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第23届过程控制会议

作者： Luping Zhao Chunhui Zhao Furong Gao Department of Chemical and Biomolecular Engineering The Hong Kong University of Science and Technology Clear Water BayKowloon Hong Kong State Key Laboratory of Industrial Control Technology Department of Control Science and Engineering Zhejiang UniversityHangzhou 310027 China Department of Chemical and Biomolecular Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong State Key Laboratory of Industrial Control Technology Department of Control Science and Engineering Zhejiang Un

tch processes usually consist of multiple phases with different characteristics. Many research works have been done, focusing on process monitoring as well as quality prediction using phase information. However, few of them consider transitions from phase to phase, although transitions widely exit in batch processes and have non-ignorable impacts on product qualities. In the present work, a phase-based PLS method utilizing transition information is proposed to give both online and offline quality predictions, based on the understanding of the way transitions impact product qualities. First, batch processes are divided into several phases. Regression parameters other than prior process knowledge are utilized in phase division. Then both steady phases and transitions which have great influences on qualities are identified as critical-to-quality phases using statistical methods. Finally, based on the analysis of different characteristics of transitions and steady phases, an accumulative algorithm is developed for quality prediction. The application to an injection molding process shows the effectiveness of the proposed algorithm in comparison with the traditional MPLS method and the stage-based PLS method.

关键词： multi-phase transition PLS quality prediction.

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Distributed active sensor scheduling for target tracking in ultrasonic sensor networks

Distributed active sensor scheduling for target tracking in ...

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作者： Zhang, Fan Chen, Jiming Li, Hongbin Sun, Youxian Shen, Xuemin Sherman State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou 310027 China Department of Electrical and Computer Engineering University of Waterloo Waterloo ON N2L 3G1 Canada

Active ultrasonic sensors for target tracking application may suffer from inter-sensor-interference if these highly dense deployed sensors are not scheduled, which can degrade the tracking performance. In this paper, we propose a dynamic distributed sensor scheduling (DSS) scheme, where the tasking sensor is elected spontaneously from the sensors with pending sensing tasks via random competition based on Carrier Sense Multiple Access (CSMA). The channel will be released immediately when sensing task is completed. Both simulation results and testbed experiment demonstrate the effectiveness of DSS scheme for large scale sensor networks in terms of system scalability and high tracking performance. © Springer science+Business Media, LLC 2011.

关键词： Wireless sensor networks

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Energy-efficient intrusion detection with a barrier of probabilistic sensors

Energy-efficient intrusion detection with a barrier of proba...

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

作者： Junkun Li Jiming Chen Ten H. Lai State Key Laboratory of Industrial Control Technology University of Zhejiang China Department of Computer Science and Engineering Ohio State Uinversity USA

ISBN: (纸本)9781467307734

Intrusion detection is a significant application in wireless sensor networks (WSNs). S. Kumar et al have introduced the concept of barrier coverage, which deploys sensors in a narrow belt region to guarantee that any intrusion across the region is to be detected. However, the practical issues have not been investigated such as scheduling sensors energy-efficiently while guaranteeing the detection probability of any intrusion across the region based on probabilistic sensing model, which is a more realistic sensing model. Besides, the intruders may be humans, animals, fighter planes or other things, which obviously have diverse moving speeds. In this paper, we analyze the detection probability of arbitrary path across the barrier of sensors theoretically and take the maximum speed of possible intruders into consideration since the sensor networks are designed for different intruders in different scenarios. Based on the theoretical analysis of detection probability, we formulate a Minimum Weight ∈-Barrier Problem about how to schedule sensors energy-efficiently. We show the problem NP-hard and propose a bounded approximation algorithm, called Minimum Weight Barrier Algorithm (MWBA) to schedule the activation of sensors. To evaluate our design, we analyze the performance of MWBA theoretically and also perform extensive simulations to demonstrate the effectiveness of our proposed algorithm.

关键词： Wireless sensor networks Probabilistic logic Belts Sensor phenomena and characterization Image edge detection Algorithm design and analysis

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Analysis of the Effect of Idle Rollers on Tension Vibration in Discontinuous Web Transport Systems

Analysis of the Effect of Idle Rollers on Tension Vibration ...

