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第23届过程控制会议

作者： HaoYuchun Li Qiang Tan Wen Li Donghai School of Control & Computer Engineering North China Electric Power University Beijing 102206 Chi State Key Lab of Power Systems Dept. of Thermal Engineering Tsinghua University Beijing 100084 C

An expansion procedure to design partially decentralized controllers via model predictive control is proposed in this paper. Partially decentralized control is a control structure that lies between a fully decentralized structure and a fully centralized one, and has the advantage of achieving comparable performance as a fully centralized controller but with simpler structure. The proposed method follows the expansion method proposed in a previous paper where internal model control (IMC) was used to design controllers for non-square subsystems. The method requires computing the pseudo-inverse of a non-square matrix via pseudo-inverse factors. Instead, the proposed method will use dynamic model control (DMC) to design PID controllers for non-square sub-systems without using additional factors. Simulation results show that the proposed method is simple and can achieve better performance than fully decentralized control.

关键词： Partially decentralized control Non-square system Model predictive control Internal model control

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Design of Partially Decentralized controllers via GPC

Design of Partially Decentralized Controllers via GPC

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中国自动化学会第二十七届青年学术年会

作者： HAO Yuchun TAN Wen LI Donghai School of Control & Computer Engineering North China Electric Power University Beijing 102206 Chi State Key Lab of Power Systems Dept. of Thermal Engineering Tsinghua University Beijing 100084 C

Partially decentralized control is a control structure that lies between a fully decentralized structure and a fullycentralized one, and has the advantage of achieving comparable performance as a fully centralized controller but with simplerstructure. This paper proposes an expansion procedure to design partially decentralized controllers via generalized predictivecontrol (GPC). The proposed method does not need to compute the pseudo-inverse of a non-square system thus overcomes thedrawbacks of the existing expansion method proposed in a previous paper. Simulation results show that the proposed method issimple and can achieve better performance than the previous method.

关键词： Partially decentralized control Non-square system Generalized predictive control Internal model control

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Adaptive backstepping control of multi-model switching for the hydraulic servo position system of a rolling mill

Beijing Keji Daxue Xuebao/Journal of University of Science a...

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Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing 2012年第11期34卷 1346-1351页

作者： Shao, Peng-Zhen Fang, Yi-Ming Wang, Wen-Bin Jiao, Zong-Xia Hebei Key Lab. of Industrial Computer Control Engineering Yanshan University Qinhuangdao 066004 China School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China

To deal with the structure jumping problem resulting from elastic load force and external load force jumping in different working conditions, an adaptive backstepping control method of multi-model switching was presented based on the common Lyapunov function method and the adaptive backstepping method. This approach combines the features of adaptive backstepping control and the design requirements of a common Lyapunov function, and the adaptive controller for every sub-system and the parameter adaptive estimators for the uncertainty upper bound are designed by backstepping control, then taking the Lyapunov function designed by backstepping as a common Lyapunov function to ensure that the system is asymptotically stable under arbitrary switching. It is easy to select the common Lyapunov function by the combination of backstepping and the common Lyapunov function method, and the problem of parameter jumping and parameter slow time-varying existing at the same time is solved. Simulation results demonstrate that the designed controllers can ensure not only good dynamic and static performance for the hydraulic servo position system of a rolling mill, but also good robustness for the system parameter jumping and parameter slow time-varying.

关键词： Backstepping

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Iterative learning control for nonlinear systems with uncertain state delay and arbitrary initial error

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控制理论与应用（英文版） 2011年第4期9卷 541-547页

作者： Hongbin WANG Yan WANG Key Laboratory of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao Hebei 066004 China

Most of the existing iterative learning control algorithms proposed for time-delay systems are based on the condition that the time-delay is precisely available, and the initial state is reset to the desired one or a fixed value at the start of each operation, which makes great limitation on the practical application of corresponding results. In this paper, a new iterative learning control algorithm is studied for a class of nonlinear system with uncertain state delay and arbitrary initial error. This algorithm needs to know only the boundary estimation of the state delay, and the initial state is updated, while the convergence of the system is guaranteed. Without state disturbance and output measurement noise, the system output will strictly track the desired trajectory after successive iteration. Furthermore, in the presence of state disturbance and measurement noise, the tracking error will be bounded uniformly. The convergence is strictly proved mathematically, and sufficient conditions are obtained. A numerical example is shown to demonstrate the effectiveness of the proposed approach.

