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Finite-State Markov Modeling of Tunnel Channels in Communication-based Train control (CBTC) systems

Finite-State Markov Modeling of Tunnel Channels in Communica...

引用

IEEE International Conference on Communications

作者： Hongwei Wang F. Richard Yu Li Zhu Tao Tang Bin Ning State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University P.R. China Department of Systems and Computer Engineering Carleton University Ottawa ON Canada

Communication-based train control (CBTC) is gradually adopted in urban rail transit systems, as it can significantly enhance railway network efficiency, safety and capacity. Since CBTC systems are mostly deployed in underground tunnels and trains move in high speed, building a train-ground wireless communication system for CBTC is a challenging task. Modeling the tunnel channels is very important to design and evaluate the performance of CBTC systems. Most of existing works on channel modeling do not consider the unique characteristics in CBTC systems, such as high mobility speed, deterministic moving direction, and accurate train location information. In this paper, we develop a finite state Markov channel (FSMC) model for tunnel channels in CBTC systems. The proposed FSMC model is based on real field CBTC channel measurements obtained from a business operating subway line. Unlike most existing channel models, which are not related to specific locations, the proposed FSMC channel model takes train locations into account to have a more accurate channel model. The distance between the transmitter and the receiver is divided into intervals, and an FSMC model is applied in each interval. The accuracy of the proposed FSMC model is illustrated by the simulation results generated from the model and the real field measurement results.

关键词： Signal to noise ratio Antenna measurements Markov processes Wireless communication Receivers Rails Channel models

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A Delay Tolerant control Scheme for Communication-based Train control (CBTC) systems with Unreliable Wireless Networks

A Delay Tolerant Control Scheme for Communication-based Trai...

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IEEE International Conference on Communications

作者： Bing Bu F. Richard Yu Tao Tang Chunhai Gao State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University P.R. China Department of Systems and Computer Engineering Carleton University Ottawa ON Canada

Random transmission delays and packet drops are inevitable in communication-based train control (CBTC) systems, which could result in unnecessary traction, brake or even emergency brake of trains, losses of line capacity and passenger satisfaction. In this paper, we study the transmission delays in CBTC systems, analyze their impacts on the performances of CBTC systems, and propose a novel scheme to improve the performances of trains' control system in CBTC by mitigating the impacts. Unlike the existing works that only consider a single train, we consider a group of trains in CBTC systems to improve the CBTC performances. Extensive simulation results are presented. We show that the current adopted control scheme experiences obvious performance losses under transmission delays. By contrast, our proposed scheme is tolerant of transmission delays, and can significantly improve the CBTC performances.

关键词： Delays Wireless networks Uplink Actuators Acceleration Rails

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A proposed generalized mean single multiplicative neuron model

A proposed generalized mean single multiplicative neuron mod...

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2012 IEEE 8th International Conference on Intelligent computer Communication and Processing, ICCP 2012

作者： Attia, Mohamed A. Sallam, Elsayed A. Fahmy, Mahmoud M. Department of Computer and Automatic Control Faculty of Engineering Tanta University Tanta Egypt

ISBN: (纸本)9781467329514

This paper presents a single multiplicative neuron model based on a polynomial architecture. The proposed neuron model consists of a non-linear aggregation function based on the concept of generalized mean of all multiplicative inputs. This neuron model has the same number of parameters as the single multiplicative neuron model (SMN). The SMN model is a special case of the proposed generalized mean single multiplicative neuron (GMSMN) model. The structure of this model is simpler than higher-order neuron model. The simulation results show that the performance of the proposed neuron model is better than SMN model. © 2012 IEEE.

关键词： Neurons

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Multivariable PID controllers for dynamic process

Multivariable PID controllers for dynamic process

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Asian control Conference

作者： M.C. Razali N. A. Wahab P. Balaguer M. F. Rahmat S. I. Samsudin Department of Control and Mechatronics Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia Skudai Malaysia Department of Industrial Systems and Design Universitat Jaume I de Castello Spain Department of Industrial Electronic Faculty of Electronics and Computer Engineering Universiti Teknikal Malaysia Melaka Durian Tunggal Malaysia

ISBN: (纸本)9781467357661

This paper is concerned with the design of a dynamic multivariable PID control for multi input multi output (MIMO) process. Four multivariable PID control schemes using Davison, Penttinen-Koivo, Maciejowski and a combined method were applied. The controller parameters for all control strategies were designed based on dynamic condition using singularly perturbed system. The purpose of the study is to investigate the effectiveness in the performance of dynamic control based on different multivariable PID control strategies. To attain the best result, numerous tuning parameters were tested. The simulation results show the significance of the study whereby the proposed dynamic MPID control scheme shows better improvement in control tuning of nonlinear system.