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2012 International Conference on Smart Technologies for Materials and Communication(ICSTMC 2012)

作者： Jiankui Chen Yongan Huang Zhouping Yin Department of Control Science and Engineering Huazhong University of Science and Technology State Key Lab of Digital Manufacturing Equipment & Technology Huazhong University of Science and Technology

Tension control and precise conveyance in web-handling machines are critical to ensure product quality. This paper is focused on analyzing the effect of idle rollers on flexible web tension vibration for discontinuous web transport systems. First, the simplified algebraic dynamical models of the inertia and friction are presented, which plays an important role for the design of idle rollers' layout systems. Second, the tension vibration test method and tension data collection scheme are introduced, respectively. Finally, based on the mathematical model and test strategies, an experiment platform is established. Several experiments have been performed to show idle rollers' effect on tension control and tension vibration in the discontinuous web transport system.

关键词： Tension control idle roller discontinuous winding tension vibration programmable multiple axis controller

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Test and analysis of conducted disturbance sources of the truck crane under stable conditions

Test and analysis of conducted disturbance sources of the tr...

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International Symposium on Electromagnetic Compatibility, EMC EUROPE 2012

作者： Xiao, Li Yu, Zhanqing Chen, Shuiming Zhang, Bo Zeng, Rong Zhuang, Chijie Zeng, Yang Yu, Xiaoying Zhang, Qian State Key Lab of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing China Research Institute Zoomlion Heavy Industry Science and Technology Development Co. Ltd. Changsha Hunan China

ISBN: (纸本)9781467307185

The Electromagnetic Compatibility (EMC) is a major issue for the truck crane designing, due to the large dimension. The conducted disturbance sources of truck crane was measured under stable conditions, the time domain characteristics of possible conducted disturbance sources was analyzed, and typical waveforms were concluded to solve the EMC (Electromagnetic Compatibility) issue. The electromagnetic disturbance characteristics at different test points under different operation conditions were compared, and the influence of different factors was studied. The amplitude and frequency parameters of the major disturbance sources were compared with the standard immunity test pulses suggested by ISO7637-2. The differences between them indicate that the extant standard might not apply to the test of the truck crane. The presented results could form a basis for the development of a special standard for the EMC test of the truck crane and further relevant EMC research. © 2012 IEEE.

关键词： Electromagnetic compatibility

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Reduced precision solution criteria for nonlinear model predictive control with the feasibility-perturbed sequential quadratic programming algorithm

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Journal of Zhejiang University-science C(Computers and Electronics) 2011年第11期12卷 919-931页

作者： Jiao-na WAN Zhi-jiang SHAO Ke-xin WAN Xue-yi FANG Zhi-qiang WANG Ji-xin QIAN State Key Lab of Industrial Control Technology Institute of Industrial Control Department of Control Science and Engineering Zhejiang University Hangzhou 310027 China

We propose a novel kind of termination criteria, reduced precision solution (RPS) criteria, for solving optimal control problems (OCPs) in nonlinear model predictive control (NMPC), which should be solved quickly for new inputs to be applied in time. Computational delay, which may destroy the closed-loop stability, usually arises while non-convex and nonlinear OCPs are solved with differential equations as the constraints. Traditional termination criteria of optimization algorithms usually involve slow convergence in the solution procedure and waste computing resources. Considering the practical demand of solution precision, RPS criteria are developed to obtain good approximate solutions with less computational cost. These include some indices to judge the degree of convergence during the optimization procedure and can stop iterating in a timely way when there is no apparent improvement of the solution. To guarantee the feasibility of iterate for the solution procedure to be terminated early, the feasibility- perturbed sequential quadratic programming (FP-SQP) algorithm is used. Simulations on the reference tracking performance of a continuously stirred tank reactor (CSTR) show that the RPS criteria efficiently reduce computation time and the adverse effect of computational delay on closed-loop stability.

关键词： Nonlinear model predictive control （NMPC） Computational delay Termination criteria Continuously stirred tankreactor （CSTR）

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The finite element simulation study on thermal deformation of ground heat exchange pipe

The finite element simulation study on thermal deformation o...

