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Model Predictive control system Based on FPGA and A Case Study

IFAC Proceedings Volumes 2011年第1期44卷 9266-9271页

作者： Nan Yang Dewei Li Jun Zhang Yugeng Xi Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education Shanghai 200240 Joint Institute of UMich-SJTU Shanghai Jiao Tong University Shanghai 200240 China

Abstract Model predictive control (MPC) algorithm has been widely applied in industry process control systems since last century, like petro-refining and other chemical processes. However, it is rarely used in field controllers due to the complexity of online optimization. This paper introduces a new MPC system based on the field programmable gate array (FPGA) chip. In order to make MPC controller more efficient, a hybrid way is adopted to design the quadratic programming (QP) solver on the FPGA chip. Thus, the controller can solve the optimization problem of MPC in a pretty short time. The whole control system is implemented on a Virtex-4 FPGA chip and applied to the angle servo control of two motors with a satisfactory result. The experiment shows that it is possible to apply MPC algorithm in field controller by the proposed design.

关键词： FPGA model predictive control field controller motor servo

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An effective document image deblurring algorithm

An effective document image deblurring algorithm

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Conference on Computer Vision and Pattern Recognition (CVPR)

作者： Xiaogang Chen Xiangjian He Jie Yang Qiang Wu Key Laboratory of System Control and Information Processing Ministry of Education China Institute of Image Processing and Pattern Recognition Shanghai Jiaotong University China Centre of Innovation in IT Services and Applications University of Technology Sydney Australia

Deblurring camera-based document image is an important task in digital document processing, since it can improve both the accuracy of optical character recognition systems and the visual quality of document images. Traditional deblurring algorithms have been proposed to work for natural-scene images. However the natural-scene images are not consistent with document images. In this paper, the distinct characteristics of document images are investigated. We propose a content-aware prior for document image deblurring. It is based on document image foreground segmentation. Besides, an upper-bound constraint combined with total variation based method is proposed to suppress the rings in the deblurred image. Comparing with the traditional general purpose deblurring methods, the proposed deblurring algorithm can produce more pleasing results on document images. Encouraging experimental results demonstrate the efficacy of the proposed method.

关键词： Image restoration Histograms TV Object segmentation Deconvolution Estimation Image segmentation

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Model and optimal transmission scheduling of Multi-Hop Multi-Channel WCL

Model and optimal transmission scheduling of Multi-Hop Multi...

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International Conference on Electrical and control Engineering (ICECE)

作者： Honghua Xu Yunhuan Li Lian Li Feilong Lin Xinping Guan School of Electronic Information and Electric Engineering Shanghai Jiao Tong University Shanghai China Key Laboratory of System Control and Information Processing Ministry of Education Shanghai China

The collaborative nature of industrial wireless network system (IWNS) brings several advantages over traditional wired industrial monitoring and control systems, while commercial products and real-world deployments of IWNS are faced with harsh reliability and predictability issues, which are mainly attributed to the unreliable nature of individual wireless link. In this paper, we research Multi-Hop Multi-Channel wireless communication link (WCL). We model Multi-Hop Multi-Channel WCL at first, and then we present a optimal transmission scheduling policy based on join allocation of slots and channels problem. Following that, we relax the problem into a Subprime solution which is suitable for engineering application. At last, we developed testbed and achieved expectation result that Multi Hop Multi-Channel employing our transmission scheduling policy improved reliability obviously.

关键词： Reliability Resource management Wireless communication Job shop scheduling Spread spectrum communication Schedules

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Distributed coordination for connectivity-preserving flocking without velocity measurement

Distributed coordination for connectivity-preserving flockin...

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Asian control Conference

作者： Lin Wang Xiaofan Wang Xiaoming Hu Department of Automation Key Laboratory of System Control and Information Processing Shanghai Jiaotong University Shanghai China Optimization and Systems Theory Royal Institute of Technology Stockholm Sweden

ISBN: (纸本)9781612844879

In this paper, we address the design of decentralized controller for connectivity-preserving flocking without velocity measurement. An output vector based on neighbors' position information alone is constructed to replace the role of velocity, then some bounded attractive and repulsive forces are integrated together to design the controller. Under some initial conditions, we prove that the controller not only can synchronize all agents, but also can avoid collision as well as preserving connectivity among agents for all the time. Moreover, a leader-follower method is used to guide the group to a desired direction, where the neighboring relationship is totally determined by the distance.

关键词： Algorithm design and analysis Velocity measurement Synchronization Symmetric matrices Lead Collision avoidance Position measurement

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Change detection based on iterative invariant area histogram matching

Change detection based on iterative invariant area histogram...

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International Conference on Geoinformatics

作者： Zhengwei Yang Wei Zhang Wei Wang Qiongcheng Xu NASS Research and Development Division USDA Fairfax VA USA Department of Automatic Control and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai Jiaotong University Shanghai China

ISBN: (纸本)9781612848495

Image radiometric distortion is problematic to many remote sensing based image change detection methods. Thus image radiometric normalization is critical to successful change detection and other image analysis. Histogram matching (HM) method has been widely used for radiometric normalization. However, when two corresponding image scenes have partial changes, these changes will introduce additional distortions in the histogram matching process. Obviously, if the change areas in the images can be excluded from histogram matching, the distortions in histogram matching will be avoided. Thus, a novel, iterative change detection based HM normalization algorithm is proposed in this paper. The algorithm of the proposed iterative invariant area histogram matching and an adaptive thresholding schema are first introduced, and the change detection experiment results are then presented. The preliminary results indicate that the proposed method significantly improves the performance of change detection for a given threshold as judged by visual inspection.

