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IEEE Vehicular Technology Conference

作者： Shumin Bi Cailian Chen Rong Du Xinping Guan Key Laboratory of System Control and Information Processing Ministry of Education of China and Department of Automation Shanghai Jiao Tong University

ISBN: (纸本)9781479944484

There are currently several ways of wireless access to support vehicular communication, including vehicular ad-hoc networks (VANETs) and cellular networks (off-the-shelf 3G and LTE). It is necessary to make a seamless handover decision to guarantee quality of service (QoS) of communications for a vehicle moving in the regions covered by more than one access networks. In this paper, we provide a performance guaranteed optimized handover decision algorithm. With this algorithm, the communication of vehicles can handover through heterogeneous wireless access networks not only to reach overall load balance among all access points, but also to maximize the data rate of the whole networks as well as the vehicles' fairness. In addition, in the process of decision making, the data rate of handover vehicles is estimated. Simulations are performed to demonstrate the efficiency of the proposed algorithm.

关键词： Vehicles Handover Internet Wireless communication Optimization Roads

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Switched topology control and negotiation of distributed self-healing for mobile robot formation

Communications in Computer and Information Science

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Communications in Computer and information Science 2014年 462卷 562-574页

作者： Ju, Jianjun Liu, Zhe Chen, Weidong Wang, Jingchuan Department of Automation Shanghai Jiao Tong University China Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai200240 China

ISBN: (纸本)9783662452608

In this paper, we investigate robot failure problem in mobile robot formation. A recursive and distributed self-healing algorithm is proposed to restore network topology when one or more robots fail. Firstly, a switched topology control method is introduced to restore the synchronization and connectivity of mobile robot network recursively. Then, a negotiation mechanism is further presented which achieves individual control in switched topology process. This mechanism only needs local information interactions between neighbors. Finally, the effectiveness of the proposed algorithm is validated by results of both simulations and real experiments. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Mobile robots

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On string languages generated by sequential spiking neural P systems based on maximum spike number 1

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13th International Conference on Unconventional Computation and Natural Computation, UCNC 2014

作者： Jiang, Keqin Zhang, Yuzhou Pan, Linqiang Key Laboratory of Image Information Processing and Intelligent Control School of Automation Huazhong University of Science and Technology Wuhan 430074 Hubei China School of Computer and Information Anqing Normal University Anqing 246133 Anhui China

ISBN: (数字)9783319081236

ISBN: (纸本)9783319081229

Spiking neural P systems (SN P systems, for short) are a class of distributed parallel computing devices inspired from the way neurons communicate by means of spikes. In this work, we consider SN P systems with the restriction: at each step the neuron with the maximum number of spikes among the neurons that can spike will fire (if there is a tie for the maximum number of spikes stored in the active neurons, only one of the neurons containing the maximum is chosen non-deterministically). We investigate the computational power of such sequential SN P systems that are used as language generators. We prove that recursively enumerable languages can be characterized as projections of inverse-morphic images of languages generated by that sequential SN P systems. The relationships of the languages generated by these sequential SN P systems with finite and regular languages are also investigated. © 2014 Springer International Publishing Switzerland.

关键词： Neurons

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A multi-step robust model predictive control scheme for polytopic uncertain multi-input systems

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IFAC Proceedings Volumes 2014年第3期47卷 8540-8545页

作者： Langwen Zhang Jingcheng Wang Bohui Wang Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai 200240 Tel: 86-21-34205374

Model predictive control (MPC) has attracted wide attention in process industries with its ability to handle constrained multivariable processes. Computational complexity can become a limiting factor when MPC is applied to large-scale systems with fast sampling times. In this paper, a control scheme known as multi-step robust MPC is presented for polytopic uncertain multi-input systems. Only one or several state feedback laws are optimized at each time interval to reduce computational complexity. A set invariance condition for polytopic uncertain systems is identified and the invariant set is determined by solving a linear matrix inequality (LMI) optimization problem. Based on the set invariance condition, a min-max multi-step robust MPC scheme is proposed. Numerical simulations show the effectiveness of the proposed scheme.

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Pulse repetition frequency design for geosynchronous SAR in ellipcial orbit

Pulse repetition frequency design for geosynchronous SAR in ...

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IET International Radar Conference 2015

作者： Wei Yin Wenfu Yang Zegang Ding Wei Liu Qingjun Zhang Jingjing Ren Beijing Key Laboratory of Embedded Real-time Information Processing Technology Radar Research Lab Beijing Institute of Technology Beijing P.R. China 100081 China Academy of Launch Vehicle Technology Beijing P.R. China 100076 Beijing Institute of Spacecraft System Engineering CAST Beijing P.R. China 100094

Elliptical orbit and squint mode are widely used in the system design of geosynchronous synthetics aperture radar (GEO SAR) to improve the coverage performance. In this paper, the effects of orbit height variation and squint mode to pulse repetition frequency (PRF) design are analyzed. The orbit height variation causes the variation of nadir interference and beam illumination region, and squint mode produces large range cell migration (RCM). These can induce invalidations of the designed PRF. Based on this, the constraints of nadir interference and transmit interference are updated for GEO SAR, and the effective time for the designed PRF is derived. PRF number required for imaging in one orbital period is analyzed.

关键词： Pulse repetition frequency (PRF) effective time nadir interference orbit height variation range cell migration (RCM) effective time PULSE REPETITION RATE Prolactin-Releasing Hormone Strabismus Orbits Synthetic aperture radar Rescue Specific absorption rate SAFETY ANALYSIS REPORTS Eye Sockets Genetically engineered organisms

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Multi-time Scale Hierarchical Predictive control for Energy Management of Microgrid system with Smart Users

Multi-time Scale Hierarchical Predictive Control for Energy ...

