Optimization Operation of Electric Locomotive Based on Two-stage AdaptiveGauss Re-Collocation Pseudospectral Approach
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摘要: 针对中车株洲电力机车有限公司设计的HXD1-C64电力机车, 提出一种基于两阶段自适应Gauss配点重构的伪谱法, 用于列车优化操纵问题高效快速求解. 首先, 建立了HXD1-C64电力机车优化操纵数学模型; 然后, 在推导Legendre-Gauss配点公式的基础上, 给出控制变量两阶段自适应Gauss配点策略, 第1阶段采用对分配点, 第2阶段引入斜率变化分析对控制变量配点进行自适应细分和合并; 最后, 在运行时间最短目标下对HXD1-C64电力机车优化操纵进行仿真实验. 结果显示, 相较于控制变量参数化方法和传统高斯伪谱方法(Gauss pseudospectral method, GPM), 改进方法获得了更优性能指标和牵引力控制品质, 计算时间分别减少91.93 %和33.88 %, 表明了所提方法的有效性.
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关键词:
- HXD1-C64电力机车 /
- 优化操纵 /
- 两阶段Gauss配点重构 /
- Gauss伪谱法
Abstract: A two-stage adaptive Gauss re-collocation pseudospectral approach is proposed for solving optimization operation problems of HXD1-C64 electric locomotive designed by CRRC (China Railway Rolling Stock Corporation) Zhuzhou Institute Co., LTD. Firstly, the optimization operation mathematical model of HXD1-C64 electric locomotive is established. Next, the Legendre-Gauss collocation formula is derived and then a two-stage adaptive Gauss collocation strategy is given, where a dichotomy collocation is adopted in the first stage and a slope change rate analysis is introduced in the second stage to adaptively subdivide or eliminate control variable collocation points. Finally, the simulation tests are carried out on HXD1-C64 electric locomotive to achieve time minimum operation. Simulation results show that the improved method obtains better performance index and traction control quality, compared with the control variable parameterization algorithm and the traditional Gauss pseudospectral method (GPM), while the computational time decreases by 91.93 % and 33.88 %, respectively, revealing the effectiveness of the proposed approach.1) 控制科学与工程学院工业控制技术国家重点实验室 杭州 310027 1. Key Laboratory of Industrial Wireless Network and Networked Control, Key Laboratory of Intelligent Air-Ground Cooperative Control for Universities in Chongqing, College of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065 2. China Railway Rolling Stock Corporation (CRRC) Zhuzhou Institute Co., LTD, Zhuzhou 412000 3. State Key Laboratory of Industry Control Technology, Col-lege of Control Science and Engineering, Zhejiang University, Hangzhou 3100272) 收稿日期 2019-03-20 录用日期 2019-07-17 Manuscript received March 20, 2019; accepted July 17, 2019 国家自然科学基金 (61803060, 51705050), 重庆市教委科学技术研究项目 (KJQN201800635, KJQN201804306), 工业控制技术国家重点实验室 (浙江大学) 开放课题 (ICT1900359) 资助 Supported by National Natural Science Foundation of China (61803060, 51705050), Science and Technology Research Program of Chongqing Municipal Education Commission (KJQN201800635, KJQN201804306), and Open Research Project of the State Key Laboratory of Industrial Control Technology of Zhejiang University (ICT1900359) 本文责任编委 阳春华 Recommended by Associate Editor YANG Chun-Hua 1. 重庆邮电大学自动化学院工业物联网与网络化控制教育部重点实验室、智能空地协同控制重庆市高校重点实验室 重庆 400065 2. 中车株洲电力机车研究所有限公司 株洲 412000 3. 浙江大学 -
图 2 机车牵引、惰行、制动组合运行示意图
Fig. 2 Traction, coasting, brake composite sketch map of electric locomotive
图 4 两阶段自适应Gauss配点伪谱法算法流程图
Fig. 4 Flow chart of two-stage adaptive Gauss re-collocation pseudospectral approach
图 6 仿真实验1两阶段自适应Gauss配点法状态曲
Fig. 6 State profiles of two-stage adaptive Gauss collocation method for Test 1
图 8 仿真实验2两阶段自适应Gauss配点法状态曲线
Fig. 8 State profiles of two-stage adaptive Gauss collocation method for Test 2
表 1 HXD1-C64电力机车参数
Table 1 Parameters of HXD1-C64 electric locomotive
参数项 参数值 HXD1机车头质量 200 $\times10^3\;{\rm{kg} }$ C64 重车质量 84 $\times10^3\;{\rm{kg} }$ 粘着牵引力约束 $- 461\;{\rm{kN} } \leq {F_u}(t) \le 532\;{\rm{kN} }$ 路程约束 $s(t) = 1\;500\;{\rm{m} }$ 速度约束 $0 \leq v(t) \leq 11.1\;{\rm{m/s} }$ 
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表 2 HXD1-C64电力机车仿真实验1结果对比
Table 2 Numerical results comparison of Test 1 for HXD1-C64 electric locomotive
方法 测试 u(t) 配点数 x(t) 配点数 离散方法 NLP 求解器 性能指标 (s) 求解时间 (s) CVP 1 20 − 统一网格 内点法 142.25 50.41 2 40 − 统一网格 内点法 141.81 210.63 传统 GPM 1 34 34 LG配点 内点法 141.81 8.12 2 48 48 LG配点 内点法 141.62 19.19 本文方法 阶段 1 17 34 两阶段自适应 LG 配点 内点法 141.74 5.77 阶段 2 15 34 阶段 1 24 48 两阶段自适应 LG 配点 内点法 141.59 12.09 阶段 2 17 48
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表 3 HXD1-C64电力机车仿真实验2结果对比
Table 3 Numerical results comparison of Test 2 for HXD1-C64 electric locomotive
方法 测试 u(t) 配点数 x(t) 配点数 离散方法 NLP 求解器 性能指标 (s) 求解时间 (s) CVP 1 20 − 统一网格 内点法 142.26 63.01 2 40 − 统一网格 内点法 141.83 238.79 传统GPM 1 34 34 LG 配点 内点法 141.97 8.10 2 48 48 LG 配点 内点法 141.76 21.47 本文方法 阶段 1 17 34 两阶段自适应 LG 配点 内点法 141.75 5.66 阶段 2 15 34 阶段 1 24 48 两阶段自适应 LG 配点 内点法 141.67 12.60 阶段 2 15 48
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