摘要
为提升线路运能,推动城市轨道交通列车控制系统升级,提出一种多通信结构列车控制系统下的地铁列车编队运行优化控制策略。分析以T2T和T2G通信体系为核心的列车控制系统框架,并基于各系统不同安全防护模式,结合列车运行属性及线路条件,考虑列车追踪运行及节能目标,构建地铁列车编队运行的非线性优化控制模型。为减小优化控制问题的计算复杂度,以满足列车编队运行的实时控制要求,设计融合预测控制和序列二次规划(SQP)算法的列车编队运行控制方法。基于实时反馈的列车状态信息,运用SQP算法对预测时域内子问题进行求解,动态生成编队内及编队间各列车最优控制轨迹。以具有12个车站的地铁线路为例,对不同编队组成和不同安全防护模式下的地铁列车追踪运行优化控制进行仿真验证。研究结果表明:与基于T2G通信结构下采用绝对制动安全防护模式的编队间列车相比,基于T2T通信结构下采用相对制动安全防护模式的编队内列车具有更小的发车间隔和到站延迟,从而验证了所提优化控制策略有利于提升线路空间利用率,实现列车编队高效运行,为提高城市轨道交通运营组织服务水平提供方法支撑。
In order to enhance the capacity of existing lines and realize the upgrade of urban rail transit train control system, an optimal control strategy was proposed for train formation commanded by the train control system with multi-communication structure. Firstly, the framework of train control system with T2T communication and T2G communication structure as the core were analyzed. According to train operation attributes and line conditions, nonlinear optimal control models of train formation were established based on security protection modes of different systems considering tracking operation and energy saving as objectives.Then, in order to reduce the computational complexity of the optimal control problem and thus meet the real-time control requirements of train formation operation, an optimal control method with the algorithm incorporating predictive control and sequential quadratic programming(SQP) was designed. Sub-problems in the prediction horizon were solved by SQP algorithm. The optimal control trajectory of each train for itra-formation and iterformation was dynamically generated based on the real-time feedback of state information. Taking the data from a metro line with 12 stations as an example and the simulation of optimal control for metro trains under different safety protection modes with different train formation structure was executed. According to the results, it is shown that compared with the inter-formation metro trains with absolute braking as the security protection mode based on T2G communication structure. The intra-formation trains with relative braking as the security protection mode based on T2T communication structure possess smaller headway, which verifies the effectiveness and practicality of the proposed optimal control strategy and achieves efficient operation of train formation, providing methodological support for improving the service level of urban rail transit operation organization.
作者
张熠雯
李树凯
陈泽彬
杨立兴
ZHANG Yiwen;LI Shukai;CHEN Zebin;YANG Lixing(State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044,China)
出处
《铁道科学与工程学报》
EI
CAS
CSCD
北大核心
2022年第11期3157-3167,共11页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(72122003,72288101,71621001)
轨道交通控制与安全国家重点实验室(北京交通大学)自主研究课题资助项目(RCS2022ZT002)。
关键词
列车编队
相对制动
序列二次规划(SQP)
预测控制
train formation
relative braking
sequential quadratic programming(SQP)
predictive control
