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Recurrent neural network for vehicle dead-reckoning

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Journal of Systems Engineering and Electronics 2008年第2期19卷 351-355页

作者： Ma Haibo Zhang Liguo chen yangzhou School of Electronic Control Engineering Beijing Univ. of Technology Beijing 100022 P. R. China

For vehicle integrated navigation systems, real-time estimating states of the dead reckoning （DR） unit is much more difficult than that of the other measuring sensors under indefinite noises and nonlinear characteristics. Compared with the well known, extended Kalman filter （EKF）, a recurrent neural network is proposed for the solution, which not only improves the location precision and the adaptive ability of resisting disturbances, but also avoids calculating the analytic derivation and Jacobian matrices of the nonlinear system model. To test the performances of the recurrent neural network, these two methods are used to estimate the state of the vehicle＇s DR navigation system. Simulation results show that the recurrent neural network is superior to the EKF and is a more ideal filtering method for vehicle DR navigation.

关键词： dead reckoning extended Kalman filter recurrent neural network vehicle integrated navigationsystems.

Dynamic airspace sectorization via improved genetic algorithm

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Journal of Modern Transportation 2013年第2期21卷 117-124页

作者： yangzhou chen Hong Bi Defu Zhang Zhuoxi Song College of Electronic Information and Control Engineering Beijing University of Technology

This paper deals with dynamic airspace sectorization （DAS） problem by an improved genetic algorithm （iGA）. A graph model is first constructed that represents the airspace static structure. Then the DAS problem is formulated as a graph-partitioning problem to balance the sector workload under the premise of ensuring safety. In the iGA, multiple populations and hybrid coding are applied to determine the optimal sector number and airspace sectorization. The sector constraints are well satisfied by the improved genetic operators and protect zones. This method is validated by being applied to the airspace of North China in terms of three indexes, which are sector balancing index, coordination workload index and sector average flight time index. The improvement is obvious, as the sector balancing index is reduced by 16.5 %, the coordination workload index is reduced by 11.2 %, and the sector average flight time index is increased by 11.4 % during the peak-hour traffic.

关键词： Dynamic airspace sectorization (DAS) Improved genetic algorithm (iGA) Graph model Multiple populations Hybrid coding Sector constraints

A Review for Workload Measurement of Air Traffic Controller Based on Air Traffic Complexity

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A Review for Workload Measurement of Air Traffic Controller ...

第25届中国控制与决策会议

作者： SONG Zhuoxi chen yangzhou LI Zhenlong ZHANG Defu BI hong College of Electronic Information and Control Engineering Beijing University of Technology

ISBN: (纸本)9781467355339

Research on workload measurement of the air traffic controllers has attracted much attention in the air traffic management community because of its important role for the human resource planning, running efficiency, and especially the safety of the air traffic system. Recently, traditional ATM has encountered some challenging problems, such as the substantial increase of the flights number, the more complex airspace, sensitivity to the change of weather, and interaction among the factors mentioned above. Accordingly, The method, ATCs’ workload measurement method based on air traffic complexity, has gradually become the leading one. This paper reviews the process of research on ATCs’ workload measurement, and focuses on three aspects of the ATCs’ workload measurement based on air traffic complexity, including typical models, research methods and some important achievements. It also points out some existing problems which remain to be solved and gives some preliminary ideas for future research.

关键词： Air traffic management Air traffic control ATCs’ workload complexity Dynamic density Hybrid system

Airspace Sectorization Method for Flexible Airspace Management

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Airspace Sectorization Method for Flexible Airspace Manageme...

第37届中国控制会议

作者： Defu Zhang yangzhou chen Department of Electrical Engineering Shandong Polytechnic College of Metropolitan Transportation Beijing University of Technology

A method for airspace sectorization is developed based on initial airspace configuration. The method begins with identifying Traffic Mass（TM） situations in all sectors ahead of time, especially for the sectors that exceeds the defined controller capability to manage（called overloaded sectors） as well as for those that are under-utilized（called under-utilized sectors）. Then, for the overloaded sectors, the method implements the removal of excessive Traffic Mass by moving sector boundaries from the sector with low TM to the overloaded sector in conjunction with a diffusion algorithm. Alternatively, for the under-utilized sectors, they can be combined with their neighbors using General-Clustering-Algorithm. The simulation demonstrates that the method not only removes excessive TM but also improves efficiency. More importantly, the designed sectors which follow the candidate boundary strategy reduce controller’s cognitive difficulty, this helps to keep controllers in as much clear-headed situation as possible to ensure flight safety.

关键词： air traffic management flexible airspace management airspace sector diffusion algorithm general clustering algorithm

Solving and Applying a Class of Block-diagonal Structured Large Linear Programming

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Systems Science and Systems Engineering 1998年第2期8卷 93-99页

作者： SHENG Jie Department of Mathematics, Teachers College, yangzhou University chenG Jieling Departemt of Irrigation, Agriculture College, yangzhou University chen Yixin Department of Computer Science, University of Science and Technology of China

Using large block diagonal structured linear problem as illustration, we present the "gradient simplex" method for solving large linear *** solving some large block diagonal structured linear problem with fewer coupling constrants, this method is much faster then the simplex method, and can surmount the capacity and speed restrictions of computer to certain *** this paper, we discuss the efficiency and applicability of the method and analysis its performance in the examples of economic development optimize programming model.