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第26届中国控制与决策会议

作者： Jun Xu Yuanyuan Zou Yugang Niu Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of EducationEast China Univ.of Science and Technology Key Laboratory of System Control and Information Processing Ministry of Education

In this paper, a multi-time scale hierarchal model predictive control strategy is proposed to optimize energy management problem of a microgrid with multiple smart users. According to the power flow among different energy modules, a hierarchical system model and a multi-time scale hierarchal energy optimization management problem are established. The centralized controller in the upper layer is to optimize the charge/discharge time and energy of storage devices, controllable supply power adjustment and dispatch of the aggregators. The optimization problem in the lower layer is to meet users' demands in real time. Meanwhile, in order to improve the disturbances caused by the randomness of renewable energy and variant loads, a multi-time scale optimization scheme is applied. At the slow scale, the upper optimization problem is solved, and the optimal energy scheduling in the long-term can be achieved. At the fast scale, the energy balance between supply and demand of smart users can be realized in the short-term. Finally, simulation results illustrate the effectiveness of proposed method.

关键词： Smart user,Microgrid,Energy management,Multi-time scale time-hierarchal,Model predictive control

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The vibration control of flexible manipulators based on model predictive control method

The vibration control of flexible manipulators based on mode...

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Chinese control Conference (CCC)

作者： Xiaoying Zhang Dewei Li Yugeng Xi Key Laboratory of System Control and Information Processing Ministry of Education Shanghai China Shanghai Jiao Tong University Shanghai China

This paper proposes a hierarchical control structure based on model predictive control to address the vibration suppression of flexible manipulators under the dynamic constraints. Due to the coupling relationship between the trajectory and the flexible vibration, it provides a solution to vibration reduction if the trajectory can be rationally planned. In the decision layer, an optimal reference trajectory is planned with consideration of the dynamic constraints to ensure the manipulator to locate at the desired position as soon as possible and the reduced flexible vibration is suppressed during the movement. In the execution layer, the tracking controller is designed to minimize a quadratic performance index of the prediction error. Simulations for a single-link flexible manipulator are performed to validate the proposed controllers.

关键词： Manipulator dynamics Vibrations Trajectory Torque Predictive models Vectors

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Topic identification strategy for English academic resources

Topic identification strategy for English academic resources

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5th FTRA International Conference on Computer Science and its Applications, CSA 2013

作者： Li, Huang Qing, Hu Xin, Xiong Lijun, Hua College of Computer Science and Technology Wuhan University of Science and Technology Wuhan 430080 China Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System Wuhan 430080 China

ISBN: (纸本)9783642416736

The network resource grows up exponentially with the rapid development of Internet. It is very important to identify whether the resources belong to the professional field or not. However, resources in professional field are sorted up mostly manually at present, and some drawbacks exist in the process. To tackle with these problems, the Topic Identification Strategy of Academic Resources proposes topic identification method based on the main text of resources. The strategy first transfers different forms of academic resources into a unified format. And then break up the whole text into parts to calculate the topic degree of relevance. Samples are used to decide the weight of the thresholds. The proposed method could also add labels for resources automatically. Experiments show that, this strategy could effectively deal with English academic resources topic identification. © 2014 Springer-Verlag Berlin Heidelberg.

关键词： Data mining

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Trajectory Tracking of Hard Rock Tunnel Boring Machine with Cascade control Structure

Trajectory Tracking of Hard Rock Tunnel Boring Machine with ...

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2014中国制导、导航与控制学术会议

作者： Huajiang Liu Jingcheng Wang Langwen Zhang Guanglei Zhao Department of Automation Shanghai Jiao Tong Universityand Key Laboratory of System Control and Information ProcessingMinistry of Education of ChinaShanghai 200240

ISBN: (纸本)9781479946983

In this paper,trajectory tracking control of hard rock Tunnel Boring Machine (TBM) is studied with a cascade control *** TBM thrust hydraulic system can adjust position and orientation during tunnel *** model of thrust hydraulic system and the compound control technique of thrust hydraulic system are *** order to realize trajectory tracking control,the dynamic model of TBM has been *** model provides a foundation for the trajectory tracking control of TBM *** and orientation controller of TBM have been designed and the controller calculates the force of thrust hydraulic *** compound controller of thrust hydraulic system produces the designed *** effectiveness of the proposed methods is shown by illustrative example.

关键词： boring machines cascade control construction equipment control system synthesis force control trajectory control TBM orientation TBM position TBM thrust hydraulic system cascade control structure compound control technique controller design hard rock tunnel boring machine trajectory tracking Equations Force Mathematical model Rocks Trajectory Valves

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Constrained Distributed MPC for LPV systems with Actuator Saturation and State Delay

Constrained Distributed MPC for LPV Systems with Actuator Sa...

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American control Conference

作者： Langwen Zhang Jingcheng Wang Yang Ge Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai 200240

ISBN: (纸本)9781479932757

In this work, a new approach to design constrained distributed MPC is proposed for linear parameter varying (LPV) systems subject to saturating actuator and state delay. Polytopic type uncertainty and only one state delay are considered in this paper. The algorithm requires decomposing the whole system into M subsystems and solving M linear matrix inequality (LMI) optimization problems for each subsystem. An iterative online algorithm for constrained distributed MPC is developed to coordinate the distributed controllers. The algorithm is a flexible structure of robust control, which allows the independent computation of the state feedback laws for the subsystems. A numerical example is simulated to show the effectiveness of the constrained distributed MPC algorithm.

关键词： Distribute Flexible structures SUB-system Robust control actuators

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