关键词： Process control Substrates Tuning PD control MIMO Wastewater treatment

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Observer-based stabilization of uncertain linear systems with recycle: An LMI approach

Observer-based stabilization of uncertain linear systems wit...

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European control Conference (ECC)

作者： Miguel Parada Daniel Sbarbaro Renato A. Borges Pedro L. D. Peres Control Systems Group of the Technische Universität Berlin Berlin Germany Department of Electrical Engineering Universidad de Concepcion Concepcion Chile Department of Electrical Engineering University of Brasilia - UnB Brasilia-DF Brazil School of Electrical and Computer Engineering University of Campinas SP Brazil

ISBN: (纸本)9781479901890

This paper deals with the control of processes having recycle streams. These processes can be modeled as state delayed systems. In this work the problem of robust design of an observed-based controller for these systems is presented. The system is assumed to have norm-bounded uncertainties which are independent in every matrix involved in its state space realization. To ensure asymptotic stability of the closed loop system, a Lyapunov functional is used to obtain delay-independent design conditions. The controller design is accomplished by means of a convex optimization procedure formulated using linear matrix inequalities (LMIs). Numerical examples are provided to illustrate the main characteristics of the proposed design method.

关键词： Recycling Linear matrix inequalities Uncertainty Symmetric matrices Vectors Observers Process control

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Highly flexible self-reconfigurable systems for rapid layout formation to offer manufacturing services

Highly flexible self-reconfigurable systems for rapid layout...

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IEEE International Conference on systems, Man, and Cybernetics

作者： Victor M. Cedeno-Campos Paul A. Trodden Tony J. Dodd Jim Heley Department of Automatic Control and Systems Engineering University of Sheffield Mappin Street Sheffield UK AMRC with Boeing. Factory of the Future. Advanced Manufacturing Park Wallis Way Catcliffe Rotherham S60 5TZ UK

ISBN: (纸本)9781479906505

Due to the changing trend in manufacturing field from mass production to mass customization it is important to offer new products at low cost and fast time to market to keep competitive. This paper addresses the problem of manufacturing services with fast production time, for multiple products and capacity for low and high production volumes. To provide these services, a novel framework, INTREPID, is proposed based on the idea of Self-Reconfigurable Manufacturing systems (S-RMS). A factory that facilitates manufacturing layout reconfiguration and mobile production resources that can self-reconfigure depending on the product is proposed. The full scope of this framework is to provide global services through the cloud and a public manufacturing network. This will allow production in any country without huge investment for entities like SMEs, startups and even entrepreneurships.

关键词： Reconfigurable manufacturing systems production layout self-reconfiguration service-oriented manufacturing cloud manufacturing fast time to market customized make-to-order products robots self-organization robotic mobile manipulator Mass production Legal Services layouts Reconfigurable manufacturing manufacturing SUPERCONDUCTING MAGNETIC ENERGY STORAGE New products

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On the achievable capacity of dual-polarized antenna systems in 3D indoor scenarios

On the achievable capacity of dual-polarized antenna systems...

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IEEE International Conference on Communications in China (ICCC)

作者： Fengxiang Wang Xiang Cheng Liuqing Yang Bo Yu Bingli Jiao School of Electronics Engineering & Computer Science Peking University Beijing China State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China Department of Electrical and Computer Engineering Colorado State University Fort Collins CO USA

Unlike triple-polarized antennas, dual-polarized antennas can be easily implemented into thickness limited devices and thus have received much attention recently. Dual-polarized antennas have the potential to double the channel capacity in comparison with an omnidirectional single-input single-output (SISO) system. However, in real three-dimensional (3D) scenarios, dual-polarized antennas cannot capture the arriving power from the third polarization direction, which is orthogonal to the two-dimensional (2D) polarization plane. This will lead to power loss, which may significantly affect the resultant channel capacity. By proposing a novel two-sphere single-bounced geometry-based stochastic model (GBSM) and rigorously analyzing the change of polarization after single-bounced scattering, this paper studies the impact of the power loss on the channel capacity and specifies the conditions under which the channel capacity of dual-polarized systems is even worse than that of omnidirectional SISO systems. Not only that this is the first endeavor on this subject, but also this work is of practical importance in guiding appropriate deployment of dual-polarized antennas in real 3D indoor scenarios.