关键词： linear programming method

Leader-following Consensus of Switched Linear Multi-agent Systems Under Arbitrary Switching Signal

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Leader-following Consensus of Switched Linear Multi-agent Sy...

第40届中国控制会议

作者： yangzhou chen Bing chen Jingyuan Zhan College of Artificial Intelligence and Automation Beijing University of Technology Engineering Research Center of Digital Community Ministry of Education

This paper focuses on the leader-following consensus problem of multi-agent systems under both undirected and directed networks, where each agent is subject to the switched linear dynamics. It is assumed that the switching between the subsystems of the agents is arbitrary. We utilize the incidence matrix of a virtual directed spanning tree rooted at the leader to construct a linear transformation matrix so as to equivalently transform the leader-following consensus problem into the globally uniformly asymptotic stability（GUAS） problem of a switched linear system. Then, based on the common Lyapunov function method, we derive some sufficient conditions in terms of the linear matrix inequalities（LMIs） to assure the globally uniformly asymptotic consensus of the multi-agent system. Finally, some numerical examples are given to illustrate the effectiveness of the theoretical results.

关键词： Leader-following consensus switched linear dynamics directed spanning tree linear transformation LMIs

时变系统线性二次型问题:无约束条件时的一般结果和有控制能量约束条件时的讨论

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控制理论与应用 1999年第4期16卷 474-477页

作者：陈阳舟北京工业大学自动化系北京100022

本文中我们首先对无约束条件时的有限时间区间上时变系统线性二次型（FHLQ）问题进行了分类，并给出了问题属于每一类的充分必要条件（定理2）．其次证明了对于HLLQ问题其下确界有限与其可达是等价的（定理1）在此基础上给出了问题为正... 详细信息

本文中我们首先对无约束条件时的有限时间区间上时变系统线性二次型（FHLQ）问题进行了分类，并给出了问题属于每一类的充分必要条件（定理2）．其次证明了对于HLLQ问题其下确界有限与其可达是等价的（定理1）在此基础上给出了问题为正则的一些新的条件（定理3）．最后。

关键词：线性二次型问题时变系统约束条件

Event-triggered consensus control for multi-agent systems with Markov switching topologies

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Event-triggered consensus control for multi-agent systems wi...

第40届中国控制会议

作者： Shanglin Li yangzhou chen Jingyuan Zhan College of Artificial Intelligence and Automation Beijing University of Technology Engineering Research Center of Digital Community Ministry of Education Beijing Laboratory For Urban Mass Transit Beijing

This paper investigates the event-triggered consensus control problem for multi-agent systems with Markov switching topologies. By a linear transformation method, the mean-square consensus problem under event-triggered protocol is transformed into the mean-square stability problem subject to a certain constraint condition. Then by constructing Lyapunov function and employing the weak infinitesimal operator, the mode-dependent consensus controller gains are designed in terms of a bilinear matrix inequality. In order to write bilinear matrix inequality as a set of linear matrix inequalities, three kinds of iterative algorithms are developed. Finally, a simulation example is provided to verify the validity of the presented algorithms.

关键词： Event-triggered consensus Multi-agent systems Markov switching topologies Linear transformation

Robust Detection of Lighting LEDs by Analyzing the Geometric Structure of the Tunnel Interior Environment in Vehicle-Mounted Video Sequences

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Robust Detection of Lighting LEDs by Analyzing the Geometric...

第40届中国控制会议

作者： Le Xin Zeyu Shi yangzhou chen College of Artificial Intelligence and Automation Information DepartmentBeijing University of Technology College of Metropolitan Transportation Beijing University of Technology

Tunnel LED lighting system is an important infrastructure to ensure the safety and comfort of driving in highway *** this paper,an automatic robust detection of lighting LED lamps in highway tunnels based on vehicle-mounted video processing is *** analyzing the geometric structure of the interior road environment in tunnels,this method includes the following three ***,the front-vehicle vanishing point is detected by using the M-estimator sample and consensus（MSAC） algorithm,just with the set of significant parallel lines extracted using the LSD（Line Segment Detector） ***,after the dark region on the top of the tunnel is accurately segmented,an image segmentation algorithm based on adaptive threshold is adopted,realizing the LED lamp candidate region ***,this paper proposes post-processing methods to ensure the accurate detection of LED lamps in complex scenes with highlight-interference in the *** experimental results show that this method can robustly detect the LED lamps in the tunnel under complex conditions with high accuracy,which can meet the needs of efficient acceptance inspection and daily maintenance of tunnel LED lighting system.

关键词： Tunnel Lighting System Robust Detection of Lighting LEDs On-board Video Processing Front-vehicle Vanishing Point Adaptive Threshold Segmentation