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2012 2nd International Conference on Electronic and Mechanical engineering and Information technology, EMEIT 2012

作者： Zhu, Xiaolin Gao, Qing Wang, Youtang Yu, Ming State Key Lab. of Automotive Simulation and Control Jilin University Changchun 130025 China Department of Thermal Energy Engineering Jilin University Changchun 130025 China College of Materials Science and Engineering Jilin University Changchun 130025 China

ISBN: (纸本)9789078677604

During long-time operation, thermal deformation of heat exchange pipe weaken the capability and reduce the reliability of heat transfer system, especially the heat exchange pipe with initial bending in high temperature storage condition will make problem more seriously. The finite element simulation study based on ABAQUS code was carried out to explore thermal deformation behavior of heat exchange pipe and interaction between pipe-soil interfaces, through establishing the typical initial bending model of pipe body and the description of the basic equations The distribution law of effective stress, displacement and plastic strain at feature edges and the cross section were obtained. The result showed that value of effective stress, displacement and plastic strain distribution of soil are cyclical fluctuation change with different bending deflection and bending direction, the location of maximum bending deflection is the most serious heat transfer attenuation areas. © the authors.

关键词： Finite element method

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The study on measuring method of heat exchange pipe deformation and displacement based on thermal strain

The study on measuring method of heat exchange pipe deformat...

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2012 2nd International Conference on Electronic and Mechanical engineering and Information technology, EMEIT 2012

作者： Wang, Youtang Gao, Qing Zhu, Xiaolin Yu, Ming State Key Lab. of Automotive Simulation and Control Jilin University Changchun 130025 China Department of Thermal Energy Engineering Jilin University Changchun 130025 China College of Materials Science and Engineering Jilin University Changchun 130025 China

ISBN: (纸本)9789078677604

Thermal deformation of heat exchange pipe is the significant source of structural variation in ground heat exchange system, which could weaken the capability and reduce the reliability of heat transfer system after long-time operation. The experimental study of thermal deformation of heat exchange pipe should be carried out to explore its thermal behavior. The strain measuring method was applied to the study on thermal deformation and displacement, which was deduced from the measured strain in heat exchange pipe. The verifying experiment was carried out to analyse its feasibility in preliminary simulation environment. The result showed that strain measuring method is applicable and could be conducive to the deformation monitoring of heat exchange pipe in practical projects. © the authors.

关键词： Deformation

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Decentralized control of Heterogeneous Multi-agents in Collective Circular Motion

Decentralized Control of Heterogeneous Multi-agents in Colle...

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Chinese control Conference

作者： Zhiyong Chen Hai-Tao Zhang School of Electrical Engineering and Computer Science The University of Newcastle Department of Control Science and Engineering State Key Lab of Digital Manufacturing Equipments and Technology Huazhong University of Science and Technology

ISBN: (纸本)9781467325813

It is an interesting topic to study decentralized control algorithms for a group of agents to achieve a class of collective circular motion, or called torus. An algorithm was proposed in [1] where no global beacon information is required, however, the agents are homogeneous. In particular, it was assumed that the agents have a common nominal rotation radius and share a common reference frame. In this paper, an improved algorithm is proposed on heterogeneous agents by removing the two assumptions.

关键词： Multi-agent systems Collective behavior Circular motion Torus Heterogeneous multi-agents toruses Torus Circular motion Multi-agent systems decentralised control Agents REFERENCE FRAMES Collective Behavior

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Clearance of flight control law based on H-infinity theory

Clearance of flight control law based on H-infinity theory

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International Conference on Modelling, Identification and control (ICMIC)

作者： Shuai Dong Zhishen Wang Lei Liu Liuli Ou Yongji Wang Key Lab for Image Processing & Intelligent Control Department of Control Science and Engineering Huazhong University of Science and Technology 1037 Luoyu Road Wuhan China

The H∞ approach is used for the clearance of flight control laws when some parameters in the flight control system vary in a certain range. The proposed H∞ approach is developed from general H∞ theory and is applied to the clearance of a flight control law for a missile. Based on bounded real lemma, two theorems about clearance are deduced, and the clearance problem is transformed to a general linear matrix inequality problem. A BTT missile is chosen as an example to test the proposed method. The simulation result shows that the proposed method is convenient and efficient.

关键词： Aerospace control Uncertainty Mathematical model Uncertain systems Aerodynamics Missiles control systems

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