关键词： Three-dimensional displays Antennas Channel capacity Vectors Signal to noise ratio Correlation Azimuth

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Bilateral Teleoperation of Flexible-Joint Manipulators with Dynamic Gravity Compensation and Variable Time-Delays

Bilateral Teleoperation of Flexible-Joint Manipulators with ...

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IEEE/RSJ International Conference on Intelligent Robots and systems

作者： Emmanuel Nuno Daniela Valle Ioannis Sarras Luis Basanez Department of Computer Science at the University of Guadalajara (UdG). Guadalajara Mexico Electronics Department at the University of Guadalajara (UdG). Guadalajara Mexico IFP Energies Nouvelles. Department of Control Signal & Systems. Paris France Institute of Industrial and Control Engineering (IOC) at the Technical University of Catalonia (UPC). Barcelona Spain

ISBN: (纸本)9781467363563

It is widely known that the problem of controlling a rigid bilateral teleoperator with time-delays has been effectively addressed since the late 80's. However, the control of flexible joint manipulators in a bilateral teleoperation scenario, with dynamic gravity compensation, remains an open problem. This work aims at filling this gap by presenting a new controller for bilateral teleoperators composed of a rigid local manipulator and a flexible-joint remote manipulator with dynamic gravity compensation and asymmetric variable time-delays in the communication channel. In order to dynamically compensate the gravity term, in the flexible joint manipulator, a change of coordinates which accounts for the joint and link gravity position drift is used. The rest of the controller is a simple PD scheme. Assuming that the human operator and the environment define passive maps from velocity to force, it is proved that velocities and local and remote position errors are bounded. Additionally, if the human operator and remote environment forces are zero then velocities asymptotically converge to zero and position tracking is established. Some simulations are presented in order to show the performance of the proposed controllers.

关键词： remote operation Manipulators controllers compensated Flexible connections Change of coordinates location error Location tracking

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On the limit behavior for multi-agent dynamical systems

On the limit behavior for multi-agent dynamical systems

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3rd IFAC Workshop on Navigation, Guidance and control of Underwater Vehicles, NGCUV 2012

作者： Prodan, Ionela Bitsoris, Georges Olaru, Sorin Stoica, Cristina Niculescu, Silviu-Iulian Automatic Control Department France CNRS-SUPELEC Laboratory of Signal and Systems France Control Systems Laboratory Electrical Engineering Department University of Patras Greece

ISBN: (纸本)9783902823199

This paper addresses the optimal control of multiple linear agents in the presence of a set of adversary constraints. This type of constraints makes the convergence of the agents' dynamics towards the "natural" equilibrium position, impossible to fulfill. Therefore, this default equilibrium point has to be replaced by a set of equilibrium points or even accept the existence of limit cycles. Furthermore, the constraints introduced in the transitory optimization problem are non convex. The present paper proposes a dual-mode control strategy which switches between an unconstrained optimum controller and a constrained control law whenever the adversary constraints are activated. The proposed method builds on invariance concepts and proves to be related to eigenstructure assignment problems. The technique exhibits effective performance and is validated here by an illustrative example.

关键词： Multi agent systems

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Single intersection signal control based on Type-2 fuzzy logic

Single intersection signal control based on Type-2 fuzzy log...

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IEEE Symposium on Computational Intelligence in Vehicles and Transportation systems (CIVTS)

作者： Yunrui Bi Dipti Srinivasan Xiaobo Lu Zhe Sun Southeast University Nanjing Jiangsu CN Department of Electrical & Computer Engineering National University of Singapore Singapore School of Automation Southeast University Nanjing China National Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou China

Single intersection is generally regarded as the elementary unit for solving traffic problem. A Type-2 fuzzy logic controller (T2FLC) for single intersection signal control is presented in this paper as Type-2 fuzzy logic can handle the imprecision, uncertainties and vagueness lying in the dynamic process more efficiently. Furthermore, the membership function parameters of Type-2 fuzzy logic controller are optimized by genetic algorithm (GA). Simulation experiments are designed to compare the queue length and vehicular average delay of Type-2 fuzzy control optimized by GA with general Type-2 fuzzy control, Type-1 fuzzy control and fixed-time control under various types of vehicle arrival rate. Experimental results indicate that our proposed control method can reduce the queue length and vehicular delay at the intersection effectively and thus demonstrates its superiority.

关键词： Vehicles Fuzzy logic Genetic algorithms Delays Optimization Junctions Educational institutions

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