关键词： Iterative learning control State-delay system Initial condition Uncertain disturbances

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Fault search based on grey fuzzy multi-attribute decision-making

Fault search based on grey fuzzy multi-attribute decision-ma...

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2011 International Conference on Fluid Power and Mechatronics, FPM 2011

作者： Yao, Chengyu Dang, Zhen Chen, Dongning Lv, Shijun Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao China

ISBN: (纸本)9781424484522

In order to overcome the characteristics of uncertainty and incomplete information of fault attribute in searching for fault, a new fault search method based on the fault tree and grey fuzzy multi-attribute decision-making is proposed in this paper. Firstly, utilizing fault tree analysis (FTA) method to determine the initial fault alternative, fault probability and search cost of the fault alternative are considered as fault attributes simultaneously, the attribute value of fault alternative is described as grey fuzzy numbers, calculating the attribute weight by the information entropy method. Then, the grey relational grade between the fault alternative and the ideal alternative is calculated base on grey relational analysis method, and relative closeness of fault alternative is achieved. Finally, according to the relative closeness determine the search order of all fault alternatives. An engineering example of the hydraulic suspension system of a certain type truck is adopted to demonstrate the feasibility and accuracy of the proposed method. © 2011 IEEE.

关键词： Fault tree analysis

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Period distribution analysis of some linear maps

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Communications in Nonlinear Science and Numerical Simulation 2012年第10期17卷 3848-3856页

作者： Fei Chen Xiaofeng Liao Kwok-wo Wong Qi Han Yang Li State Key Lab. of Power Transmission Equipment and System Security College of Computer Science Chongqing University Chongqing 400044 PR China Department of Electronic Engineering City University of Hong Kong Hong Kong PR China Department of Automatic Control and Systems Engineering The University of Sheffield UK

This paper discusses period properties of some linear maps which are employed in various applications such as image encryption, public key cryptography and watermarking. Conditions for the bijectiveness of such maps and the existence of a period are presented. Period structure is also given. Then, the recurrence equation theory is adopted to address the period distribution problem. Finally, a framework to solve the problem is proposed with a demonstration of its effectiveness and efficiency into some applications.

关键词： Linear map Period distribution Periodic orbit Dynamical system Cat map

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Cost-effective barrier coverage by mobile sensor networks

Cost-effective barrier coverage by mobile sensor networks

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IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： Shibo He Jiming Chen Xu Li Xuemin Shen Youxian Sun State Key Laboratory of Industrial Control Technology University of Zhejiang China Department of Electrical and Computer Engineering University of Waterloo Canada INRIA Lille-Nord Europe USTL CNRS UMR 8022 LIFL Universite Lille-Nord de France France

ISBN: (纸本)9781467307734

Barrier coverage problem in emerging mobile sensor networks has been an interesting research issue. Existing solutions to this problem aim to decide one-time movement for individual sensors to construct as many barriers as possible, which may not work well when there are no sufficient sensors to form a single barrier. In this paper, we try to achieve barrier coverage in sensor scarcity case by dynamic sensor patrolling. In specific, we design a periodic monitoring scheduling (PMS) algorithm in which each point along the barrier line is monitored periodically by mobile sensors. Based on the insight from PMS, we then propose a coordinated sensor patrolling (CSP) algorithm to further improve the barrier coverage, where each sensor's current movement strategy is decided based on the past intruder arrival information. By jointly exploiting sensor mobility and intruder arrival information, CSP is able to significantly enhance barrier coverage. We prove that the total distance that the sensors move during each time slot in CSP is the minimum. Considering the decentralized nature of mobile sensor networks, we further introduce two distributed versions of CSP: S-DCSP and G-DCSP. Through extensive simulations, we demonstrate that CSP has a desired barrier coverage performance and S-DCSP and G-DCSP have similar performance as that of CSP.

