and pressure control.Following simulations on position trajectory tracking con-trol performance,a test stand was built for the PCM-based digital valve-controlled hydraulic system.This experimental setup was then utilized to conduct experiments assessing position trajectory tracking performance and fault conditions for wheelsets on trains negotiat-ing a track section with a curve radius of 250 meters.The results indicate that the proposed system not only achieves precise position tra-jectory tracking control,but also demonstrate satisfactory fault tolerance performance.The proposed system offers a solution to the sys-tem overheating associated with the application of the active radial hydraulic servo control technique on trains.
作者
倪文波
刘书炜
王雪梅
NI Wenbo;LIU Shuwei;WANG Xuemei(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,Sichuan,610031,China;Jiangshan Heavy Industries Research Institute Co.,Ltd.,Norinco Group,Xiangyang,Hubei 441005,China)
出处
《机车电传动》
2024年第5期151-159,共9页
Electric Drive for Locomotives
基金
四川省国际科技创新合作项目(2022YFH0038)。
关键词
地铁车辆
轮对主动径向
脉冲编码调制
数字阀控液压系统
城市轨道交通
subway train
wheelset active radial
pulse-code modulation
digital valve-controlled hydraulic system
urban rail transit