关键词： Iterative change detection Iterative radiometric normalization Histogram matching Invariant area

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A Distributed Inter-Cell Interference Coordination Scheme between Femtocells in LTE-Advanced Networks

A Distributed Inter-Cell Interference Coordination Scheme be...

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IEEE Conference on Vehicular Technology (VTC)

作者： Fanglong Hu Kan Zheng Lei Lei Wenbo Wang Wireless Signal Processing and Network Lab Key laboratory of Universal Wireless Communication Ministry of Education Beijing University of Posts and Telecommunications Beijing China Wireless System Laboratory China Mobile Research Institute Beijing China

Due to the dense and self-deployment of home eNodeBs (HeNBs) in femtocells, serious inter-cell interference may arise without good coordination. To deal with it, a distributed interference coordination scheme for femtocells networks with carrier aggregation (CA) is proposed in this paper. Firstly, each femtocell operates on all the component carriers (CCs) of the network and gathers the information needed via local measurements. Then, based on the measurements, decisions of maintaining or releasing the component carrier are individually made by each femtocell on each component carrier. Simulation results validate the effectiveness of our proposed scheme in term of the signal to interference and noise ratio (SINR) and throughput.

关键词： Interference Throughput Femtocells signal to noise ratio Wireless communication Simulation Femtocell networks

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RETRACTED ARTICLE: Improved particle swarm optimization algorithm with application in optimal reactive power planning of 10kV distribution system

RETRACTED ARTICLE: Improved particle swarm optimization algo...

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2011 7th International Conference on Natural Computation, ICNC 2011

作者： Wang, Chao Yao, Gang Zhou, Lidan Wang, Xin Zheng, Yihui Xu, Qingshan Center of Electrical and Electronic Technology Shanghai Jiao Tong University Shanghai 200240 China Department of Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China Key Laboratory of System Control and Information Processing Ministry of Education Shanghai 200240 China JiLin Electric Power Co. Ltd. JiLin 130021 China

ISBN: (纸本)9781424499533

The optimization of reactive power compensation plays an important role in power system planning and designing. A mathematical model in the 10kV distribution network will be established in this paper. Its objective function is the cost of investment in equipment of reactive power compensation and active power loss of the system should be the least. The node voltages beyond limited and the generator reactive power output beyond limited will be expressed in the way of penalty function. In this paper, the improved particle swarm optimization (improved PSO) will be used to solve the problem of easily falling into local optimum if using PSO. Using the improved PSO can be more effective in searching the global optimal solution, the speed of reactive power optimization will be improved too. The algorithm can better adapt to solve the problem. © 2011 IEEE.

关键词： Particle swarm optimization (PSO)

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Quantized Consensus for Agents on Digraphs

Quantized Consensus for Agents on Digraphs

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2011 Eighth International Conference on Fuzzy system and Knowledge Discovery(第八届模糊系统与知识发现国际会议 FSKD 2011)

作者： DequanLi QipengLiu Xiaofan Wang Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai 200240 Shanghai P.R.China

The available investigations about quantized average consensus typically assume agents be confined to evolve on balanced digraphs via quantized information exchange, thus the corresponding update matrices are doubly stochastic, which is very restrictive and brings about feasibility problem in practical applications. By dropping the doubly stochastic constraint for the update matrices, this paper studies the consensus seeking for a group of agents on general strongly connected digraphs, where agents' states are communicated (may be unidirectional) through logarithmic quantizer. Under mild assumptions on network topology, we derive an upper bound for the quantization precision to guarantee the weighted average preservation of the whole network.

关键词： consensus distributed algorithm multiagent systems quantization nonbalanced digraph

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Eigenvalue-based investigation of multi-agent system with logical dynamics

Eigenvalue-based investigation of multi-agent system with lo...

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World Congress on Intelligent control and Automation (WCICA)

作者： Lin Wang Xiaofan Wang Jinhuan Wang Department of Automation and Key Laboratory of System Control and Information Processing Ministry of Education Shanghai Jiaotong University Shanghai China School of Sciences Hebei University of Technology Tianjin China

In this paper, we study the limit set of multi-agent logical system via an algebraic method. We first show that such system can be converted into a linear system through an expansion of space. Then, we discuss the structure properties of system matrix and investigate the relationship between the eigenvalues and the limit set. As an application, the nilpotent problem of elementary cellular automata(ECA) known as algorithmically undecidable is considered, and all the nilpotent ECA are found out which consists of rules 0, 8, 64, 239, 253, 255.

关键词： Eigenvalues and eigenfunctions Automata Vectors Multiagent systems Manganese Matrix converters Linear systems

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Dynamic anti-windup design in anticipation of actuator saturation

Dynamic anti-windup design in anticipation of actuator satur...

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作者： Wu, Xiongjun Lin, Zongli Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing of Ministry of Education Shanghai 200240 China Charles L. Brown Department of Electrical and Computer Engineering University of Virginia P.O. Box 400743 Charlottesville VA 22904-4743 United States

ISBN: (纸本)9781457700804

In a traditional anti-windup design, the anti-windup mechanism is set to be activated as soon as the control signal saturates the actuator. A recent innovation of delaying the activation of the anti-windup mechanism, both static and dynamic, until the saturation reaches to a certain level of severity has led to a performance improvement of the resulting closed-loop system. More recently, it has been shown that significant further performance improvements can be obtained by activating a static anti-windup mechanism in anticipation of actuator saturation, in comparison with the delayed activation design. This paper demonstrates that anticipatory activation of a dynamic anti-windup mechanism would also lead to significant performance improvements over both the immediate and delayed activation schemes. © 2011 AACC American Automatic control Council.

关键词： Chemical activation

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