关键词： Robot sensing systems Monitoring Mobile communication Algorithm design and analysis Mobile computing Belts

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Enhanced simultaneous Congo red decolorization and bioelectricity generation in microbial fuel cell by humic acid

Enhanced simultaneous Congo red decolorization and bioelectr...

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第十五次全国环境微生物学学术研讨会

作者： Jian Sun Yongyou Hu Qian Xu Ya-ping Zhang Bin Hou Sizhe Li Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area College of Environmental Science and EngineeringSouthChina University of TechnologyGuangzhou510006China State Key Lab of Pulp and Paper Engineering College of Light Industry and Food ScienceSouth China University of TechnologyGuangzhou510640China

Efficient electron transfer among microbes,azo dye and anode is a key factor for simultaneous azo dye decolorization and electricity generation in microbial fuel cell (MFC).In this study,natural mediator-humic acid (HA) was introduced to enhance such extracellular electron *** results showed that the addition of HA greatly enhanced azo dye decolorization and electricity generation *** of 5g/L HA resulted in 45% increase in maximum power density and almost 300% increase in decolorization rate of Congo *** data of reduction in anode polarization resistance and accelerated reductive decolorization of Congo red in the presence of HA indicated that HA is particularly effective in facilitate electrons transfer from microbes to azo dye and microbes to *** gradient gel electrophoresis and direct 16S ribosomal DNA gene nucleotide sequencing revealed that the addition of HA did not change the microbial community composition in the MFC but result in the growth of some dominant bacterial *** species were most likely to utilize HA as mediator to accelerate the rate of electrons transfer involved in both electricity generation and azo dye decolorization.

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Adaptive position tracking control for electro-hydraulic servo system with input saturation

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ICIC Express Letters 2012年第10期6卷 2699-2704页

作者： Shi, Shengli Fang, Yiming Li, Jianxiong Jiao, Zongxia Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University No. 438 Hebei Ave. Qinhuangdao 066004 China College of Science Yanshan University No. 438 Hebei Ave. Qinhuangdao 066004 China College of Automation Beijing University of Aeronautics and Astronautics No. 37 Xueyuan Road Haidian Dist. Beijing 100191 China

An adaptive controller is proposed for the position tracking of an electrohydraulic servo system with uncertainties and input saturation. Firstly, fuzzy logic is employed to approximate the unknown nonlinear uncertainties. And a nonlinear tracking controller is developed by combining the adaptive backstepping with H∞ control method. In addition, in order to tackle the input constraint, an auxiliary design system based on Lyapunov method is presented. The proposed controller not only can effectively avoid the problem of input saturation, but also can guarantee that the output tracking error satisfies the H-infinity performance. Finally, the simulation results testify the effectiveness of the proposed method. © 2012 ISSN.

关键词： Tracking (position)

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System of the mine gas detection and location based on WSN technology

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2nd World Congress on computer Science and Information engineering, CSIE 2011

作者： Sun, Yingchun Fan, Jianying Xu, Jiandong School of Measure-Control Technology and Communication Engineering Harbin University of Science and Technology Harbin Heilongjiang Province China Springer-Verlag Computer Science Editorial Tiergartenstr. 17 69121 Heidelberg Germany Higher Educ. Key Lab. for Measuring and Contr. Technol. and Instrum. of Heilongjiang Prov. Harbin University of Science and Technology Harbin Heilongjiang Province China Information and Electronic Technology Institute Jiamusi University Jiamusi Heilongjiang Province China

ISBN: (纸本)9783642257681

In order to resolve the detection problem of coal mine gas content detection, and ensure the personal safety under the ground, we design the gas content detection system which based on the technology of ZigBee. The system includes two functional models, which are ZigBee and gas sensor. We can control the system functional model by computer net, which can realize the radio transmit by use of ZigBee technology. It can real-time work, and the precise high, transmit far away. The system hardware is simple, operate easily, cost cheap, which can be used in coal mine and safety detection. © Springer-Verlag Berlin Heidelberg 2012.

关键词： Gases

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